(a) Which feature of ammonia molecule leads to the formation of the ammonium ion when ammonia dissolves in water?

(b) Name the other ion formed when ammonia dissolves in water.

(c) Give one test that can be used to detect the presence of the ion produced in (b).

(a) Ammonia reacts with excess chorine to form …………… (nitrogen / nitrogen trichloride / ammonium chloride).

(b) Give a balanced equation: Ammonium hydroxide is added to ferrous sulphate solution.

(c) Write observations: Ammonia gas is passed over heated copper (II) oxide.

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.

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}