Fire not only changed food's chemistry, it changed is biology as well. Cooking killed germs and parasitesthat infested food. Humans also had a far easier time chewing and digesting old favourites suchfruits, nus, insects, and carrion if they were cooked. Whereas chimpanzees spend five hours aday chewing raw food, a single hour suffices for people eating cooked food. The advent of cooking enabled humans to eat more kinds of food, to devote less timeto eating and to make do with smaller teeth and shorter intestines. Some scholars believe thereis a direct link between the advent of cooking, the shortening of the human intestinal track, andthe growth of the human brain, Since long intestines and large brains are both massive energy consumers, it's hard to have both. By shortening the intestines and decreasing their energy consumption, cooking inadvertently opened the way to the jumbo brains of Neanderthals and Sapiens. The domestication of fire was, therefor, a sign of things to come. Adapted from Sapiens: A brief History of Humankind by Yuval Noah Harari: London: VintageBooks, 2011. Kenya Certificate of Secondary Education, 2019919240 10123 According tothe author, when did humans invent fire? 2 marks b In about 5 words, summarise what early humans used fire for before they cookedwith it. S marks Rough copy Fair copy Kenya Certificate of Secondary Education, 2019919240 1012 Turn over o19240entity four advantages of cooked food. Explain the link that the author Sees between eating cooked food and the development of the human brain, G marks What isthe main point of this passage? Marks Explain the meaning of each of the following words as used in the passage: 4 marks dependable ..Gi entrepreneurs Gil advent Gv inadvertently . Kenya Certificate of Secondary Education, 2019101729192402. Henrik ibsen, A Doll s HouseRead the excerpt below and then answer the questions that follow. 25 marks Children: in the doorway on the left Mother, the stranger man has gone out through thegateNora Yes, dears, know. But, don t tell anyone about the stranger man.


Henrik ibsen, A Doll s HouseRead the excerpt below and then answer the questions that follow. 25 marks Children: in the doorway on the left Mother, the stranger man has gone out through thegateNora Yes, dears, know. But, don t tell anyone about the stranger man. Do you hear? Not even papa. Children; No, mother; but will you come and play again?Ne No, no, not now. Children: But, mother, you promised us. Nora: Yes, but I can t now. Run away in; Ihave such a lot to do. Run away in, my sweetlitle darlings. She gets them into the room by degrees and shuts the door on them; then sits down on the sofa, takes up a piece of needlework and sews a fewstitches, but soon stops. No! Throws down the work, gets up, goes to the halldoor and calls out Helen! Bring the Tree in. Goes to the table on the left, opens adrawer; and stops again No, no! Itis quite impossible!Maid coming in with the Tree Where shall I put it, ma'am?Nora: Here, in the middle of the floor. Maid: Shall I get you anything else?Nora: No, thank you. Have all I want. Exit MAID. Nora begins dressing the tree A candle here and flowers here The horrible man!It s all nonsense thee nothing wrong. The tree shall be splendia! I will do everything I can think of to please you, Torvald! I will sing for you, dance foryou HELMER comes in with some papers under his arm. Ohi are you backalready?Helmer: Yes. Has anyone been here?Nora: Here? No. Helmer: That is strange. I saw Krogstad going out ofthe gate. Nora: Did you?


Has anyone been here?Nora: Here? No. Helmer: That is strange. I saw Krogstad going out ofthe gate. Nora: Did you? Oh yes, I forgot, Krogstad was here for a moment,Helmer: Nora, I can see from your manner that he has been here begging you to say agood word for him,ema Creo Scary Eaton, 209 aiain TurnoverNora: Yes. Helmer: And you were to appear to do it of your own accord; you were to conceal from,ime the fact of his having been here; didn t he beg that of you too?Nora Yes, Torvald, but Helmer; Nora, Nora, and you would be a party to that sort of thing? To have any talk with aman like that, and give him any sort of promise? And to tell me lie into thebargain?Nora Alie ? Helmer: Didn't you tell me no one had been here? Shakes his finger at her My litle song.bird must never do that again. A songbird must have a clean beak to chirp with no false notes! Puts his arm round her waist That isso, isn t it? Yes, Iam sureit is. Lets her go. We will say no more about it. Sits down by the stove How warm and snug itis here! Turns over his papers Place the excerpt inits immediate context. 4 marks b The Christmas tree is mentioned many times inthe play. What does it stand for? B marks Deseribe the character of Helmer as brought out in the excerpt. 4 marks Kenya Certificate of Secondary Education, 201919240 1012 wo hy919240 7What is the role ofthe children in the play? Marks Identify and illustrate two styl 4 marks Identify and illustrate two themes brought out in the play. 4 marks Don't tell anyone about the stranger man. Rewrite beginning: Under... I mark Describe the tone of this passage.


Marks Identify and illustrate two styl 4 marks Identify and illustrate two themes brought out in the play. 4 marks Don't tell anyone about the stranger man. Rewrite beginning: Under... I mark Describe the tone of this passage. Marks Kenya Certificate of Secondary Education, 201910172 Turn over3 Read the story below and then answer the questions that follow. Once upon a time a father sent for his three sons and gave to the eldest a cock, tothe second ascythe, and the third a cat. I am now old , said he, my end is approaching, and I would fainprovide for you before I die. Money I have none, and what I now give you seems of litle worth;yeti rests with yourselves alone to turn my gifts to good account. Only seek out for a land where what you have is as yet unknown, and your fortune is made. Afier the death of the father, the eldest set out with his cock: but wherever he went, in every town, he saw from a far off a cock sitting upon the church steeple, and turning round withthe wind, In the villages he always heard plenty of them crowing, and his bird was thereforenothing new; so there did not seem much chance of his making his fortune. At length it happenedthat he eame to an island where the people who lived there had never heard of a cock and knew not even how to reckon the time. They knew indeed if it were moming ot evening; but at night ifthey lay awake, they had no means of knowing how time went, Behold, said he to them, what a noble animal this is! He carries a bright red crest upon.his head, and spurs upon his heels; he crows three times every night at stated hours, and atthethird time the sun is about to rise. But this isnot all; sometimes he screams in broad daylight, andthen you must take warning, for the weather is surely about to change. This pleased the natives mightily; they kept awake one whole night, and heard, to their great joy, how gloriously the cockcalled the hour, at two, four and six o'clock. Then they asked him whether the bird was tobe sold,and how much he would sell it for. About as much as an ass can carry, said he. A.


But this isnot all; sometimes he screams in broad daylight, andthen you must take warning, for the weather is surely about to change. This pleased the natives mightily; they kept awake one whole night, and heard, to their great joy, how gloriously the cockcalled the hour, at two, four and six o'clock. Then they asked him whether the bird was tobe sold,and how much he would sell it for. About as much as an ass can carry, said he. A. very fair price for such an animal, cried they with one voice; and agreed to givehim what he asked. When he returned home with his wealth, his brothers wondered greatly; and the secondsaid, I will now set forth likewise, and see if I can tur my seythe to as good an account. Theredid not seem, however, much likelihood of this; for go where he would, he was met by peasantswho had as good a scythe on their shoulders as he had. But at last, as good luck would have it,the came to an island where the people had never heard of a scythe; there, as soon asthe corn wasripe, they went into the fields and pulled it up; but this was very hard work and a great deal of it was lost. The man then set to work with his scythe; and mowed down their whole crop so quickly,thatthe people stood staring open-mouthed with wonder. They were willing to give him what heasked for such a marvelous thing; but he only took a horse laden with as much gold as it ouldcarryNow the third brother had a great longing, to go and see what he could make of his eat. So eset out; and at first it happened to him as it had tothe others, so long as he kept upon the msland, he met with no success; there were plenty of eats everywhere, indeed too many, so that the young ones were for the most part, as soon as they came into the world, drowned in the water. Atlast he passed over to an island where, as it chanced most luckily for him, nobody had ever seenand they were overrun with mice to such a degree, thatthe little wretches danced upon thetables and chairs, whether the master of the house were at home or not.


They were willing to give him what heasked for such a marvelous thing; but he only took a horse laden with as much gold as it ouldcarryNow the third brother had a great longing, to go and see what he could make of his eat. So eset out; and at first it happened to him as it had tothe others, so long as he kept upon the msland, he met with no success; there were plenty of eats everywhere, indeed too many, so that the young ones were for the most part, as soon as they came into the world, drowned in the water. Atlast he passed over to an island where, as it chanced most luckily for him, nobody had ever seenand they were overrun with mice to such a degree, thatthe little wretches danced upon thetables and chairs, whether the master of the house were at home or not. The people complainedloudly of this grievance; the King himself knew not how to rid him self of them in his palaevery comer mice were squeaking, and they gnawed everything that their teeth could lay hold Kenya Certificate of Secondary Education, 201919240 101729 of, Here was a fine field for Puss she soon began her chase and had cleared two rooms in thetwinkling of an eye; when the people besought their King to buy the wonderful animal, for the B00d ofthe public, at any price. The King willingly gave what was asked a mule laden with gold nd jewels; and thus the third brother returned home with a richer prize than either of the others. Meanwhile the cat feasted away upon the mice in the royal palace, and devoured so manythat they were no longer in any great numbers. At length, quite spent and tired with her work shebecame extremely thirsty; so she stood still, drew up her head, and cried, Miau, Miau! Whenthe people heard this ery they ran shrieking in great fright. The King and his council decided to send a herald to the cat to warn her to leave the castle forthwith, or that force would be used toremove her.


Meanwhile the cat feasted away upon the mice in the royal palace, and devoured so manythat they were no longer in any great numbers. At length, quite spent and tired with her work shebecame extremely thirsty; so she stood still, drew up her head, and cried, Miau, Miau! Whenthe people heard this ery they ran shrieking in great fright. The King and his council decided to send a herald to the cat to warn her to leave the castle forthwith, or that force would be used toremove her. We would far more willingly put up with the mice since we are used to that evil ,than get rid of them atthe risk of our lives. A page accordingly went and asked the cat whether she was willing to quit the castle, But Puss, whose thirst became every moment more and more pressing answered Miau! Miau! Which the page interpreted to mean, No! No! And therefore carried this answer to the King. Then we must try what force will do, the Ki So the guns were planted, and thepalace was fired upon from all sides. When the fire reached the room where the cat was, shesprang out of the window and ran away; but the besiegers did not see her, and went on.firing uni the whole palace was burnt to the ground, Adapted from Grimm's Fairy Tales by Jacob and Wilhelm Grimm How does the father prepare his sons fora life without hin? 2 marks b Why was the first son at first almost despairing? 2 marks How would you deseribe the first son from what he says? 2 marks Kenya Certificate of Secondary Education, 2019919240 10172o oOwy 919240 10 What is implied about the islanders who bought the cock? Illustrate your answer. G marks How do we know thatthe islanders were convinced thatthe cock was very precious? Marks Explain the meaning of the following metaphor: Here was a fine field for Puss. 2 marks What wo lessons do we lear from this story? Marks Kenya Certificate of Secondary Education, 2019101 72n4 Rewrite the following to remove ambiguity. 3 marks Juma told Ali that he lacked self-confidence. Gi Tsaw a monkey with a telescope.


