Mohr's salt has the formula (NH₄)₂SO₄.FeSO₄.6H₂O

(i) Calculate its molecular mass.

(ii) What is the percentage of Nitrogen in Mohr's salt ? (Atomic mass: N =14, H = 1, S = 32, Fe = 56, O = 16)

Write balanced chemical equations for the preparation of Hydrogen, when the following are used :

(i) Alkali

(ii) Non metal

This question relates to the industrial manufacture of Hydrogen.

(i) Name the process.

(ii) Give the main reactions with conditions.

Write half reactions for the reaction — A⁺ + B ⟶ A + B⁺ and name the following:

(i) oxidizing agent

(b) substance oxidised

(c) reducing agent.