Mention the conditions required to maximise the yield of ammonia.

Explanation

Ammonia is prepared using the Haber’s process. The yield of ammonia can be maximized under the following conditions:
(i) High pressure `(∼ 200 atm)`
(ii) A temperature of `∼700 K`
(iii) Use of a catalyst such as iron oxide mixed with small amounts of `K_(2)O` and `Al_(2)O_(3)`