Marks Kenya Certificate of Secondary Education, 2019101 72n4 Rewrite the following to remove ambiguity. 3 marks Juma told Ali that he lacked self-confidence. Gi Tsaw a monkey with a telescope. Ii Look at that cow with one eye. B Choose the correct option from those given in brackets marks 0 My sister has five children and now she Wants 0 son. 8 Sixth one. Adapvadopt Te nirpag tie Mahoning secondary schoo wil be the guest of ii My father was sitting in the . Room when the guest arived. Leaving, living Complete the following using an appropriate preposition marks There is no exception...this rue, ii My friends congratulated me .........my recent achievement. Ii Kola has special liking Mathematis. Choose the best connector from those given in brackets. G marks She isa new employee; mummy She has done very well. Although even as nevertheless i My brother is very committed to his WOFK; .owsnn-y be has eared frequent promotions. Nonetheless notwithstanding consequently Gi Jason seems to be quite intelligent... ye often gets poor grades. Similarly however otherwise Kenya Certificate of Secondary Education, 2019919240 1012. Turn over 9192402Complete the following sentences by supplying the correct form of the verb given inbrackets. G marks i Hfthey had not .hhim money, he would not have gone for the trip. Sent send Gi Weare going to house for our mother. Build buil Git Let our clothes here.hang bung Kenya Certificate of Secondary Education, 201910172.


For More Free KCSE past papers visit www.freekcsepastpapers.comK.C.S.E.CHEMISTRY PAPER 1 20121Charcoal is a fuel that is commonly used for cooking. When it burns it forms two oxides. A Name the two oxides. 2 marks b State one use of any of the two oxides. 1 mark 2 Iron III oxide was found to be contaminated with copper II sulphate. Describe howa pure sample of iron III oxide can be obtained. 3 marks 3In an experiment, dry hydrogen gas was passed over heated Lead II Oxide as shown inthediagram below. State and explain the observations made in the combustion tube. 3 marks 4.The table below shows properties of some elements A, B, C and D which belong tothe same period of the periodic table. The letters are not the actual symbols of theelements. ElementABcDMp C 141098-101660Atomic radii nm 0.1170.1860.0990.143ElectricalconductivityPoorGoodNonconductorsGood a Arrange the elements in the order they would appear in the period. Give a reason. 2 marks b Select the metallic element which is the better conductor of electricity. Give areason. For More Free KCSE past papers visit www.freekcsepastpapers.com 1 mark 5.A sample of water in a beaker was found to boil at 101.5 C at 1 atmospheric pressure. Assuming that the thermometer was not faulty, explain this observation. 1mark 6.Study the information in the table below and answer the questions that follow:SaltSolubility g 100gwater at 40 Cat 60 CCuSO42838Pb NQ3 27998A mixture containing 35g of CuS04 and 78g of Pb N03 2 in l00g of water at 60 C wascooledto 40 C. a Which salt crystallised out? Give a reason 2 marks b Calculate the mass of the salt that crystallised out. 1 mark 7.Ammonium ion has the following structure:Label on the structure: a covalent bond; 1 mark b coordinate dative bond.


Give areason. For More Free KCSE past papers visit www.freekcsepastpapers.com 1 mark 5.A sample of water in a beaker was found to boil at 101.5 C at 1 atmospheric pressure. Assuming that the thermometer was not faulty, explain this observation. 1mark 6.Study the information in the table below and answer the questions that follow:SaltSolubility g 100gwater at 40 Cat 60 CCuSO42838Pb NQ3 27998A mixture containing 35g of CuS04 and 78g of Pb N03 2 in l00g of water at 60 C wascooledto 40 C. a Which salt crystallised out? Give a reason 2 marks b Calculate the mass of the salt that crystallised out. 1 mark 7.Ammonium ion has the following structure:Label on the structure: a covalent bond; 1 mark b coordinate dative bond. 1 mark 8.10cm3 of concentrated sulphuric VI acid was diluted to 100cm3. 10cm3 of the resultingsolution was neutralised by 36cm3 of 0.1M sodium hydroxide solution. Determine themass ofsulphuric VI acid that was in the concentrated acid S 32.0; H 1.0; O 16.0 . 3 marks For More Free KCSE past papers visit www.freekcsepastpapers.com9120g of iodine - 131 has a half life of 8 days and decays for 32 days. On the grid provided,plot a graph of the mass of iodine - 131 against time. 3 marks 10 a Name two cations that are present in hard water. 1 mark b Explain how the ion exchange resin softens hard water. 2 marks 11.The empirical formula of A is CH2Br.


Determine themass ofsulphuric VI acid that was in the concentrated acid S 32.0; H 1.0; O 16.0 . 3 marks For More Free KCSE past papers visit www.freekcsepastpapers.com9120g of iodine - 131 has a half life of 8 days and decays for 32 days. On the grid provided,plot a graph of the mass of iodine - 131 against time. 3 marks 10 a Name two cations that are present in hard water. 1 mark b Explain how the ion exchange resin softens hard water. 2 marks 11.The empirical formula of A is CH2Br. Given that 0.470g of A occupies a volume of 56cm3at546K and 1 atmospheric pressure, determine its molecular formula. H 1.0, C 12.0, Br 80.0, molar gas volume at STP 22.4 dm3 . 3 marks For More Free KCSE past papers visit www.freekcsepastpapers.com12Study the flow chart below and answer the questions that follow. AmmoniaDryingHeatedgasagentblacksolidCoppermetalXNitrogen a Name a suitable drying agent for ammonia. 1 mark b Describe one chemical test for ammonia. 1 mark c Name X. 1 mark 13A dynamic equilibrium is established when hydrogen and carbon IV oxide react asshownbelow:H2 g C02 g H2O g CO g What is the effect of adding powdered iron catalyst on the position of the equilibrium?Give a reason. 2 marks 14Distinguish between ionisation energy and electron affinity of an element. 2marks 15 Below is a representation of an electrochemical cell. Pb s Pb2 aq Ag aq Ag s a What does represent? 1 mark b Given the following:EoVPb2 aq 2ePb s ; - 0.13Ag aq eAg s ; - 0.80Calculate the E.M.F of the electrochemical cell. 2 marks 16Use the following information on substances S, T, V and hydrogen to answer thequestionsthat follow:For More Free KCSE past papers visit www.freekcsepastpapers.com i T displaces V from a solution containing V ions. Ii Hydrogen reacts with the heated oxide of S but has no effect on heated oxide of V.


On the grid provided,plot a graph of the mass of iodine - 131 against time. 3 marks 10 a Name two cations that are present in hard water. 1 mark b Explain how the ion exchange resin softens hard water. 2 marks 11.The empirical formula of A is CH2Br. Given that 0.470g of A occupies a volume of 56cm3at546K and 1 atmospheric pressure, determine its molecular formula. H 1.0, C 12.0, Br 80.0, molar gas volume at STP 22.4 dm3 . 3 marks For More Free KCSE past papers visit www.freekcsepastpapers.com12Study the flow chart below and answer the questions that follow. AmmoniaDryingHeatedgasagentblacksolidCoppermetalXNitrogen a Name a suitable drying agent for ammonia. 1 mark b Describe one chemical test for ammonia. 1 mark c Name X. 1 mark 13A dynamic equilibrium is established when hydrogen and carbon IV oxide react asshownbelow:H2 g C02 g H2O g CO g What is the effect of adding powdered iron catalyst on the position of the equilibrium?Give a reason. 2 marks 14Distinguish between ionisation energy and electron affinity of an element. 2marks 15 Below is a representation of an electrochemical cell. Pb s Pb2 aq Ag aq Ag s a What does represent? 1 mark b Given the following:EoVPb2 aq 2ePb s ; - 0.13Ag aq eAg s ; - 0.80Calculate the E.M.F of the electrochemical cell. 2 marks 16Use the following information on substances S, T, V and hydrogen to answer thequestionsthat follow:For More Free KCSE past papers visit www.freekcsepastpapers.com i T displaces V from a solution containing V ions. Ii Hydrogen reacts with the heated oxide of S but has no effect on heated oxide of V. a Arrange substances S, T, V and hydrogen in the order of increasing reactivity. 2 marks b If T and V are divalent metals, write an ionic equation for the reaction in i above.


3 marks 10 a Name two cations that are present in hard water. 1 mark b Explain how the ion exchange resin softens hard water. 2 marks 11.The empirical formula of A is CH2Br. Given that 0.470g of A occupies a volume of 56cm3at546K and 1 atmospheric pressure, determine its molecular formula. H 1.0, C 12.0, Br 80.0, molar gas volume at STP 22.4 dm3 . 3 marks For More Free KCSE past papers visit www.freekcsepastpapers.com12Study the flow chart below and answer the questions that follow. AmmoniaDryingHeatedgasagentblacksolidCoppermetalXNitrogen a Name a suitable drying agent for ammonia. 1 mark b Describe one chemical test for ammonia. 1 mark c Name X. 1 mark 13A dynamic equilibrium is established when hydrogen and carbon IV oxide react asshownbelow:H2 g C02 g H2O g CO g What is the effect of adding powdered iron catalyst on the position of the equilibrium?Give a reason. 2 marks 14Distinguish between ionisation energy and electron affinity of an element. 2marks 15 Below is a representation of an electrochemical cell. Pb s Pb2 aq Ag aq Ag s a What does represent? 1 mark b Given the following:EoVPb2 aq 2ePb s ; - 0.13Ag aq eAg s ; - 0.80Calculate the E.M.F of the electrochemical cell. 2 marks 16Use the following information on substances S, T, V and hydrogen to answer thequestionsthat follow:For More Free KCSE past papers visit www.freekcsepastpapers.com i T displaces V from a solution containing V ions. Ii Hydrogen reacts with the heated oxide of S but has no effect on heated oxide of V. a Arrange substances S, T, V and hydrogen in the order of increasing reactivity. 2 marks b If T and V are divalent metals, write an ionic equation for the reaction in i above. 1mark 17Study the energy level diagram below and answer the questions that follow.


Given that 0.470g of A occupies a volume of 56cm3at546K and 1 atmospheric pressure, determine its molecular formula. H 1.0, C 12.0, Br 80.0, molar gas volume at STP 22.4 dm3 . 3 marks For More Free KCSE past papers visit www.freekcsepastpapers.com12Study the flow chart below and answer the questions that follow. AmmoniaDryingHeatedgasagentblacksolidCoppermetalXNitrogen a Name a suitable drying agent for ammonia. 1 mark b Describe one chemical test for ammonia. 1 mark c Name X. 1 mark 13A dynamic equilibrium is established when hydrogen and carbon IV oxide react asshownbelow:H2 g C02 g H2O g CO g What is the effect of adding powdered iron catalyst on the position of the equilibrium?Give a reason. 2 marks 14Distinguish between ionisation energy and electron affinity of an element. 2marks 15 Below is a representation of an electrochemical cell. Pb s Pb2 aq Ag aq Ag s a What does represent? 1 mark b Given the following:EoVPb2 aq 2ePb s ; - 0.13Ag aq eAg s ; - 0.80Calculate the E.M.F of the electrochemical cell. 2 marks 16Use the following information on substances S, T, V and hydrogen to answer thequestionsthat follow:For More Free KCSE past papers visit www.freekcsepastpapers.com i T displaces V from a solution containing V ions. Ii Hydrogen reacts with the heated oxide of S but has no effect on heated oxide of V. a Arrange substances S, T, V and hydrogen in the order of increasing reactivity. 2 marks b If T and V are divalent metals, write an ionic equation for the reaction in i above. 1mark 17Study the energy level diagram below and answer the questions that follow. A Give the name of HA 1 mark b How can HB be reduced?


