Question

Hardness of water is of two types ______.

Options

• Temporary and Permanent

• Rural and Urban

• Saline and Hard

• Salty and Sweet

Answer 1

Hardness of water is of two types temporary and permanent.

Explanation:

The hardness of water is of two types:

1. Temporary Hardness: This is due to the presence of bicarbonates of calcium and magnesium in the water. It can be easily removed by either boiling or by adding lime water to the water sample.
2. Permanent Hardness: It is due to the presence of chlorides and sulphates of calcium and magnesium. This type of hardness cannot be removed from water by boiling it.