Give reason:

A person suffering from acidity is advised to take an antacid.

Give reason:

Acidic soil is treated with quicklime.

Explain the following types of chemical reactions giving two examples for each of them:

(a) combination reaction

(b) decomposition reaction

(c) displacement reaction

(d) double displacement reaction

What are oxides? Give two examples of each of the following oxides.

(a) Basic oxide

(b) Acidic oxide

(c) Amphoteric oxide

(d) Neutral oxide