A Arrange substances S, T, V and hydrogen in the order of increasing reactivity. 2 marks b If T and V are divalent metals, write an ionic equation for the reaction in i above. 1mark 17Study the energy level diagram below and answer the questions that follow. A Give the name of HA 1 mark b How can HB be reduced? Give a reason. 2 marks 18Acidified potassium manganate VII solution is decolourised when sulplur IV oxide isbubbled through it. The equation for the reaction is given below.2H2O 1 5S02 g 2KMnO4 aq K2SO4 aq 2MnSO4 aq 2H2SO4 aq a Which reactant is oxidised? Explain. 2 marks b Other than the manufacture of sulphuric VI acid, state one other use of sulphur IV For More Free KCSE past papers visit www.freekcsepastpapers.comoxide. 1 mark 19The set up shown below was used to investigate a property of hydrogen gas. State and explain the observation that would be made in the glass tube if beaker A wasfilledwith hydrogen gas. 3 marks 20Draw and name the isomers of pentane. 3 marks 21Give two uses of the polymer polystyrene. 1 mark 22Aluminium is both malleable and ductile, a What is meant by? I malleable; 1 mark ii ductible. 1 mark b State one use of aluminium based on: i malleability 1mark ii ductility 1mark For More Free KCSE past papers visit www.freekcsepastpapers.com23Describe how the percentage by mass of copper in copper carbonate can be determined. 3 marks 24The following set up of three test-tubes was used to investigate rusting of iron.


Give a reason. 2 marks 18Acidified potassium manganate VII solution is decolourised when sulplur IV oxide isbubbled through it. The equation for the reaction is given below.2H2O 1 5S02 g 2KMnO4 aq K2SO4 aq 2MnSO4 aq 2H2SO4 aq a Which reactant is oxidised? Explain. 2 marks b Other than the manufacture of sulphuric VI acid, state one other use of sulphur IV For More Free KCSE past papers visit www.freekcsepastpapers.comoxide. 1 mark 19The set up shown below was used to investigate a property of hydrogen gas. State and explain the observation that would be made in the glass tube if beaker A wasfilledwith hydrogen gas. 3 marks 20Draw and name the isomers of pentane. 3 marks 21Give two uses of the polymer polystyrene. 1 mark 22Aluminium is both malleable and ductile, a What is meant by? I malleable; 1 mark ii ductible. 1 mark b State one use of aluminium based on: i malleability 1mark ii ductility 1mark For More Free KCSE past papers visit www.freekcsepastpapers.com23Describe how the percentage by mass of copper in copper carbonate can be determined. 3 marks 24The following set up of three test-tubes was used to investigate rusting of iron. Study itandanswer the questions that follow. A Give a reason why rusting did not occur in test-tube C. 1 mark b Aluminium is used to protect iron sheets from rusting. Explain two ways in which aluminium protects iron from rusting. 2 marks 25Describe how a solid sample of potassium sulphate can be prepared starting with200cm3 of2M potassium hydroxide. 3 marks 26Describe two chemical tests that can be used to distinguish ethanol from ethanoic acid. 3 marks 27 a The electronic arrangement of the ion of element Q is 2.8.8.


The equation for the reaction is given below.2H2O 1 5S02 g 2KMnO4 aq K2SO4 aq 2MnSO4 aq 2H2SO4 aq a Which reactant is oxidised? Explain. 2 marks b Other than the manufacture of sulphuric VI acid, state one other use of sulphur IV For More Free KCSE past papers visit www.freekcsepastpapers.comoxide. 1 mark 19The set up shown below was used to investigate a property of hydrogen gas. State and explain the observation that would be made in the glass tube if beaker A wasfilledwith hydrogen gas. 3 marks 20Draw and name the isomers of pentane. 3 marks 21Give two uses of the polymer polystyrene. 1 mark 22Aluminium is both malleable and ductile, a What is meant by? I malleable; 1 mark ii ductible. 1 mark b State one use of aluminium based on: i malleability 1mark ii ductility 1mark For More Free KCSE past papers visit www.freekcsepastpapers.com23Describe how the percentage by mass of copper in copper carbonate can be determined. 3 marks 24The following set up of three test-tubes was used to investigate rusting of iron. Study itandanswer the questions that follow. A Give a reason why rusting did not occur in test-tube C. 1 mark b Aluminium is used to protect iron sheets from rusting. Explain two ways in which aluminium protects iron from rusting. 2 marks 25Describe how a solid sample of potassium sulphate can be prepared starting with200cm3 of2M potassium hydroxide. 3 marks 26Describe two chemical tests that can be used to distinguish ethanol from ethanoic acid. 3 marks 27 a The electronic arrangement of the ion of element Q is 2.8.8. If the formula of the ion isQ3,state the group and period to which Q belongs. Group: 1 2 mark Period: 1 2 mark For More Free KCSE past papers visit www.freekcsepastpapers.com b Helium, neon and argon belong to group 8 of the periodic table.


Explain. 2 marks b Other than the manufacture of sulphuric VI acid, state one other use of sulphur IV For More Free KCSE past papers visit www.freekcsepastpapers.comoxide. 1 mark 19The set up shown below was used to investigate a property of hydrogen gas. State and explain the observation that would be made in the glass tube if beaker A wasfilledwith hydrogen gas. 3 marks 20Draw and name the isomers of pentane. 3 marks 21Give two uses of the polymer polystyrene. 1 mark 22Aluminium is both malleable and ductile, a What is meant by? I malleable; 1 mark ii ductible. 1 mark b State one use of aluminium based on: i malleability 1mark ii ductility 1mark For More Free KCSE past papers visit www.freekcsepastpapers.com23Describe how the percentage by mass of copper in copper carbonate can be determined. 3 marks 24The following set up of three test-tubes was used to investigate rusting of iron. Study itandanswer the questions that follow. A Give a reason why rusting did not occur in test-tube C. 1 mark b Aluminium is used to protect iron sheets from rusting. Explain two ways in which aluminium protects iron from rusting. 2 marks 25Describe how a solid sample of potassium sulphate can be prepared starting with200cm3 of2M potassium hydroxide. 3 marks 26Describe two chemical tests that can be used to distinguish ethanol from ethanoic acid. 3 marks 27 a The electronic arrangement of the ion of element Q is 2.8.8. If the formula of the ion isQ3,state the group and period to which Q belongs. Group: 1 2 mark Period: 1 2 mark For More Free KCSE past papers visit www.freekcsepastpapers.com b Helium, neon and argon belong to group 8 of the periodic table. Give: i the general name of these elements; 1 mark ii one use of these elements. 1 mark 28The apparatus shown in the diagram below were used to investigate the products formedwhen concentrated sodium chloride was electrolysed using inert electrodes.


Study itandanswer the questions that follow. A Give a reason why rusting did not occur in test-tube C. 1 mark b Aluminium is used to protect iron sheets from rusting. Explain two ways in which aluminium protects iron from rusting. 2 marks 25Describe how a solid sample of potassium sulphate can be prepared starting with200cm3 of2M potassium hydroxide. 3 marks 26Describe two chemical tests that can be used to distinguish ethanol from ethanoic acid. 3 marks 27 a The electronic arrangement of the ion of element Q is 2.8.8.If the formula of the ion isQ3,state the group and period to which Q belongs. Group: 1 2 mark Period: 1 2 mark For More Free KCSE past papers visit www.freekcsepastpapers.com b Helium, neon and argon belong to group 8 of the periodic table. Give: i the general name of these elements; 1 mark ii one use of these elements. 1 mark 28The apparatus shown in the diagram below were used to investigate the products formedwhen concentrated sodium chloride was electrolysed using inert electrodes. A Write the equation for the reaction that takes place at electrode A. 1 mark b If the concentrated sodium chloride was replaced with dilute sodium chloride, whatproductwould be formed at electrode A?Explain. 2 marks 29.a State and explain what would happen if a dry blue litmus paper was dropped in a gas. 1mark b By using only dilute hydrochloric acid, describe how a student can distinguish betweenbarium sulphite from barium sulphate. 2marks For More Free KCSE past papers visit www.freekcsepastpapers.com.


THE KENYA NATIONAL EXAMINATIONS COUNCILKenya Certificate of Secondary Education23 2 BIOLOGY Paper 2 THEORY Nov. 2019 - 2 hours Name Index Number ...Candidate's Signature Date ..Instructions to candidates a Write your name and iridex number in the spaces provided above. 0 Sign and write the date of examination in the spaces provided above. C This paper consists of two sections: A and B. d Answer allthe questions in section A in the spaces provided. 0 In section B answer question 6 leompulsory and either question 7 or 8 in the spaces providedafter question 8. F This paper consists of 12 printed pages. A Candidates should check the question paper to ascertain that all the pages are printed asIndicated and that no questions are missing. H Candidates should answer all the questions in English. For Examiners Use Onlym CanSection Question Maximum Candidates a 8 4 a2 e A 3 4 8 3 8. 6 2020 Total Score 80 2019 The Kenya National Examinations Council2312919303 Turn overSECTION A 40 marks Answer all the questions in this section n the spaces provided. . In an experiment to investigate the effect of sodium chloride on the growth rate ina spinachseedling, seeds were treated with different concentrations of sodium chloride, The results are asrecorded in the table below. Concentration of Percentage of spinach seeds Mean rootsodium chloride mol which started to grow roots Aength um 0.00 99.98 1730006 98.20 15.60018 380 1.6 From the results in th table above, explain the effect of increasing the concentration ofsodium chloride. Marks b Apart from a ruler, state two other equipment one would need to determine the rate of growth inthe roots. 2 marks With a reason, state one other part of the seedling the students would focus on todetermine the effect of sodium chloride on growth, 2 marks Kenya Certificate of Secondary Education, 2019919303, 23123 Sate the likely effect on the seedling of increasing the concentration of sodium chloride102.20moVI Umark 2.


G marks Gi Explain the similarity inthe end results made in seediings If and Ill. 2 marks iil State the likely treatment that would make seedlings Il and IIL respond likeseedling I. 2 marks Kenya Certificate of Secondary Education, 2019919303 2324919303,sIn cats, the gene for fur colour is sex-linked. Letter G represents the gene for ginger fur colourwhile leer B represents the gene for black fur colour ina given cat species. These genes are codominant. Heterozygous females have ginger and black patches of fur and their phenotype is.described as tortose-shell, With reference tothe information given above, what is meant by the term codominance? U mark b Explain why male cats with a tortose-shell phenotype do not usually occur. 2 marks Atortoise-shell female was crossed with a black male. Determine the genotypes andphenotypes ofthe offspring, S marks Kenya Certificate of Secondary Education, 20192372 Turn over65, Apperson accidentally touches a hot pan and responds as illustrated inthe diagram below. Forearm 2 Explain how the response illustrated above occurs. 6 marks Explain how auxins are utilised as selective weed killers in agriculture.


