Separation of substances Worksheet-11

Separation of substances Worksheet-11

Multiple-Choice Question:

1. By which process can we separate the insoluble solids suspended in a liquid?

(A) Sedimentation                           (B) Decantation

(C) Filtration

2. By which process, we can separate a mixture of sand and water?

(A) Absorption    (B) Filtration        (C) Decantation

3. Why the mixture is left undisturbed for some time in the process of sedimentation?

(A) So that the heavier particles can settle down

(B) So that the heavier particles can float

(C) So that the water and the particles can get mixed

4. An insoluble solid and a liquid can be separated by this process:

(A) Sedimentation                           (B) Filtration

(C) Decantation

5. In the mixture of sand and water, water is poured out by this process:

(A) Sedimentation                           (B) Filtration

(C) Decantation

6. We can remove the pulp from fresh fruit juice by this process:

(A) Sedimentation                           (B) Filtration

(C) Decantation

7. By which process we can make cottage cheese?

(A) Sedimentation                           (B) Filtration

(C) Decantation

8. Filtration is a process in which:

(A) Two substances are separated by passing the mixture through filtering device.

(B) Two substances are separated by passing the solution through pores of the sieve.

(C) One or more substance/s is/are mixed by adding water in it.

9. In a village, there is a well in which potable water is present. But then too it contains few impurities. By which process can villagers get the water free of impurities?

(A) Decantation

(B) Sedimentation

(C) Filtration

10. In the process of filtration, what gets retained in the filtering device?

(A) Insoluble solid

(B) Liquid

(C) Gas

Answer Key:

1. (A)
2. (C)
3. (A)
4. (B)
5. (C)
6. (B)
7. (B)
8. (A)
9. (C)
10. (A)