CHEMISTRY

SCIENCE Paper – 2

SECTION I (40 Marks)

Question 1

(a) Choose the most appropriate answer.
(i) Which of the following is a common characteristic of a covalent compound?
A High melting point.
B Conducts electricity when it is in the molten state.
C Consists of molecules.
D Always soluble in water.

(ii) Ammonium hydroxide will produce a reddish brown precipitate when added to a solution of :
A CuSO4
B Zn(NO3)2
C FeSO4
D FeCl3

(iii) A salt which in solution gives a bluish white precipitate with NaOH solution and a white precipitate with BaCl2 solution is:
A CuSO4
B FeSO4
C Fe2 (SO4)3
D CuCl2

(iv) The gas law which relates the volume of a gas to moles of the gas is:
A Avogadro’s Law
B Gay-Lussac’s Law
C Boyle’s Law
D Charle’s Law
(v) During the electrolysis of acidified water which of the following takes place:
A Oxygen is released at cathode.
B Oxygen is released at anode.
C Hydrogen is released at anode.
D Sulphur dioxide is released at anode.

(vi) Duralumin is an alloy of
A Al and Cu
B Cu and Sn
C Al and Ag
D Al and Fe

(vii) Hydrogen chloride can be obtained by adding concentrated Sulphuric acid to:
A NaCl
B Na2SO4
C Na2CO3
D NaNO3.

(viii) Which of the following reactions gives copper as a product
A Passing dry ammonia over heated copper oxide.
B Adding dilute hydrochloric acid to copper oxide.
C Heating copper oxide.
D Passing oxygen over heated copper oxide?

(ix) Formation of chloroform from methane and chlorine is an example of:
A Addition
B Dehydration
C Substitution
D Elimination.

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