Determine the genotypes andphenotypes ofthe offspring, S marks Kenya Certificate of Secondary Education, 20192372 Turn over65, Apperson accidentally touches a hot pan and responds as illustrated inthe diagram below. Forearm 2 Explain how the response illustrated above occurs. 6 marks Explain how auxins are utilised as selective weed killers in agriculture. 2 marks Kenya Certificate of Secondary Education, 2019Bud919303,7 SECTION B 40 marks Answer question 6 compulsory and either question 7 or 8 in the spaces provided after question 8.6. The table below shows the rate of product formation for two enzymes, H and J over arange ofi values,pH 10 20 30 40 so 60Rat of product formationRatcot prover formation 345 405 335 150 Rate of formation Ratcofprodut maton 150 200 300 405 235 110 7.0 80 90 100 60 On the same axis, plot graphs of the rate of product formation against pH. 8 marks b Account for the rate of product formation for enzyme H between: pH 1.0and3.0G marks Kenya Certificate of Secondary919303, 212 Education, 2019 919303,Gi pH3.0and 7.0, marks From the graph, determine: i the pH value at which the rate of product formation of the two enzymes was thesame 1 mark ii the value of the rate of product formation for enzymes H and Jat the pH valuestated in c above i mark ii the optimum pH value for enzyme 3 mark State one variable that may lead to the change in the optimum rate of product-formationof the two enzymes.


Forearm 2 Explain how the response illustrated above occurs. 6 marks Explain how auxins are utilised as selective weed killers in agriculture. 2 marks Kenya Certificate of Secondary Education, 2019Bud919303,7 SECTION B 40 marks Answer question 6 compulsory and either question 7 or 8 in the spaces provided after question 8.6. The table below shows the rate of product formation for two enzymes, H and J over arange ofi values,pH 10 20 30 40 so 60Rat of product formationRatcot prover formation 345 405 335 150 Rate of formation Ratcofprodut maton 150 200 300 405 235 110 7.0 80 90 100 60 On the same axis, plot graphs of the rate of product formation against pH. 8 marks b Account for the rate of product formation for enzyme H between: pH 1.0and3.0G marks Kenya Certificate of Secondary919303, 212 Education, 2019 919303,Gi pH3.0and 7.0, marks From the graph, determine: i the pH value at which the rate of product formation of the two enzymes was thesame 1 mark ii the value of the rate of product formation for enzymes H and Jat the pH valuestated in c above i mark ii the optimum pH value for enzyme 3 mark State one variable that may lead to the change in the optimum rate of product-formationof the two enzymes. 1 mar Suggest with a reason, the likely part of the human alimentary canal where enzyme H would be found, 2 marks Kenya Certificate of Secondary Education, 2019229193039Giving examples, describe the following interactions among organisms: predator-prey symbiosis parasitism, Explain the effect of increased physical activity on the following organ systems: heart lungs kidneys skin, Kenya Certificate of Secondary Education, 201923172 20 marks 20 marks Turn over.


Figure Gooe oonat osot Tooot Toons eet Record the voltmeter reading E, when the crocodile clips are connected together a ots or Open the switch and separate the crocodile clips. Indicate by ticking below.the range ofthe vollmeter usedo-wv TJ o-sv GE onyGi Now connect the crocodile clips across resistance R 10000.Close the switchand record in table 2 the voltmeter reading V.Open the switch, Repeat the procedure in bi for other values of resistance R shown in the table Complete the table wi 2005306 7000 Grails onthe poi atte hot api arts Mr ur ae ota 0h wy page tL ais orm 705 the mile ofthe pags Determine the slope S ofthe graph.marks Daten he coment G gven that 5 mas From the graph determine mark Veuthe value of V when R 0o Ry the value of R when i Deemine Determine the slope ofthe graph ta pont X 52 em. F Determine the constant n given that n 525 Determine the constant given hat P You are provided with the following:voltmetertwo cells anda cell holder,swith,set of sx resistors each of resistance 10000.connecting wires,Determine the slope S ofthe graph. Determine the constant G given that G From the graph determine Vovthe value of V when R 0 Ny tenroth wim dae mark 1 mask Cm murks maria mares 2 marks 1 mark Umark More KCSE, KCPE, College and University Past Papers are available on http: www.kenyaplex.com.


NameIndex Number101 2 Candidate s SignatureENGLISHPaper 2 Date.............................. Comprehension, Literary Appreciation and Grammar Nov. 20162Vi hoursTHE KENYA NATIONAL EXAMINATIONS COUNCIL Kenya Certificate of Secondary EducationENGLISH Paper 22 Vi hoursInstructions to candidates a Write your name and index number in the spaces provided above. B Sign and write the date of the examination in the spaces provided above. C Answer all the questions in this question paper. D All your answers must be written in the spaces provided in this question paper. E This paper consists of 12 printed pages. Candidates should check the question paper to ascertain that all the pages are printed as indicated and that no questions are missing. G Candidates must answer the questions in English. For Examiner s Use OnlyQuestionMaximumScoreCandidate sScore415Total Score 2016 The Kenya National Examinations Councilfor free past papers visit: www.freekcsepastpapers.com2I hate to tell you this, but your kid is spoiled. Mine aren t much better. That, in essence, is the finding of a recent media poll. Most of us think most of our kids are overindulged, materialistic brats. I bring this issue up to talk about a controversial study that deals with corporal punishment spanking - and it has outraged those who oppose the practice while rearming those who support it. Dr. Diana Baumrind studied 164 families from the time their children were in pre-school until they reached their 20s. She found that most families used some form of corporal punishment. She further found that, contrary to what we have been told for years, giving a child a mild spanking defined as open-handed swats on the backside, arm or legs does not leave the child scared for life. Baumrind makes a distinction between the minor punishments practiced by most parents who spank and the harsher variants practiced by a tiny minority shaking and blows to the head or face, for example .For my money, there was always something spurious about the orthodoxy that assured us all corporal punishment, regardless of severity, was de facto abuse. Nevertheless, we bought into it, with the result being that parents who admitted to spanking were treated as primitive dolts and heaped with scorn. They were encouraged to negotiate with misbehaving children in order to nurture their self esteem. But the orthodoxy was wrong on several fronts.


She further found that, contrary to what we have been told for years, giving a child a mild spanking defined as open-handed swats on the backside, arm or legs does not leave the child scared for life. Baumrind makes a distinction between the minor punishments practiced by most parents who spank and the harsher variants practiced by a tiny minority shaking and blows to the head or face, for example .For my money, there was always something spurious about the orthodoxy that assured us all corporal punishment, regardless of severity, was de facto abuse. Nevertheless, we bought into it, with the result being that parents who admitted to spanking were treated as primitive dolts and heaped with scorn. They were encouraged to negotiate with misbehaving children in order to nurture their self esteem. But the orthodoxy was wrong on several fronts. In the first place, it is plainly ridiculous to equate a child who has been swatted on the butt with one who has been stomped, scalded or punched. In the second, the argument that reasonable corporal punishment leads inevitably to mental instability always seemed insupportable and has just been proved by Baumrind s study. Don t get me wrong, contrary to what its proponents sometimes claim, corporal punishment is not a panacea for misbehavior. Rearing a child requires not just discipline, but also humour, love and some luck. I have seen too many children behave with a sense of entitlement to believe it is. Heard too many teachers tell horror stories of dealing with kids from households where parents are not sovereign, adult authority not respected. So the pertinent question is not: to spank or not to spank? Rather, it is who s in charge here?Some folks think it s abuse when you swat a child s backside. But maybe, sometimes, it s abuse when you don t. Adapted from The Allyn Bacon Guide to Writing by John Ramage, John Bean and June Johnson. Boston: Longman, 2012 1 Read the passage below and then answer the questions that follow. 20 marks Kenva Certificate of Secondary Education, 2016for free past papers visit: www.freekcsepastpapers.com3 a What does the author mean when he says most of us think most of our kids areoverindulged, materialistic brats . 2 marks b According to the author, what is the effect of mild punishment?


Boston: Longman, 2012 1 Read the passage below and then answer the questions that follow. 20 marks Kenva Certificate of Secondary Education, 2016for free past papers visit: www.freekcsepastpapers.com3 a What does the author mean when he says most of us think most of our kids areoverindulged, materialistic brats . 2 marks b According to the author, what is the effect of mild punishment? 2 marks c What is the controversy in the passage? 3 marks d What are the two major findings of Dr. Diana Baumrind s study? 2 marks e What is the author s personal view about corporal punishment? 4 marks Kenya Certificate of Secondary Education, 2016for free past papers visit: www.freekcsepastpapers.com4 f Identify two other words that the author uses in the passage to mean mild corporalpunishment? 2 marks g Use two illustrations from the passage to explain the author s use of informal language. 3 marks h Explain the meaning of each of the following words as used in the passage. I materialistic 1 mark ii panacea 1 mark Kenya Certificate of Secondary Education, 2016for free past papers visit: www.freekcsepastpapers.comRead the excerpt below and then answer the questions that follow. 25 marks Brothers, people of Sakwa, we are pleased to welcome you to Yimbo. It is customary, because of the good dak between us, for you to marry our daughters and we yours. We are therefore more than neighbours, we have great wat between us because of the intermingling of blood though this has not occurred between our two lines so there is no danger of brother marrying sister - a great taboo. Since you are our brothers, we will not make things difficult for you. Here he stopped to take a sip of kong o and you could have heard the ants talk, so great was the silence. However, nobody was fooled by his sweet words. He continued, enjoying immensely the tension he was creating. Our daughter, Adoyo Obanda is a great beauty whose assets have been praised and sung by many a nyatiti singer from here to ChumbuKombit, from Sakwa to Loka Nam.


Since you are our brothers, we will not make things difficult for you. Here he stopped to take a sip of kong o and you could have heard the ants talk, so great was the silence. However, nobody was fooled by his sweet words. He continued, enjoying immensely the tension he was creating. Our daughter, Adoyo Obanda is a great beauty whose assets have been praised and sung by many a nyatiti singer from here to ChumbuKombit, from Sakwa to Loka Nam. She is as fleet as a gazelle and her flying feet have been incorporated into the sayings of our village so that mothers sending their daughters on errands tell them to run like Adoyo of the flying feet. She has been carefully brought up and has been taught all the requirements of Chik. She is very apt pupil, and will therefore not bring shame and ruin to her husband by improper conduct. Her antecedents are peerless for she can trace her bloodline clear to Ramogi our great father and her blood is pure for we have always taken care to marry correctly. She is also the eldest daughter of our great chief, a man whose fame is known throughout this land. After careful consultation, we have therefore decided that thirty head of cattle should be the proper bride price. Was that an inaudible gasp from someone at the back? Chief Owuor Kembo signaled to his uncle and the old man spoke. Brothers, people of Yimbo, we have listened with great care to what you have to say. Since the contract of marriage is a matter of great import, we wish to beg leave to consult with each other outside before we return our verdict. Feel free to do so, Aloo said magnanimously. They moved some distance away and Akoko watching from her mother s kitchen thought amusedly to herself, I should ask father to give me a piece of land to settle on because at this rate I shall never leave his house. Adapted from The River and the Source by Margaret A. Ogola. Nairobi: Focus Publishers, 2012 a What reasons had the old man given that had prompted the need for Chief OwourKembo to urgently seek a wife?


