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Kibugamu Two Joint Examination Chemistry Paper 1 Question Paper

Kibugamu Two Joint Examination Chemistry Paper 1

Course:Secondary Level

Exam Year:2012

1.Classify the following processes as either physical or Chemical change
Process
a)Heating of copper(¡¡) nitrate solid (1 mk)
b)Obtaining kerosine from crude oil (1 mk)
2.a) What are isotopes ?
b)Determine the relative atomic mass of Neon.If Neon-20 forms 90.92%, Neon-21 forms 0.2% and Neon-22forms 8.82% of total mass of agiven sample of neon gas.(2 mks)
4.Give two properties of air that make it amixture and not a compound (2 mks)
5.Draw the strctural formula the following compounds
¡) Ethane (1 mk)
¡¡)Ethanol (1 mk)
6.Calcium oxide is added to soil in certain areas.State the purpose. (1 mk)
7.Starting with Lead (¡¡) oxide solid describe how you would prepare asolid sample of Lead (¡¡) Chloride given the following:- (3 mks)
-Sodium chloride solid
-Dilute nitric (v) acid
-Distilled water
10.Name the crystalline forms of carbon (3 mks)
11.a) Explain observations made when amoist blue litmus paper is dropped into atest tube containing sulphur (¡v) oxide gas
b) Write an equation for the reaction between Sulphur (¡v) oxide and water (1 mk)
15.a) Write the chemical equation to show the reaction between the Aluminium oxide and the following substances
¡)Sodium hydroxide (
1 mk)
¡¡)Dilute hydrochloric acid (1 mk)
b) State the property of Aluminium oxide demonstrated above. 1mk)
16.a) Give two reasons why aBunsen burner is used in heating and not a candle. (1 mk)
b) Suggest why an electric heater is not suitable for use in a chemistry lab for general laboratory experiments (1 mk)
17.When solid magnesium carbonate was added to asolution of hydrogen chloride in methylbenzene,there was no apparent reaction.On addition of water to the resulting mixture,there was effervescence.Explain this observation. (2 Mks)

Kibugamu Two Joint Examination Chemistry Paper 1 Question Paper

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