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233/1 CHEMISTRY Paper 1 Nov. 2016 2 hours

Index Number Candidate's Signature Date..............................

THE KENYA NATIONAL EXAMINATIONS COUNCIL

Kenya Certificate of Secondary Education

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may be printed

used. as

1-29

80

916502

? 2016 The Kenya National Examinations Council

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1. A student investigated the effect of an electric current by passing it through some substances. The student used inert electrodes and connected a bulb to the circuit. The table below shows the substances used and their states.

Experiment 1 2 3 4

Substance Potassium carbonate Copper (II) sulphate

Sugar Lead (II) iodide

State Solid Solution Solution Molten

2.

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mark) marks)

carbon marks)

*

916502

Kenya Certificate of Secondary Education, 2016

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(b) Given that the empirical formula and the molecular formula of the alkanol are the same,

draw the structure of the alkanol.

(1 mark)

3. The figure below shows an energy cycle.

(a)

Give

the

name of

for free

tphaesetnpthaaplpeyrscvhiasnigt:ewAwHwr.

(b) Determine the value of AH .

(1 mark) (2 marks)

916502

Kenya Certificate of Secondary Education, 2016 233/1

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4. The set up below was used to investigate the reaction between dry hydrogen gas and copper (II) oxide. flame

(a) (b) (c)

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(1 mark) * (1 mark) (1 mark)

Qifisn?

Kenya Certificate of Secondary Education, 2016

Starting with sodium metal, describe how a sample of crystals of sodium hydrogen carbonate

may be prepared.

(3 marks)

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(b) Coordinate (dative) bond

(1 mark) (1 mark)

Kenya Certificate o fSecondary Education, 2016

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