They moved some distance away and Akoko watching from her mother s kitchen thought amusedly to herself, I should ask father to give me a piece of land to settle on because at this rate I shall never leave his house. Adapted from The River and the Source by Margaret A. Ogola. Nairobi: Focus Publishers, 2012 a What reasons had the old man given that had prompted the need for Chief OwourKembo to urgently seek a wife? 3 marks Kenya Certificate of Secondary Education, 2016tni 7 Turnoverfor free past papers visit: www.freekcsepastpapers.com6 b It is customary, because of the good dak between us for you to marry our daughters and we yours. Identify two other customary practices on marriage in this community that are revealed in this excerpt. 2 marks c Explain the character traits of Chief Owuor Kembo and Aloo that emerge in this excerpt. 4 marks d What was the response of Chief Owuor Kembo s party on the bride price requested forby Aloo? 2 marks e In what circumstances was the thirty head of cattle referred to unfavourably later in the story when Akoko was married to Chief Owuor Kembo? 2 marks Kenya Certificate of Secondary Education, 2016for free past papers visit: www.freekcsepastpapers.com I should ask father to give me a piece of land to settle on because at this rate I shall never leave his house. I Why did Akoko say these words? 2 marks ii What do Akoko s words reveal about Chief Odero s character? 2 marks Since the contract of marriage is a matter of great import, we wish to beg leave to consult with each other outside before we return our verdict. I What is your view on the success of Akoko and Chief Kembo s marriage? 2 marks ii Identify and comment on one marriage you consider successful in The River and the Source. 2 marks Feel free to do so, Aloo said magnanimously. Rewrite in indirect speech.


2 marks Since the contract of marriage is a matter of great import, we wish to beg leave to consult with each other outside before we return our verdict. I What is your view on the success of Akoko and Chief Kembo s marriage? 2 marks ii Identify and comment on one marriage you consider successful in The River and the Source. 2 marks Feel free to do so, Aloo said magnanimously. Rewrite in indirect speech. 1 mark Kenya Certificate of Secondary Education, 2016 im ? Turn overfor free past papers visit: www.freekcsepastpapers.comExplain the meaning of the following words as used in the excerpt, i errands 1 mark ii apt 1 mark iii import 1 mark Kenya Certificate of Secondary Education, 2016for free past papers visit: www.freekcsepastpapers.com9The Road Not TakenTwo roads diverged in a yellow wood,And sorry I could not travel both And be one traveler, long I stood And looked down one as far as I could To where it bent in the undergrowth;Then took the other, as just as fair,And having perhaps the better claim,Because it was grassy and wanted wear;Though as for that the passing there Had worn them really about the same,And both that morning equally lay In leaves no step had trodden black. Oh, I kept the first for another day!Yet knowing how way leads on to way,I doubted if I should ever come back. I shall be telling this with a sigh Somewhere ages and ages hence:Two roads diverged in a wood, and I - I took the one less travelled by,And that has made all the difference. By Robert Frost Adapted from Understanding Poetry by Jim Reeves London: Heinemann, 1965 3 Read the poem below and then answer the questions that follow. J t - r . A Explain the meaning of the poem. 4 marks b Explain the meaning of the line Yet knowing how way leads on to way. 2 marks Kenya Certificate of Secondary Education, 2016 ai6mi i m 2Turn overfor free past papers visit: www.freekcsepastpapers.comExplain the meaning of the following words as used in the excerpt, i errands 1 mark ii apt 1 mark iii import 1 mark Kenya Certificate of Secondary Education, 2016 101 2for free past papers visit: www.freekcsepastpapers.com9The Road Not TakenTwo roads diverged in a yellow wood,And sorry I could not travel both And be one traveler, long I stood And looked down one as far as I could To where it bent in the undergrowth;Then took the other, as just as fair,And having perhaps the better claim,Because it was grassy and wanted wear;Though as for that the passing there Had worn them really about the same,And both that morning equally lay In leaves no step had trodden black. Oh, I kept the first for another day!Yet knowing how way leads on to way,I doubted if I should ever come back. I shall be telling this with a sigh Somewhere ages and ages hence:Two roads diverged in a wood, and I - I took the one less travelled by,And that has made all the difference. By Robert Frost I!


2 marks Feel free to do so, Aloo said magnanimously. Rewrite in indirect speech. 1 mark Kenya Certificate of Secondary Education, 2016 im ? Turn overfor free past papers visit: www.freekcsepastpapers.comExplain the meaning of the following words as used in the excerpt, i errands 1 mark ii apt 1 mark iii import 1 mark Kenya Certificate of Secondary Education, 2016for free past papers visit: www.freekcsepastpapers.com9The Road Not TakenTwo roads diverged in a yellow wood,And sorry I could not travel both And be one traveler, long I stood And looked down one as far as I could To where it bent in the undergrowth;Then took the other, as just as fair,And having perhaps the better claim,Because it was grassy and wanted wear;Though as for that the passing there Had worn them really about the same,And both that morning equally lay In leaves no step had trodden black. Oh, I kept the first for another day!Yet knowing how way leads on to way,I doubted if I should ever come back. I shall be telling this with a sigh Somewhere ages and ages hence:Two roads diverged in a wood, and I - I took the one less travelled by,And that has made all the difference. By Robert Frost Adapted from Understanding Poetry by Jim Reeves London: Heinemann, 1965 3 Read the poem below and then answer the questions that follow. J t - r . A Explain the meaning of the poem. 4 marks b Explain the meaning of the line Yet knowing how way leads on to way. 2 marks Kenya Certificate of Secondary Education, 2016 ai6mi i m 2Turn overfor free past papers visit: www.freekcsepastpapers.comExplain the meaning of the following words as used in the excerpt, i errands 1 mark ii apt 1 mark iii import 1 mark Kenya Certificate of Secondary Education, 2016 101 2for free past papers visit: www.freekcsepastpapers.com9The Road Not TakenTwo roads diverged in a yellow wood,And sorry I could not travel both And be one traveler, long I stood And looked down one as far as I could To where it bent in the undergrowth;Then took the other, as just as fair,And having perhaps the better claim,Because it was grassy and wanted wear;Though as for that the passing there Had worn them really about the same,And both that morning equally lay In leaves no step had trodden black. Oh, I kept the first for another day!Yet knowing how way leads on to way,I doubted if I should ever come back. I shall be telling this with a sigh Somewhere ages and ages hence:Two roads diverged in a wood, and I - I took the one less travelled by,And that has made all the difference. By Robert Frost I! IM Adapted from Understanding Poetry by Jim Reeves London: Heinemann, 1965 3 Read the poem below and then answer the questions that follow. A Explain the meaning of the poem. 4 marks b Explain the meaning of the line Yet knowing how way leads on to way. 2 marks r 1 c r 1 1Kenya Certificate of Secondary Education, 2016m m Turnoverfor free past papers visit: www.freekcsepastpapers.com10 c Identify and explain the use of symbolism in the poem.


Rewrite in indirect speech. 1 mark Kenya Certificate of Secondary Education, 2016 im ? Turn overfor free past papers visit: www.freekcsepastpapers.comExplain the meaning of the following words as used in the excerpt, i errands 1 mark ii apt 1 mark iii import 1 mark Kenya Certificate of Secondary Education, 2016for free past papers visit: www.freekcsepastpapers.com9The Road Not TakenTwo roads diverged in a yellow wood,And sorry I could not travel both And be one traveler, long I stood And looked down one as far as I could To where it bent in the undergrowth;Then took the other, as just as fair,And having perhaps the better claim,Because it was grassy and wanted wear;Though as for that the passing there Had worn them really about the same,And both that morning equally lay In leaves no step had trodden black. Oh, I kept the first for another day!Yet knowing how way leads on to way,I doubted if I should ever come back. I shall be telling this with a sigh Somewhere ages and ages hence:Two roads diverged in a wood, and I - I took the one less travelled by,And that has made all the difference. By Robert Frost Adapted from Understanding Poetry by Jim Reeves London: Heinemann, 1965 3 Read the poem below and then answer the questions that follow. J t - r . A Explain the meaning of the poem. 4 marks b Explain the meaning of the line Yet knowing how way leads on to way. 2 marks Kenya Certificate of Secondary Education, 2016 ai6mi i m 2Turn overfor free past papers visit: www.freekcsepastpapers.comExplain the meaning of the following words as used in the excerpt, i errands 1 mark ii apt 1 mark iii import 1 mark Kenya Certificate of Secondary Education, 2016 101 2for free past papers visit: www.freekcsepastpapers.com9The Road Not TakenTwo roads diverged in a yellow wood,And sorry I could not travel both And be one traveler, long I stood And looked down one as far as I could To where it bent in the undergrowth;Then took the other, as just as fair,And having perhaps the better claim,Because it was grassy and wanted wear;Though as for that the passing there Had worn them really about the same,And both that morning equally lay In leaves no step had trodden black. Oh, I kept the first for another day!Yet knowing how way leads on to way,I doubted if I should ever come back. I shall be telling this with a sigh Somewhere ages and ages hence:Two roads diverged in a wood, and I - I took the one less travelled by,And that has made all the difference. By Robert Frost I! IM Adapted from Understanding Poetry by Jim Reeves London: Heinemann, 1965 3 Read the poem below and then answer the questions that follow. A Explain the meaning of the poem. 4 marks b Explain the meaning of the line Yet knowing how way leads on to way. 2 marks r 1 c r 1 1Kenya Certificate of Secondary Education, 2016m m Turnoverfor free past papers visit: www.freekcsepastpapers.com10 c Identify and explain the use of symbolism in the poem. 3 marks d What does the poet means when he says that I took the one less travelled by ?


1 mark Kenya Certificate of Secondary Education, 2016 im ? Turn overfor free past papers visit: www.freekcsepastpapers.comExplain the meaning of the following words as used in the excerpt, i errands 1 mark ii apt 1 mark iii import 1 mark Kenya Certificate of Secondary Education, 2016for free past papers visit: www.freekcsepastpapers.com9The Road Not TakenTwo roads diverged in a yellow wood,And sorry I could not travel both And be one traveler, long I stood And looked down one as far as I could To where it bent in the undergrowth;Then took the other, as just as fair,And having perhaps the better claim,Because it was grassy and wanted wear;Though as for that the passing there Had worn them really about the same,And both that morning equally lay In leaves no step had trodden black. Oh, I kept the first for another day!Yet knowing how way leads on to way,I doubted if I should ever come back. I shall be telling this with a sigh Somewhere ages and ages hence:Two roads diverged in a wood, and I - I took the one less travelled by,And that has made all the difference. By Robert Frost Adapted from Understanding Poetry by Jim Reeves London: Heinemann, 1965 3 Read the poem below and then answer the questions that follow. J t - r . A Explain the meaning of the poem. 4 marks b Explain the meaning of the line Yet knowing how way leads on to way. 2 marks Kenya Certificate of Secondary Education, 2016 ai6mi i m 2Turn overfor free past papers visit: www.freekcsepastpapers.comExplain the meaning of the following words as used in the excerpt, i errands 1 mark ii apt 1 mark iii import 1 mark Kenya Certificate of Secondary Education, 2016 101 2for free past papers visit: www.freekcsepastpapers.com9The Road Not TakenTwo roads diverged in a yellow wood,And sorry I could not travel both And be one traveler, long I stood And looked down one as far as I could To where it bent in the undergrowth;Then took the other, as just as fair,And having perhaps the better claim,Because it was grassy and wanted wear;Though as for that the passing there Had worn them really about the same,And both that morning equally lay In leaves no step had trodden black. Oh, I kept the first for another day!Yet knowing how way leads on to way,I doubted if I should ever come back. I shall be telling this with a sigh Somewhere ages and ages hence:Two roads diverged in a wood, and I - I took the one less travelled by,And that has made all the difference. By Robert Frost I! IM Adapted from Understanding Poetry by Jim Reeves London: Heinemann, 1965 3 Read the poem below and then answer the questions that follow. A Explain the meaning of the poem. 4 marks b Explain the meaning of the line Yet knowing how way leads on to way. 2 marks r 1 c r 1 1Kenya Certificate of Secondary Education, 2016m m Turnoverfor free past papers visit: www.freekcsepastpapers.com10 c Identify and explain the use of symbolism in the poem. 3 marks d What does the poet means when he says that I took the one less travelled by ? 3 marks e What does the poem reveal about the character of the persona?


