Give balanced equation for the reaction : Ammonia and Oxygen in the presence of a catalyst.

The following questions are based on the preparation of ammonia gas in the laboratory:

(i) Explain why ammonium nitrate is not used in the preparation of ammonia.

(ii) Name the compound normally used as a drying agent during the process.

(iii) How is ammonia gas collected? Explain why it is not collected over water.

State your observation – Water is added to the product formed, when Al is burnt in a jar of nitrogen gas.

Name the gas produced when excess ammonia reacts with chlorine.