Properties of Water

1. Pure water is colorless and transparent liquid but sometimes when looking at deep water, it appears blue. This appearance is caused by scattering of light.

2. Pure water is odorless. Contaminated water causes an unpleasant smell. It is caused by dissolved dirt in it.

3. Pure water is tasteless, but water from any place is tasty. This is due to dissolved gases and some mineral salts in it. Germs find favorable conditions in the stagnant waters of lakes and ponds. These germs present in the air and soil reach from one place to another through the water of rivers. This causes the water to become polluted and not potable for drinking. So before using water, It must be checked.

4 On heating, the water remains thin and cold; and does not thicken. If the water starts getting thin and thicker on cooling, then imagine what will happen to the organisms and plants?

5. Water is transparent to visible light. Light rays can go very deep in water. That is why we can see deep in water. Life of many aquatic organisms is possible in water.

6. Water is a good solvent for many substances. That is why we use it in pharmaceutical manufacturing and many chemical industries. 

7. Water cools to ice (solid) when it cools to zero degree temperature. When the ice is hot, it starts changing again to zero degree temperature in a liquid state. This temperature at which the ice reverts to water is called the melting point of ice. But due to dissolution of impurities in water, the melting point of ice decreases.

8. On heating pure water to (100 degree Celsius) it starts boiling and turns into a gaseous state (in steam). This temperature is called the boiling point of water. For pure water, it is the right temperature for boiling. But due to dissolution of impurities in water, boiling point increases. This means that some impure water boils at a higher temperature than (100 degree Celsius). 

9. Generally, the density of a substance in the solid state is greater than the density of its fluid state. But the solid form of water, the density of ice, is less than the liquid water. This is why ice floats above water.

When the normal temperature (room temperature) is greater than (melting temperature of ice), the water temperature obtained by melting ice usually increases and its density is greater at (1.3 times of water). It is over. Because (more than) temperature, the density of water starts to decrease. Hence, the density of water above and below (ice) is reduced. Due to this quality, the winter days in cold regions; In spite of freezing of ice, aquatic organisms live there.

10. Water is a solvent, because most of the substances present in water are bad conductors of electricity. That is, distilled water cannot conduct electricity.