IM Adapted from Understanding Poetry by Jim Reeves London: Heinemann, 1965 3 Read the poem below and then answer the questions that follow. A Explain the meaning of the poem. 4 marks b Explain the meaning of the line Yet knowing how way leads on to way. 2 marks r 1 c r 1 1Kenya Certificate of Secondary Education, 2016m m Turnoverfor free past papers visit: www.freekcsepastpapers.com10 c Identify and explain the use of symbolism in the poem. 3 marks d What does the poet means when he says that I took the one less travelled by ? 3 marks e What does the poem reveal about the character of the persona? 3 marks f What is the tone of the poem? 3 marks g Explain the meaning of the following words as used in the poem. I diverged 1 mark ii sigh 1 mark Kenya Certificate of Secondary Education, 20167 1 7 n 1 S f i 1for free past papers visit: www.freekcsepastpapers.com114 a Rewrite each of the sentences below to make it communicate more sensibly. 3 marks i Powerful and comfortable the buyer really liked the car. Ii They left the field full of sweat. Iii Mukasa loves growing vegetables. B Insert the correct punctuation marks in the sentences given. 4 marks i Whose responsibility is it to see whether this machine is working ii My one big question however is what you do with your free time iii Amazing That was the best party I have attended in years. Iv Please tell me the way to the police station c Complete each of the following sentences using the correct phrasal verb formed from theword given in brackets. 4 marks i Kimeto................................of the marathon race due to fatigue, pull ii The local council fire brigade........................the fire after many hours, put iii It is clear from her looks that Claire................................her mother, take iv The youth should.............................................to adults for guidance, look Kenya Certificate of Secondary Education, 2016for free past papers visit: www.freekcsepastpapers.com d Rewrite the following sentences according to the instructions after each.


3 marks i Powerful and comfortable the buyer really liked the car. Ii They left the field full of sweat. Iii Mukasa loves growing vegetables. B Insert the correct punctuation marks in the sentences given. 4 marks i Whose responsibility is it to see whether this machine is working ii My one big question however is what you do with your free time iii Amazing That was the best party I have attended in years. Iv Please tell me the way to the police station c Complete each of the following sentences using the correct phrasal verb formed from theword given in brackets. 4 marks i Kimeto................................of the marathon race due to fatigue, pull ii The local council fire brigade........................the fire after many hours, put iii It is clear from her looks that Claire................................her mother, take iv The youth should.............................................to adults for guidance, look Kenya Certificate of Secondary Education, 2016for free past papers visit: www.freekcsepastpapers.com d Rewrite the following sentences according to the instructions after each. 4 marks i It was tough but we eventually made it up the mountain. Begin: Tough..... ii Rashidi said that he had not insulted me. Use.......denied..... iii She is busy renovating her house so that she may rent it out. Rewrite using: with a view iv Mshamba will not at any cost support your cause. Begin: A t..... THIS IS THE LAST PRINTED PAGE.Kenya Certificate of Secondary Education, 2016for free past papers visit: www.freekcsepastpapers.com.


Www.freekcsepastpapers.comPage 289 IMENTI SOUTH EXAMINATION, 2023 Kenya Certificate of Secondary Education 232 1 PHYSICS PAPER 1 TIME: 2 Hours SECTION A: 25 marks Answer all the questions in this section 1.The figure below shows a section of a tape measure used for measuring the circumference of a cylindrical watertank.i State the accuracy of the tape. 1 mark ii Determine the diameter of the tank. 2 marks 2.A student carried out an experiment and recorded the following measurementsHeight of the rod 160cm Length of the shadow of flag post 1400cm Length of the shadow of rod 140cm Use the above measurements to estimate the height of the flag post. 3 marks 3.Sketch a displacement time graph for a body moving with a uniform velocity. 2 marks 4.A student wearing a sharp pointed shoe is likely to damage a soft wooden floor. Explain. 2 marks 5.The figure below shows a simple apparatus for demonstrating expansion in solids. It consists of a metal ball thatjust slips through the metal ring when both are at room temperature. Wooden handleMetal ballMetal ringExplain how the apparatus can be used to show that solids expand when heated. 3 marks 6.The figure below shows a solid marble in a stable equilibrium. On the space provided sketch the same marble in aneutral state of equilibrium. 1 mark MarbleBowlSupport7.a State the Bernoulli s principle. 1 mark b The figure below shows a Bunsen burner. String 90 1m 2m 10 20 30 40 50 60 70 80 90 10 20 30 40 50 60www.freekcsepastpapers.com Page 291 14. The diagram below shows a set up that a student used to investigate the pressure law. HeatDry airGlass flaskStirrerYXHot water a Name the parts X 1 mark Y 1 mark b What are the functions of i The stirrer 1 mark ii Part Y 1 mark c State the measurements that should be taken in the experiment. 2 marks d Explain how the measurement in c above may be used to verify pressure law.


1. The diagram below shows a motorist looking into his driving mirror. Mirror i Mark on the diagram: Letter I to show the incident ray and letter r to show the angle of reflection. 2 marks ii Name the dotted line shown in the diagram. 1 mark 2. A pendulum bob takes 0.05 seconds to move from its mean position to maximum displacement. Calculate its frequency. 2 marks 3. Describe how you would charge a gold leaf electroscope by induction method. 2 marks 4. State any two maintenance practices for accumulators. 2 marks 5. A man standing at the middle of two parallel walls fires a gun. He hears an echo after 1.5 seconds. Determine the distance of separation of the walls. Velocity of sound is 340 m s 3 marks 6. The figure below shows a candle flame being deflected by a positively charged sharp wire brought near it. Vely charged wireDeflected candle flame Explain the observation. 2 marks 7. The figure below shows part of electric cooker coil. Y i Why is the material labelled Y coiled? 1 mark ii State the property of material Y that makes it suitable for its use. 1 mark www.freekcsepastpapers.com Page 293 8. The figure below shows part of a rainbow. AB State what happens at part A 1 mark B 1 mark 9. One method of magnetization is by single stroking. State the disadvantage of this method. 1 mark 10. The figure below shows human eye with a defect. ImageEye ballEye lensObject i Identify the defect. 1 mark ii State one possible cause of the defect. 1 mark iii Identify the lens used to correct the defect. 1 mark 11. The sketch below shows an object placed some distance from a biconcave lens. FObject Draw rays to locate the image on the diagram. 3 marks SECTION B 55 MARKS Answer All questions 12. A The figure below shows a simple electric bell circuit. XGongHammerYZSpringSwitchwww.freekcsepastpapers.com Page 294 i Name the parts labelled X, Y, Z 3 marks ii When the switch is closed, the hammer hits the gong repeatedly. Explain why: I.


A The figure below shows a simple electric bell circuit. XGongHammerYZSpringSwitchwww.freekcsepastpapers.com Page 294 i Name the parts labelled X, Y, Z 3 marks ii When the switch is closed, the hammer hits the gong repeatedly. Explain why: I. The hammer hits the gong. 2 marks II. The hammer hits the gong repeatedly. 2 marks iii State and explain what would happen if the armature is made of steel metal. 2 marks iv What adjustment should be done to the system to make it operate effectively with a lower voltage battery? 1 mark 13. A State one use of echoes. 1 mark b i Explain why there is gradual decrease in amplitude of a progressive wave. 1 mark ii Distinguish between refraction and reflection of waves. 1 mark iii In the figure below complete the diagram to show how plane wave move in the shallow and deep region below. 2 marks DeepShallowDeep iv The figure below shows how water waves interfere in a ripple tank. The amplitude and wavelength of each wave is 8cm and 5 cm respectively. ABCDOS15cm5cmS2 Determine the amplitude of the water wave at: A 1 mark B 1 mark v If the vibrator S1 and S2 in part iv above produces coherent waves at a frequency of 40Hz, determine the speed of water wave. 2 marks c A radio station transmits a wave frequency of 120MHz. Calculate i The wavelength of the transmitted waves. 2 marks ii Time taken for the waves to travel a distance of 50km. 2 marks 14. The figure below shows a simple circuit consisting of resistor networks and a power source of internal resistance of 0.6 ohms a Calculate i The total effective resistance. 3 marks ii Current flowing through the 3 resistor. 3 marks 6 1 3 12V, 0.6 www.freekcsepastpapers.com Page 295 b Two capacitors of values 3 F and 6 F connected in series to a 120V d.c supply as shown below. I Calculate the total energy stored in the capacitor.


3 marks ii Current flowing through the 3 resistor. 3 marks 6 1 3 12V, 0.6 www.freekcsepastpapers.com Page 295 b Two capacitors of values 3 F and 6 F connected in series to a 120V d.c supply as shown below. I Calculate the total energy stored in the capacitor. 3 marks ii The capacitors are then reconnected in parallel. Determine I. Potential difference across each capacitor. 1 mark II. Total energy stored in both capacitors. 3 marks iii Comment of the energy difference in I and II above. 3 marks 15. A State the Snell s law of refraction. 1 mark b In an experiment to determine refractive index of a liquid, the liquid was poured into a measuring cylinder, a pin was placed at the bottom of the cylinder and another pin was used to locate the apparent position of the first pin. The values of real and apparent depth were used to plot a graph as shown below. I From the graph determine the refractive index of the liquid. 3 marks ii Given that the velocity of light in vacuum is 3.0 x 108m s, what would be the velocity of light in the liquid above? 3 marks 16. A i Define the term principal focus as used in convex lens. 1 mark ii State two differences between the human eye and camera 2 marks b An object is placed 20cm in front of a concave lens of focal length 16cm. Determine i The image distance from the lens. 3 marks ii The magnification. 3 marks 6 F 3 Fwww.freekcsepastpapers.com Page 296 IMENTI SOUTH EXAMINATION, 2023 Kenya Certificate of Secondary Education 232 3 PHYSICS PAPER 3 PRACTICAL TIME: 2 HOURS QUESTION ONE You are provided with the following A concave lens A lit candle A white screen A lens holder A metre rule Procedure a Set the apparatus as shown below. B Place a lit candle at object distance u 20cm.


