Aqueous solution of nickel sulphate contains Ni²⁺ and SO₄^2- ions

(i) Which ion moves towards the cathode?

(ii) What is the product at the anode?

Select the correct answer — The aqueous solution of the compound which contains both ions and molecules is:

1. Sulphuric acid
2. Hydrochloric acid
3. Nitric acid
4. Acetic acid

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.

(A) Sulphur

(B) Silver chloride

(C) Hydrogen chloride

(D) Copper [II] sulphate

(E) Graphite

State which from A to E fits the description — 'A pink metal is deposited at the cathode during the electrolysis of the soln. of this salt.