During electroplating of an article with nickel —

(i) Name — (a) The electrolyte (b) The cathode (c) The anode

(ii) Give the reaction of the electrolysis at (a) The cathode (b) The anode

Correct the following statements — Lead bromide conducts electricity.

A metal article is to be electroplated with silver. The electrolyte selected is sodium argentocyanide.

(i) What kind of salt is sodium argentocyanide.

(ii) Why is it preferred to silver nitrate as an electrolyte?

(iii) State one condition to ensure that the deposit is smooth, firm and long lasting.

(iv) Write the reaction taking place at the cathode.

(v) Write the reaction taking place at the anode.

Select the correct answer — A compound which during electrolysis in it's molten state liberates a reddish brown gas at the anode :

1. Sodium chloride
2. Copper (II) oxide
3. Copper (II) sulphate
4. Lead (II) bromide