3 marks ii The magnification. 3 marks 6 F 3 Fwww.freekcsepastpapers.com Page 296 IMENTI SOUTH EXAMINATION, 2023 Kenya Certificate of Secondary Education 232 3 PHYSICS PAPER 3 PRACTICAL TIME: 2 HOURS QUESTION ONE You are provided with the following A concave lens A lit candle A white screen A lens holder A metre rule Procedure a Set the apparatus as shown below. B Place a lit candle at object distance u 20cm. Move the screen towards or away from the lens until a sharp image of the candle flame is obtained on the screen. Measure the distance V and record the results in the table. C Repeat the same for other values of U as shown in the table and fill their respective values of V. Object distance U cm Image distance V cm U V cm UV cm2 20 30 45 60 75 90 5 marks d Plot a graph of UV cm2 against U V cm on the grid provided. 5 marks e Determine the slope of the graph. 2 marks f Determine the power of the lens used in the experiment. 2 marks QUESTION TWO You are provided with the following 2 new dry cells A cell holder Switch A resistance wire mounted on a mm scale Six connecting wires each with a crocodile clip at one end An ammeter A voltmeter Micrometer screw gauge Procedure a Measure the diameter of the mounted wire at two distinct points. D1 mm mark d2 mm mark Average diameter 1 mark U cm V cm Convex lens White screen Candlewww.freekcsepastpapers.com Page 297 b Connect the circuit as shown below. VA i Close the switch and measure the p.d, Vo across the 1M length of resistance wire and current Io. Vo V 1 mark Io A 1 mark ii Calculate the resistance Ro of the wire. 2 marks iii Calculate the cross-section area A of the wire in S.I units.


All working must be clearly shown. Electronic calculators, mathematical tables may be used. All numerical answers should be expressed in the decimal notations. You may use g as 10m s2 SECTION A 25 MARKS 1. Figure 1, shows a Vernier caliper of zero error 0.02 cm being used for measuring the diameter of a cylindrical container of height 10 cm. The scale reading of the Vernier is as shown alongside. A. Determine the diameter of the container 2 marks b. Estimate the volume of a liquid which can completely fill the container 2 marks 2. State one factor that affects the turning effect of a force on a body. 1 mark 3. Figure 2 shows some air trapped by mercury in a glass tube. The tube is inverted in a dish containing mercury. Given that the atmospheric pressure is 760 mmHg and the height of mercury column in the tube is 600 mm, determine the pressure of the air trapped in the tube in mmHg. 2 marks 4. Figure 3 shows drops of mercury and water on a glass surface, Explain the difference in the shapes of the drops. 2marks Figure 1 5. A ball is thrown from the top of a cliff 20m high with a horizontal velocity of 10ms-1. Calculate the distance from the foot of the cliff to where the ball strikes the ground. 3 marks Mercury Water Glass surfacewww.freekcsepastpapers.comPage 271 A B thread 6. Explain one advantage of mercury over alcohol as a thermometric liquid. 1mark 7. A body of mass M is allowed to slide down an inclined plane. State two factors that affect its final velocity at the bottom of the inclined plane. 2marks 8. A stopwatch reads 08:10:84 and 09:10: 90 before and after an experiment respectively. Determine the duration of the event in SI units. 2marks 9. Explain the meaning of thermodynamics as a branch of physics. 1 mark 10. A. State the Hooke s Law. 1mark b. Figure 4 shows identical spiral springs supporting a load of 90N.


State the Hooke s Law. 1mark b. Figure 4 shows identical spiral springs supporting a load of 90N. Each spring has a spring constant k 200N m 90Nsprings Determine the total extension of the system take the weight of the cross bars and springs to be negligible 2 marks 11. Figure 5 shows a rectangular loop with a thin thread loosely tied and dipped into a soap solution. Draw on the space provided what is observed when point A is punctured. 1mark 12. Two horizontal strings are attached to a block, resting on a frictionless surface, as shown in figure 6. A force of 100N pulls on one string. The block does not move. Find the value of the force, F on the other string. 1 mark 13. A wooden bench feels neither warm nor cold when touched by your bare hands. Explain this observation. 2 marks F 100 N supportwww.freekcsepastpapers.comPage 272 SECTION B 55 MARKS 14. A State the principle of conservation of linear momentum. 1 mark b Distinguish between elastic and inelastic collision. 1 mark c A striker kicks a ball of mass 200g initially at rest with a force of 78N.Given that the foot was in contact with the ball for 0.30s; determine the takeoff velocity of the ball. 3 marks d A high jumper usually lands on thick soft mattress. Explain how the mattress helps in reducing the force of impact. 2 marks e A ball is thrown horizontally from the top of a vertical tower of height 75m and strikes the ground at a point 80m from the bottom of the tower. Determine the: i Time taken by the ball to hit the ground. Acceleration due to gravity 10m s2 3 marks ii Initial horizontal velocity of the ball. 3 marks 15. A State two factors that affect the boiling point of a liquid 2 marks b 100g of a liquid at a temperature of 100 C is poured into a well lagged calorimeter. An electric heater rated 50W is used to heat the liquid. The graph in figure 7 shows the variation of the temperature of the liquid with time.


Take: Speed of light in vacuum C 3.0 x 108m s Acceleration due to gravity g 10N S2 SECTION A 25 MARKS Answer all the questions in the spaces provided. 1. Figure 1 below shows a ray of light incident to the first of the two mirrors placed at an angle of 600 fig 1 Complete the path of the ray after reflection from the mirrors. 1mk 2. Figure 2 below shows a positive charge near a plate carrying negative charge. Fig 2 Draw the electric field between them. 2mks 3. Two pins are hanging from a magnet as shown in the diagram below figure 3 fig 3 Explain why they do not hang vertically downwards. 2mks 4. Draw the diagrams to illustrate what happens when plane waves are incident on a slit. I When the width of the slit is large compared with the wavelengths of the waves. 2mks ii When the width of the slit is small compared with wavelength of the waves. 2mks 5. What energy conversion occurs in a photocell? 1mk 6. I Arrange the following waves in order of decreasing wavelength; infrared, X-rays, micro-waves and visible light 1mk ii State one application of visible light. 1mk 7. State two advantages of an alkaline battery over lead acid battery. 2mks 8. A girl shouts and ears an echo after 0.6 seconds later from a cliff. If velocity of sound is 330m s, calculate the distance between her and the cliff. 3mks 9. What is dispersion of light? 1mk www.freekcsepastpapers.comPage 275 10. Determine the reading of an ammeter in figure 4 below 2mks fig 4 11. A ray of light is incident on a glass oil interface as shown in figure 5 below. Determine the value of r Take refractive index of glass and oil as 3 2 and 6 3 respectively 3mks fig 5 12. State two factors that affect the capacitance of a parallel plate capacitors. 2mks SECTION B 55 MARKS 13. A State Ohm s law.


2mks b A ray of light traveling in the direction EO in air enters a rectangular block as shown in the diagram. The resulting angle of refraction is 18 . Find: i The refractive index of the block. 2mks ii The critical angle C of the block. 3mks 16. A The figure below shows an object in front of lens. I Using rays locate the image as seen by observer, E. 2 mks ii Give one application of such a lens as used above. 1 mk 18o Cwww.freekcsepastpapers.comPage 277 b Figure below shows a diagram of the human eye. Sketch a ray diagram showing how lens is used to correct long sightedness. 2 mks c An object of height 10.5cm stands before a diverging lens of focal length 20cm and a distance of 10cm from the lens. Determine; i image distance. 3 mks ii height of the image. 3mk iii magnification. 2 mk 17. A State the Lenz s law of electromagnetic induction. 1 mk b A bar magnet is moved into a coil of an insulated copper wire connected to a zero centre galvanometer as shown below i Show on the figure above the direction of the induced current in the coil 1 mark ii State and explain what is observed on the galvanometer when the south pole of the magnet is moved into and then withdrawn from the coil. 2 marks c A transformer has 800 turns in the primary and 40 turns in the secondary winding. The alternating voltage connected to the primary is 240V and current of 0.5.A. If 10 of the power is dissipated as heat within the transformer, determine the current in the secondary coil.


2 marks c A transformer has 800 turns in the primary and 40 turns in the secondary winding. The alternating voltage connected to the primary is 240V and current of 0.5.A. If 10 of the power is dissipated as heat within the transformer, determine the current in the secondary coil. 3 marks N Gwww.freekcsepastpapers.comPage 278 CHOGORIA - MURUGI JOINT EXAMINATION, 2023 Kenya Certificate to Secondary Education 232 3 PHYSICS PAPER 3 CONFIDENTIAL Question 1 Each candidate to have the following apparatus 2 new dry cells Cell holder Ammeter 0-1A Voltmeter 6 connecting wires at least 3 with crocodile clips Nichrome wire SWG 28 d 0.38mm mounted on a mm scale with the ends labeled A and B A switch Micrometer screw gauge may be shared Jockey key. Question 2 PART A Each candidate to have the following apparatus Retort stand, clamp and boss A piece of thread 1.2 metre Two small pieces of wood blocks Pendulum bob Meter rule Stop watch PART B Each candidate to have the following apparatus A concave mirror Focal length 16 cm Mirror holder White screen Metre rule A candlewww.freekcsepastpapers.comPage 279 CHOGORIA -MURUGI JOINT EXAMINATION, 2023 Kenya Certificate to Secondary Education 232 3 PHYSICS Paper 3 Practical TIME: 2 HRS Answer all the questions. You are supposed to spend the first 15 minutes of the 2 hours allowed for this paper reading the whole paper carefully before your start. QUESTION ONE. You are provided with the following; 2 new dry cells Cell holder Ammeter 0-1A Voltmeter 6 connecting wires at least 3 with crocodile clips Nichrome wire mounted on millimeter scale Micrometer screw gauge may be shared Jockey. Proceed as follows; a Using micrometer screw gauge, measure the diameter, D of the nichrome wire.


QUESTION ONE. You are provided with the following; 2 new dry cells Cell holder Ammeter 0-1A Voltmeter 6 connecting wires at least 3 with crocodile clips Nichrome wire mounted on millimeter scale Micrometer screw gauge may be shared Jockey. Proceed as follows; a Using micrometer screw gauge, measure the diameter, D of the nichrome wire. I D mm ii D m 1mark iii The cross sectional area A is obtained by; 2 Where r D 2 Determine the cross sectional area A in SI units. 2marks b Set up the apparatus as shown below. C Record the e.m.f across the terminals of the dry cells when the switch is open. Emf d Adjust the position of jockey key such that length AX 10cm. Close the switch and record the voltmeter and ammeter reading on the table given. E Repeat step d above for the other lengths shown on the table. Www.freekcsepastpapers.comPage 280 f Complete the table. 5 marks Length, L AX cm 10 20 30 50 70 80 Voltage V Current A Resistance V I g Plot a graph of resistance against Length cm on the graph provided below. 5 marks h i Determine the slope of your graph. 3marks ii The relationship between L and R is given by the equation; , determine the value of . 2marks iii Suggest what constant represents. 1mark QUESTION TWO A You are provided with the following apparatus; Retort stand, clamp and boss A piece of thread Two small pieces of wood blocks Pendulum bob Meter rule Stop watch Procedure; Tie the bob to one end 20cm length of the thread and suspend it from the retort stand with the help of the wooden blocks as shown in the diagram. Displace the bob by a small angle say 100; start the stopwatch simultaneously and allow it to swing to make ten oscillations.


