Write an equation for the reaction of chlorine with excess of ammonia.

From NH₃, HCl, H₂S, SO₂ – Select :

(i) The gas which when bubbled through CuSO₄ soln., a deep blue coloured soln. is formed.

(ii) This gas burns in oxygen with a green flame.

State the purpose of liquefying the ammonia produced in the Haber’s process.

Name the ion other than ammonium ion formed when ammonia dissolves in water.