Multiple Choice Questions (MCQs): Choose the correct answer for each of the following.
1. Electrolysis of water is the decomposition of water into
(a) hydrogen gas (H) only.
(b) oxygen gas (O) only.
(both hydrogen (H) and oxygen (0.). (d) hydrogen (H) and copper (Cu).
2. Aluminium is extracted from its ore by passing an electric current through
(a) solid bauxite (Al,O,) and cryolite (Na, AIF.).
(b) fused bauxite (Al,0) and solid cryolite (Na, AIF,).
(c) copper sulphate (CuSO) solution.
(d) fused bauxite (Al,0z) and cryolite (Na,AlF).
3. While trying to put out a fire in an electrical appliance, we should
(a) pour distilled water on it.
(b) pour rainwater on it.
(pour tap water on it.
(d) none of these
4. The artide to be electroplated is made
(a) the anode.
(b) the cathode.
(c) either anode or cathode.
(d) none of these.
5. Tin cans used for storing food are made by electroplating a)copper on iron b) iron on tin. c) tin on zinc. d) tin on iron
Answers
Answered by
2
11
Answer:
1.Hydrogen
2.copper sulphate
3.none of these
4.Either anode or cathode
5.Tin on iron
Answered by
1
Answer:
1.both hydrogen And oxygen
Similar questions