State whether the following statements are true or false. If false, rewrite the correct form of statements.

Aluminium is more reactive than zinc.

State whether the following statements are true or false. If false, rewrite the correct form of statements.

In the following reaction :

${\mathrm{H}}_2\mathrm{S} + {\mathrm{Cl}}_2 \to 2\mathrm{HCl}+ \mathrm{S}$,

Hydrogen sulphide is acting as an oxidising agent.

State whether the following statements are true or false. If false, rewrite the correct form of statements.

Burning of coal is an exothermic reaction.

Give reasons for the following.

No reaction takes place when a piece of copper is placed in ferrous sulphate solution.

Give reasons for the following.

Limewater turns milky when carbon dioxide gas is passed through it.

Give reasons for the following.

A mixture of alcohol and water can be separated by fractional distillation.

Give reasons for the following.

The boiling point of tap water is above $100{}^{\circ }\mathrm{C}$.

The gas produced when zinc reacts with dilute hydrochloric acid is