Question

Give five important physical properties of water.

Answer 1

• The chemical formula of water is ${\mathrm{H}}_2\mathrm{O}$.
• About 70% of the earth's surface is covered by water.

The physical properties of water are:-

1. Water is colorless, odorless, and tasteless.
2. The boiling point of water is 100^oC.
3. The boiling point of water increases due to the presence of dissolved impurities in it.
4. The freezing point of water is 0^oC.
5. Water has an unusual physical property i.e anomalous expansion of water. When water gets cooled, it first contracts in volume, as do other liquids, but below 4^oC, it starts expanding and continues to do so till the temperature reaches 0^oC, the point at which it freezes into ice.