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Form 3 Chemistry Paper 1 Question Paper

Form 3 Chemistry Paper 1 

Course:Chemistry

Institution: Form 3 question papers

Exam Year:2016



NAME................
ADM NO..............
DATE................
INSTRUCTIONS
a)Answer all the questions
1.Explain how you would obtain solid calcium carbonate from a mixture of calcium carbonate and potassium carbonate powders (3mrks)
2.a)Write an equation for the reaction that takes place when carbon(II)oxide gas is passed over heated zinc(II)oxide.(1mrk)
b)State one use of carbon(II)oxide gas.(1mrk)
3.Describe how solid copper(II)sulphate,Sodium hydroxide solution and distilled water can be used to prepare copper(II)hydroxide,solid.(3mrks)
4.Aluminum metal is used for power overheated cables.State any two properties that make alluminium suitable for this use.(2mrks)
5.A given volume of ozone,(O3)diffused from a certain apparatus in 96 seconds.
Calculate the time taken by an equal volume of carbon(IV)oxide(CO2)to diffuse under the same conditions (O=16.O,C=12.0)(3mrks)
6.a)What is meant by isomerism?(1mrk)
b)Draw and name two isomers of C5H12.(2mrk)
7.Give two reasons why most laboratory apparatus are made of glass(2mrks)
8.Give two reasons non-luminous flame is preferred for heating in the laboratory to luminous flame.(2mrks)
9.Explain how you can obtain lead carbonate from a mixture of sodium carbonate and lead carbonate (3mrks)
10.A hydrated salt of iron has the following composition by mass.Iron 20.2%,sulphur 11.5%,oxygen 23.0%,and water 45.3%.Determine the formula of the hydrated salt. (3mrks).




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