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Form 3 Chemistry Paper 1 Sample Revision Questions With Answers

Form 3 Chemistry Paper 1 Sample Revision Questions With Answers

Lessons (20)

• 1.    Form one students wanted to prepare hydrogen gas in the laboratory. They reacted Zinc granules and dilute nitric (V) acid. a). Explain the observation made. b). State one use of hydrogen gas.
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• 2.    Explain the effect of hydrogen chloride on blue and red litmus papers when it is dissolved in water and in methylbenzene.
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• 3.    When a few drops of sodium hydroxide solution were added to a colorless test solution, a white precipitate was formed.When excess sodium hydroxide solution was added, the precipitate dissolved. Similar results were obtained with the test solution when aqueous ammonia was used. a).Identify the cation present in the test solution. b).Identify the precipitate formed with the few
  3m 4s

• 4.    Metal Z burns in air with a brilliant blinding white flame. One of the products formed dissolves in water to form an alkaline solution and a gas that turns a wet red litmus paper to blue. a).Identify i).The products formed when the metal Z burns in air. ii).The gas produced when the product formed dissolves in water. b). Write the equation for the
  2m 12s

• 5.    Solid P was strongly heated. A yellow solid when cold, a brown gas and a colorless gas that relights a glowing splint were formed. a).Identify i).Solid P ii).Yellow Solid b).Write a balanced chemical equation for the reaction that takes place on heating solid p.
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• 6.    A student accidentally mixed three solids: lead (II) sulphate, copper (II) oxide and Iron (III) chloride. Describe how you would obtain a solid lead (II) sulphate from the mixture.
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• 7.    Solid sodium chloride is a poor conductor of electricity while molten sodium chloride conducts. Explain.
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• 8.    Using dots and crosses, show the type of bonding in the following: i).Hydroxonium ion #(H_3 O^(+))# ii).Calcium chloride
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• 9.    Explain why the melting point of silicon (IV) oxide is much higher than that of sulphur (IV) oxide.
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• 10.    During the manufacture of sodium carbonate by the the Solvay there is a by -product produced which is not recycled. a).Write the equation for the formation of this by- product. b).State one of the uses of the product (a) above. c).State one use of the
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• 11.    a).What are allotropes? b). Identify the two main isotopes of chlorine. c). Name any two elements which exhibit allotropy.
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• 12.    State the roles of the following during the Frasch process. i).Superheated water. ii).Hot compressed air.
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• 13.    Write an equation for the reaction that takes place when hot concentrated sulphuric (VI) acid is reacted with carbon.
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• 14.    Study the flow diagram below answer the questions that follow
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• 15.    Comment on the atomic radii in period 3 elements.
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• 16.    (a) What is the role of the following parts during fractional distillation of a mixture of water and ethanol? (i) Fractionating column ii) Glass beads in the fractionating column b) .State any one application of
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• 17.    Name the process which takes place when: i).Iodine changes directly from solid to gas ii) #Fe^(2+)(aq)# changes to #Fe^(3+)(aq)# iii) White sugar changes to black solid when mixed with excess concentrated Sulphuric (VI) acid
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• 18.    The molar masses of gas U and V are 16.0 and 44.0 respectively. If the rate of diffusion of U through the porous material is #12cm^3#/s. Calculate the rate of diffusion of V through the same material.
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• 19.    An oxide of element P has the formula as #P_2O_3# a).State the valency of element ‘P’ b).In which group of the periodic table is the element.
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• 20.    Using equations, distinguish between the bleaching action of chlorine and Sulphur (IV) oxide.
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