CBSE Class 6 Science HOTs Separation Of Substances

Download HOTS questions and answers for Class 6 Science. Read CBSE Class 6 Science HOTs Separation Of Substances below and download in pdf. High Order Thinking Skills questions come in exams for Science in Standard 6 and if prepared properly can help you to score more marks. You can refer to more chapter wise Class 6 Science HOTS Questions with solutions and also get latest topic wise important study material as per NCERT book for Class 6 Science and all other subjects for free on Studiestoday designed as per latest CBSE, NCERT and KVS syllabus and pattern for Grade 6

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

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
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
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
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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