Question

send me some questions of separation of substances very hard with answer mcq type​

Answer 1

Answer:

2.The method used to separate substances differing in colour, size and shape from a solid mixture __________

magnetic separation

decantation

handpicking

sieving

3.In a mixture, solids of different size can be separated by___________

magnetic separation

winnowing

sieving

evaporation

4.The method used to separate the seeds from the fruit juice is _________

filtration

sieving

crystallization

winnowing

5. Iron fillings present in rava and tea dust can be separated by________

hand picking

magnetic separation

sieving

evaporation

6.The clear liquid above the sediment is called_________

suspended liquid

residue

filtrate

7. Which of the following is not used to separate the mixture of solid and liquid _________

Sieving

Decentation

Sedimentation

Filtration

8. Which of the following method is applied to remove the impurities such as bran, husk, stone and worms from flour__________

Sieving

Hand picking

Filtration

Evaporation

9.Which of the following is used to separate lighter particles from heavier particles __________

Evaporation

Hand picking

Winnowing

Magnetic separation

Answer 2

_Separation of Substances

1. The rate of sedimentation is increased by adding ____ to the water.

a. Salt

b. Sugar

c. Alum

d. Soap

2. The process followed to separate grains form the stalks is called

a. Winnowing

b. Threshing

c. Sieving

d. Hand picking

3. The process of increasing the rate of sedimentation in a suspension by adding

some chemical is

a. Filtration

b. Crystallisation

c. Loading

d. Condensation

4. The process of separating the constituents of a liquid by agitating it vigorously

a. Evaporation

b. Churning

c. Filtration

d. Sedimentation

5. The method that is used to obtain pure salt from impure salt

a. Decantation

b. Crystallization

c. Evaporation

d. Condensation

6. A solution which cannot dissolve more of a given substance at a given

temperature is

a. Solution

b. Filtrate

c. Saturated solution

d. Unsaturated solution

7. This harmful microbe in water causes typhoid and jaundice

a. Virus

b. Bacteria

c. Algae

d. Fungi

8. Rain water is a kind of

a. saline water

b. distilled water

c. carbonated water

d. saturated water

9. The method used to separate a dissolved solid component from its solution

a. Evaporation

b. Filtration

c. sedimentation

d. Decantation

16. The process due to which steam changes into liquid state on cooling

a. Decantation

b. Sedimentation

c. Filtration

d. Evaporation

17. Corn is separated from husk by the process of

a. Sieving

b. Winnowing

c. Churning

d. Handpicking

18. A mixture of sugar and water can be separated by

a. Filtration

b. Evaporation

c. Separating funnel

d. decantation

19. A saturated solution can dissolve more of a substance on

a. Cooling

b. Heating

c. Condensing

d. Evaporating

20. To evaporate a liquid into its vapour, heat the liquid below its

a. Above its melting point

b. Below its boiling point

c. Below its melting point

d. Above its boiling point

21. The clear liquid obtained after filtration is called

a. Water

b. Filtrate

c. Solution

d. Residue

22. Alum is added to muddy water to

a. Hasten sedimentation rate

b. Remove colour

c. Kill bacteria

d. Impart a sweet taste

23. The process of making particles of mud heavy with alum

a. Decantation

b. loading

c. Filtration

d. Condensation

10. Butter is separated from curd by the process of

a. Filtration

b. Heating

c. Churning

d. Sieving

11. A pure solid is obtained from its solution by the process of

a. Condensation

b. decantation

c. Sedimentation

d. Filtration

12. Separating the insoluble suspended solids of various sizes from a liquid is called

a. Filtration

b. Crystallization

c. Evaporation

d. Condensation

13. Cotton fibre is separated from cotton seeds by the process of

a. Churning

b. Boiling

c. Colouring

d. Ginning

14. Principle behind winnowing is

a. Difference in densities of components

b. Difference in colours of components

c. Difference in appearance of components

d. Difference in shapes of components

15. Paneer is separated from curdled milk

a. Condensation

b. Filtration

c. evaporation

d. sedimentation

24. The addition of bleaching powder to the water

a. Kills the microorganism

b. Feeds the microorganisms

c. Helps the microorganisms to grow

d. None of these

25. Separation of kerosene oil and water is done by

a. Decantation

b. Filtration

c. Condensation

d. Crystallisation

Answer Key: Separation of Substances

1)c 2)b 3)c 4)b 5)b 6)c 7)b 8)b 9)a 10)c 11)a 12)a 13)d 14)a 15)b 16)d 17)b

18)b 19)b 20)b 21)b 22)a 23)b 24)a 25)a

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