5: Separation of Substances 

1. By what process is the thin husk removed from the heavy grain?

a) By the process of dying

b) by the process of decay

c) by the process of filtration

Answer:_ b) by the process of decay

2. If the sizes of the components in the mixture are different, by what process can the substances be separated?

a) Sieve

b) Discharge

c) Both of the above

Answer:_  c) Both of the above

3. What is separated from the stem at harvest?

a)  The seeds of the crop

b) Weeds

c) It's not either

Answer:_  a)  The seeds of the crop

4. The What is the process of separating grain from stem called?

a) run through a sieve

b) The process of aging

c) They are dead

Answer:_  c) They are dead

5. What is the man in the picture below doing?
 

a) The oxen and cows are grazing

b) They have beaten the stems and separated the grain

c) They have separated the weeds from the paddy

Answer:_ b) They have beaten the stems and separated the grain


6.What is the process called when the heavy components in a mixture accumulate at the bottom of the container after pouring water?

a) projection

b) Discharge

c) All of the Above

Answer:-  b) Dischargr

7.What is the process called when the water (along with the dust) is removed?

a) projection

b) Discharge

c) All of the above

Answer:_  b) Discharge

8. What is the process of converting water vapor to liquid?

a) Condensation

b)  saturated solutions

c) Evaporation

Answer:_  Evaporation

9. By what process can sand be separated?

a) precipitation and filtration

b) secretion and evaporation

c) Secretion and secretion

Answer:_ c) Secretion and secretion

10. What is the process of converting water to steam called?

a) Condensation

b) Evaporation

c) Discharge

Answer:_  b) Evaporation

১১। 'মৰণা মৰা' শব্দৰ ইংৰাজী ৰূপ কি ?

a) Threshing

b) Solution

c) Filtration

Answer:_  a) Threshing

12. What is the method used to make sana (cheese) at home?

a) projection

b) Discharge

c) All of the above

12. What is the method used to make sana (cheese) at home?

a) projection

b) Discharge

c) All of the above

Answer:_  c) All of the above

13.What do you need to add to boiling milk to prepare sana?

a) Sugar
 
b) Lemon juice

c) Sea buckthorn juice

Answer:_  b) Lemon juice

14. What is mixed in seawater?

a) salt

b)  Soybeans 

c) Dham or Mah

Answer:_  a) salt

15. How can sand and water be separated from their mixture?

a) by the process of precipitation

b) by the process of secretion

c) by the process of filtration

Answer:_  a) by the process of precipitation

16.By what process can sugar mixed with flour be separated?

a)  by the process of decay

b) killing the morna

c) The roof with a sieve

Answer:_   c) The roof with a sieve

17.By what process is salt separated from seawater?

a)  projection

b) Evaporation

c)  Condensation

Answer:_  b) Evaporation

18. Sugar can be separated from tea by filtration.

a)  impure

b) pure

c) It's not either

Answer:_  a)  impure

19. What is the English form of the word discharge?

a)  Sieving

b) Solution

c) Filtration
 
Answer:_  c) Filtration

20. By what process are solids dissolved in liquids separated?

a)  Evaporation

b)  Condensation

c)  projection

Answer:_  a)  Evaporation