Write the equation for the action of heat on:

(a) Ammonium chloride

(b) Ammonium nitrate

State whether each reaction is an example of thermal decomposition or thermal dissociation.

(a) Of the two gases, ammonia and hydrogen chloride, which is more dense? Name the method of collection of this gas.

(b) Give one example of a reaction between the above two gases which produces a solid compound.

(c) Write a balanced equation for a reaction in which ammonia is oxidized by:

(i) a metal oxide

(ii) a gas which is not oxygen.

Name a compound prepared by ammonia and is used as :

(a) Explosive

(b) Fertilizers

(c) Medicine

(d) Laboratory reagent

Study the flow chart given and give balanced equations to represent the reactions A, B and C.

$\text{Mg}$3\text{N}2 \xrightarrow{\text{A}} \text{NH}3 \xtofrom[\text{C}]{\text{B}} \text{NH}4\text{Cl}