When an inflated balloon is placed in a refrigerator, it is noted that its volume reduces. Use kinetic theory to explain this observation 2 marks 7. The figure below shows a solid just before being released into a liquid of the same density as the solid. On the same diagram draw the observation made when the solid is released 1 mark 8. The figure below shows a glass tumbler partly filled with water at room temperature. Briefly explain what happens to the stability of the tumbler when the water is heated 2 marks 9. The figure below shows some air trapped in a glass tube, the tube is inverted in a dish containing mercury. Given that the atmospheric pressure is 760 mmHg and the height of mercury column in the glass is 550 mm determine the pressure of the air trapped in the tube in mm Hg. 2 marks www.freekcsepastpapers.comPage 251 10. The figure below shows a hydraulic machine in equilibrium while supporting a load when a force of 100N is applied one of the pistons. The cross-section area of the pistons are as shown. Determine the weight of the load 3 marks 11. A metal ball suspended vertically with a light string of length 4m is displaced through an angle as shown in the diagram below. The body is released from A and swings past the lowest point B. Given that its velocity at point B is 4 m s, determine angle 3 marks 12. The figure below shows a uniform bar balanced by forces F1 and F2. Determine the value of F1 3 marks SECTION B 55 MARKS Answer ALL the questions in the spaces provided 13. A An object of mass 50g is dropped from a height of 80m to hit the ground below i For the motion, on the same axes, sketch and label the graphs of : 3 marks I. Kinetic energy against time II. Potential energy against time ii Determine how long it takes to reach the ground 2 marks iii Determine the momentum as it hits the ground 3 marks b Engine oil licks on the ground from a lorry as it decelerates uphill. The oil drops are shown below as black dots. The time between any two drops is constant at 2sec. I. On the same diagram indicate the direction of the lorry with an arrow. 1 mark ii.


I. On the same diagram indicate the direction of the lorry with an arrow. 1 mark ii. Determine the acceleration of the deceleration of the lorry. 3 marks www.freekcsepastpapers.comPage 252 14. The figure below shows a system used to lift a septic slab of weight 150N by applying a force of 50N on a light bar as shown. The radii of the pulley belt wheels are as indicated in the diagram Determine a. Tension T of the vertical string 3 marks b. MA of the system 2 marks c. VR of the system 3 marks d. Efficiency of the system 2 marks 15. A State three factors that affect the toughness of a spring 3 marks b When a mass of 120g is applied to a spring the pointer reads 6cm. A pan, in which a mass of 210g is placed, is now suspended from the spring and the pointer reads 14cm. When the 210g mass is removed from the pan the pointer reads 4cm. I. Draw a diagram or diagrams to represent the information above 1 mark ii. Determine the mass of the pan. 3 marks c The figure below shows a mass 200g placed on a frictionless surface and attached to a spring. The spring is compressed and released. Given that the elastic potential energy of the compressors spring is 2.7x10 2J. Determine the maximum speed with which the blocks moves after released. 3 marks 16. The sphere below has a volume of 0.1 litres. It is held with a tight string at the base with of its volume in liquid A of density 380kg m3 while the rest is in Liquid B of density 700kg m3. The tension of the string is 0.32N. www.freekcsepastpapers.comPage 253 Find: a. Mass of liquid A displaced 2 marks b. Mass of liquid B displaced 2 marks c. Upthrust experienced by the sphere 2 marks d. Mass of the sphere 3 marks e. Density of the sphere 3 marks 17. A girl joins two 20g masses A and B on a string and whirls them in a vertical circle Centre O of radius 50cm as shown below.


Mass of the sphere 3 marks e. Density of the sphere 3 marks 17. A girl joins two 20g masses A and B on a string and whirls them in a vertical circle Centre O of radius 50cm as shown below. The bodies maintained an angular velocity of 10 Rad-s Determine: a. The linear velocity of body A 2 marks b. Centripetal acceleration of Body B 2 marks c. The tension of the string i. T1 2 marks ii. T2 2 marks iii. T3 3 marks www.freekcsepastpapers.comPage 254 FORM IV CLUSTER EVALUATION, TRIAL 2, 2023 Kenya Certificate of Secondary Education 232 2 PHYSICS Paper 2 TERM 2, 2023 Time: 2 Hours SECTION A 25 MKS 1. A Figure 1 shows a ray of light incident on a plane mirror at point X. Complete the diagram indicating the angle of reflection. 2mks b State one characteristic of the image formed on plane mirror, 1mk 2. A Figure 2 shows a stationary charged rode X placed between two freely suspended charged rods, Y and Z. The charge on rod Z is indicated. Identify the type of charge on rods X and Y. 1mk b State one use of a charged gold leaf electroscope. 1mk 3. State the reason why current produced by a simple primary cell decreases rapidly when the cell is in use. 1mk 4. A State the reason why a freely suspended magnet always settles facing a particular direction. 1mk b Figure 3 shows poles of two bar magnets placed close to one another. Figure 3 Sketch the magnetic field pattern in the space between the poles. 1mk 5. Figure 4 shows the cross section of a conductor carrying some current and held between magnet field. Indicate using an arrow on the diagram the direction the conductor moves when released. 1mk www.freekcsepastpapers.comPage 255 6. A What is meant by the term echo? 1mk b Compare the speed of sound in air and in steel. 1mk c State one difference between stationary wave and progressive wave. 1mk 7. A State one difference sound waves and radio waves.


1mk c State one difference between stationary wave and progressive wave. 1mk 7. A State one difference sound waves and radio waves. 1mk b Figure 5 shows how displacement varies with distance of a certain wave. 1mk Figure 5 On the same diagram, indicate the wavelength of the wave using the symbol. 1mk 8. A State one characteristic of images formed by a concave mirror. 1mk b Figure 6 shows a concave mirror of focal length 10cm and an object O, placed 15cm infront of the mirror. Using a ray diagram, complete the diagram to locate the image, I, formed. 2mks 9. Figure 7 shows an immersion heater used to heat some water initially at 250C to boiling point. State two factors that determine the time taken for the water to boil. 2mks 10. A radioactive substance initially has a mass of 0.4g and decays to 0.05g in 75 minutes. Determine the half-life of the substance. 2mks 11. State one difference between X-rays and infrared waves. 1mk 12. Figure 8 a and b shows P n junctions, each connected to a cell and a lamp. Figure 8 It is observed that the bulb in a does not light while the bulb in b lights. Explain the reason for these observations. 2mks www.freekcsepastpapers.comPage 256 SECTION B 55 MARKS 13. A Define the term critical angle of a refracting media. 1mk b One of the conditions necessary for total internal reflection to occur is that the critical angle must be exceeded. State the other condition. 1mk c The figure below shows a ray of light travelling from air and through a prism made of glass of refractive index 1.7 i On the diagram show the critical angle. 1mk ii Determine the I. Critical angle 2mks II. Angle x and y 2mks 14. A Define the term Thermionic emission 1mk b The figure below shows the sketch of a cathode ray Oscilloscope. I Label the parts marked A and C.


A What quantity is represented by the values v u plotted on the vertical axis? 2mks b Determine the slope S of the graph. 1mk c Determine the x-intercept of the graph. 1mk d Given that ckvuv Determine the values of i k 1mk ii c 1mk 18. A Give one difference between x-rays and cathode rays. 1mk b The figure below shows a sketch of an x-ray tube. I Label the parts A, B and C. 3mks ii State the purpose of E and F. 1mk iii What physical characteristics are used to decide on the choice of C. 1mk b i State the function of the part labeled D. 1mk www.freekcsepastpapers.comPage 258 c Electrons from a cathode ray gun are accelerated in an X-ray tube by a potential of 10kV and used to produce X-rays. Only 0.5 of the electron energy converts into X-rays. Determine the i Maximum energy contained in the cathode electrons. 1mk ii Wavelength of the x-rays produced. 2mks Take h 6.62 x 10 34Js, C 3.0 x 108 m s 19. The figure below shows two capacitor plates held parallel to each other. A State and explain what happens to the capacitance of the plates if the top plate is moved as shown. 2mks b Show that if three capacitors in parallel have capacitances C1, C2 and C3, then the network capacitance is given as follows. CN C1 C2 C3 2mks c The figure below shows a network of capacitors. Determine the network capacitance. 2mks 20. A The figure below shows an experimental set-up consisting of a mounted lens L, a screen S, a metre rule and a candle. I Describe how the set-up may be used to determine the focal length, f, of the lens. 4mks ii State the reason why the set-up would not work if the lens was replaced with a diverging lens.


A The figure below shows an experimental set-up consisting of a mounted lens L, a screen S, a metre rule and a candle. I Describe how the set-up may be used to determine the focal length, f, of the lens. 4mks ii State the reason why the set-up would not work if the lens was replaced with a diverging lens. 1mk b An object placed 15cm from a convex lens is magnified two times. Determine the focal length of the lens. 3mks www.freekcsepastpapers.comPage 259 FORM IV CLUSTER EVALUATION, TRIAL 2, 2023 Kenya Certificate of Secondary Education 232 3 PHYSICS Paper 3 PRACTICAL CONFIDENTIAL Please provide the following for the physics practical paper. QUESTION 1 2 dry cells A cell holder A switch An ammeter with a scale range of 0-1A Six connecting wires Wire mounted on the metre rule labelled X SWG 28 or 0.37mm in diameter A micrometer screw gauge to be shared A Voltmeter QUESTION 2 - a metre rule - knife edge raised at least 20 cm above bench - one 50 g mass and one 100 g mass - a beaker or any container - 2 pieces of thread around 15 cm each - some water in a beaker - Liquid L in a beaker Paraffin - Some tissue paper. -. A triangular glass prism - A piece of soft board - Four optical pins - Four office pins - A sheet of plain paperwww.freekcsepastpapers.comPage 260 FORM IV CLUSTER EVALUATION, TRIAL 2, 2023 Kenya Certificate of Secondary Education 232 3 PHYSICS Paper 3 PRACTICAL Time: 2 Hours Instructions to candidates: You are supposed to spend the first 15 minutes of the 2 hours allowed for this paper reading the whole paper carefully before commencing your work. Marks are given for a clear record of the observation actually made, their suitability, accuracy and the use made of them. Candidates are advised to record their observations as soon as they are made Non-programmable silent electronic calculators may be used.


- A triangular glass prism - A piece of soft board - Four optical pins - Four office pins - A sheet of plain paperwww.freekcsepastpapers.comPage 260 FORM IV CLUSTER EVALUATION, TRIAL 2, 2023 Kenya Certificate of Secondary Education 232 3 PHYSICS Paper 3 PRACTICAL Time: 2 Hours Instructions to candidates: You are supposed to spend the first 15 minutes of the 2 hours allowed for this paper reading the whole paper carefully before commencing your work. Marks are given for a clear record of the observation actually made, their suitability, accuracy and the use made of them. Candidates are advised to record their observations as soon as they are made Non-programmable silent electronic calculators may be used. QUESTION 1 You are provided with the following: 2 dry cells A cell holder A switch An ammeter Five connecting wires Wire mounted on the metre rule labelled x A micrometer screw gauge to be shared A Voltmeter Proceed as follows a Measure the diameter of the wire three times and determine the average diameter, b D . M 2 marks c Determine the cross-section area of the wire, A . M2 1 mark d Connect the circuit as shown in the figure below. E Measure the voltage E from the Voltmeter, before closing the switch. E ................................ 1 mark f Adjust the length, of the wire to 0.2m, close the switch, S and read the value of current and record in the table below. Length, m 0.2 0.3 0.4 0.5 0.6 0.7 Current, I A 11 AI g Repeat the procedure in c above for the values of lengths given. 5 marks www.freekcsepastpapers.comPage 261 h Calculate the value of 1 and record in the table above. 1 mark i On the grid provided plot a graph of I1 y- axis against l 5 marks j Determine the gradient of the graph.