Separation of substances is an important part of our daily life. This chapter explains different methods such as handpicking, threshing, winnowing, filtration, decantation, evaporation, and churning. These techniques help us purify substances and make them useful in everyday activities. Lets have a look at some of the top multiple choice questions for Chapter 9, Methods of Separation in Everyday Life.
This Class 6 Science MCQ includes a set of MCQs, fill-in-the-blanks, and true or false questions with answer support.
MCQ Questions for Class 6 Science Chapter 9 Methods of Separation in Everyday Life
Question 1: Why do we separate components of a mixture in daily life?
a) To make food look colourful
b) To remove harmful or unwanted substances and to obtain useful ones
c) To waste time
d) To change a solid into a gas
Answer:
b) To remove harmful or unwanted substances and to obtain useful ones.
Question 2: Which method is most suitable to remove visible stones from rice or pulses?
a) Winnowing
b) Handpicking
c) Evaporation
d) Condensation
Answer:
b) Handpicking.
Question 3: Handpicking works best when the unwanted material is
a) Very fine and mixed uniformly
b) In very large quantity
c) Different in size and present in small amounts
d) Dissolved in the mixture
Answer:
c) Different in size and present in small amounts.
Question 4: The process used by farmers to separate grains from harvested stalks is
a) Sieving
b) Threshing
c) Sedimentation
d) Filtration
Answer:
b) Threshing.
Question 5: Threshing can be done by
a) Beating the crop on a hard surface
b) Using bullocks to tread
c) Using a threshing machine
d) All of the above
Answer:
d) All of the above.
Question 6: The method used to separate lighter husk from heavier grain with the help of wind is
a) Winnowing
b) Sieving
c) Filtration
d) Decantation
Answer:
a) Winnowing.
Question 7: During winnowing, the lighter and heavier components separate because of differences in
a) Colour
b) Taste
c) Weight (heaviness)
d) Temperature
Answer:
c) Weight (heaviness).
Question 8: Sieving is used to separate particles
a) Of the same size
b) Dissolved in water
c) Of different sizes using a sieve with holes
d) Of different colours only
Answer:
c) Of different sizes using a sieve with holes.
Question 9: Which of the following is a common example of sieving at home?
a) Separating tea leaves from tea
b) Removing bran or unwanted particles from flour
c) Separating cream from milk
d) Removing oil from water
Answer:
b) Removing bran or unwanted particles from flour.
Question 10: Which method is used to separate insoluble solid from a liquid using a porous barrier?
a) Sedimentation
b) Filtration
c) Evaporation
d) Condensation
Answer:
b) Filtration.
Question 11: Separating tea leaves from prepared tea using a strainer is an example of
a) Filtration
b) Sedimentation
c) Decantation
d) Threshing
Answer:
a) Filtration.
Question 12: When muddy water is left undisturbed, the sand settles at the bottom. This process is called
a) Filtration
b) Sedimentation
c) Evaporation
d) Sublimation
Answer:
b) Sedimentation.
Question 13: After sedimentation, the clear liquid above the settled solids is carefully poured off. This is
a) Winnowing
b) Decantation
c) Sieving
d) Loading
Answer:
b) Decantation.
Question 14: Adding alum to muddy water helps in faster settling of suspended particles. This process is called
a) Loading
b) Threshing
c) Churning
d) Evaporation
Answer:
a) Loading.
Question 15: Which method is suitable to separate salt dissolved in water?
a) Sedimentation and decantation
b) Filtration
c) Evaporation
d) Winnowing
Answer:
c) Evaporation.
Question 16: Which is NOT removed by filtration?
a) Tea leaves from tea
b) Sand from muddy water
c) Salt dissolved in water
d) Chalk particles from water
Answer:
c) Salt dissolved in water.
Question 17: The method used to separate cream (fat) from curd by vigorous stirring is
a) