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
