Sedimentation and Decantation

Q.

Butter Is Separated From Milk by (a) Sedimentation (B) Filtration (C) Churning (D) Decantation

1. (a) Sedimentation.

2. (B) Filtration.

3. (C) Churning.

4. (D) Decantation.

Q. Describe the steps involved in getting clarified water from wastewater.

Q.

18. The most convenient way of separating sawdust from water is

1. distillation

2. evaporation

3. filtration

4. sedimentation and decantation

Q. tank is used in purification of water, to remove heavy solid impurities by allowing them to settle down at the bottom.

1. Sedimentation
2. Loading
3. Filtration

Q. A commonly used chemical for loading is
(a) hydrogen.
(b) alum.
(c) sulphur.
(d) common salt.

Q. A mixture of sand and water can be separated by sedimentation.

1. True
2. False

Q. Insoluble solid particles settle at the bottom in a solid-liquid mixture. These are collectively known as .

1. filtrate
2. sediment
3. distillate

Q. The components of which among the following mixtures can be separated by filtration?

1. Cornflakes in milk
2. Sugar in water
3. Ink in water
4. Saltwater

Q.

The seperation of a mixture of a liquid by distillation is called

1. Filteration

2. Sedimentation

3. Fractional distillation

4. Decantation

Q. Name the steps involved in the purification of drinking water supplied in cities and towns.