Question

Choose the correct option.
1. During the electrolysis of water, the ratio of volumes of hydrogen and oxygen liberated at the
electrodes is
(a) 1:2
(b) 1:4
(c) 2:1
(d) 2:4
2. When electric current is passed through acidified water, the gas liberated at positive electrode
(a) oxygen
(b) hydrogen
(c) nitrogen
(d) carbon dioxide
3. When electric current passes through salt water, the gas liberated at negative electrode is
(a) oxygen
(b) hydrogen
(c) nitrogen
(d) carbon dioxide
4. A dry cell can give a potential difference of
(a) 1 volt
(b) 1.5 volts
(c) 3 volts
(d) 2 volts
5. Identify the reaction that happens at the anode of a cell.
(a) ZnZn²+ 2e
(b) 2NH, (aq) + 2e → 2NH, (g) + H, (g)
(c) Mno, (s) + H, (g) → MnO, (s) + H,O (1)
(d) 2NH, (aq) + MnO, (s) + 2e → Mn,o, (s) + 2NH, (g) + H,O (1)
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Answer 1

Answer:

HELLO........

GOOD MORNING..........

Answer 2

Answer:

when zinc is added to copper sulphate solution then the Zinc metal displace copper from copper sulphate to form zinc sulphate