Write the balanced equations for the following reactions:

(a) Potassium bicarbonate reacts with dilute HCl.

(b) Laboratory preparation of ethane using soda lime.

(c) Warm water is added to Aluminium nitride.

Nitrogen and hydrogen combine in the presence of a catalyst to give ammonia gas. With reference to the above reaction:

(a) Name the catalyst used.

(b) At what temperature does the above reaction occur?

(c) What optimum pressure should be maintained during the reaction?

Define:

(a) Electrolyte

(b) Catenation

Name the most appropriate method of preparation of the following salts:

(a) Copper carbonate

(b) Sodium sulphate

(c) Ferric chloride