Sedimentation

Q. When water containing dissolved salts evaporate there is formation of layer of

1. Salts.
2. Rocks.
3. Sediments.
4. minerals.

Q.

Loading is the process of adding chemical to a solution during sedimentation.

1. True
2. False

Q. Oil and water can be separated from a mixture using __________ .

1. threshing
2. winnowing
3. sedimentation & decantation
4. crystallisation

Q.

The substance that helps water to remove dirt from the surface of materials is called.

1. White cement

2. Tooth decay

3. Detergents
4. Fatty acids

Q. Why is it so important to separate a mixture? Explain with an example.

Q. The process of increasing the rate of sedimentation in a suspension by adding some chemical is known as

1. Condensation.
2. Filtration.
3. Loading.
4. Crystallisation.