Ammonia is manufactured by Haber's process —

(a) Under what conditions do the reactants combine to form ammonia? Give a balanced equation for the reaction.

(b) In what ratio by volume, are the above gases used?

(c) State one possible source of each reactant used in Haber Process.

(d) State whether the formation of ammonia is promoted by the use of high pressure or low pressure?

(e) Mention two possible ways by which ammonia produced is removed from unchanged gases.

(f) What is the function of

    (i) finely divided iron,

    (ii) molybdenum

in the above process?

(g) What is the percentage formation of ammonia?

(h) How can this percentage formation be increased?

Give reason —

Ammonium compounds does not occur in minerals.

Give reason —

Conc. H₂SO₄ is a good drying agent, yet it is not used to dry NH₃.

Give reason —

In the lab. preparation of ammonia

1. calcium hydroxide is used in excess.
2. Flask is fitted in slanting position.