Name the other ion formed when ammonia dissolves in water.

Name the following:
A compound added to lower the fusion temperature of electrolytic bath in the extraction of aluminium.

State your observation in each of the following cases:

When dilute hydrochloric acid is added to sodium carbonate crystal

When moist starch iodide paper is introduced into chlorine gas.

Write balanced equation for the following:

The action of warm water on magnesium nitride.

Write balanced equation for the following:

Action of heat on a mixture  of copper and concentrated nitric acid.

Give one test that can be used to detect the presence of the ion produced

Name the following:

The ore of zinc-containing its sulphide.

State your observation in the following case:

When calcium hydroxide is heated with ammonium chloride crystal.

Write a balanced equation for the following:

The action of dilute hydrochloric acid on sodium sulphide.