Question

Fill in the blanks:
1. ......................... is used to separate chaff from food grains.
2. A ......................... substance has definite composition and properties.
3. Separation of liquid after sedimentation is called ......................... .
4. ......................... is obtained from sea water by the process of evaporation.
5. ......................... is the process of changing liquid into vapour.

Answer 1

1. Winnowing is used to separate chaff from food grains.

2. A pure substance has definite composition and properties.

3. Separation of liquid after sedimentation is called decantation.

4. Common salt is obtained from seawater by the process of evaporation.

5. Evaporation is the process of changing liquid into vapour.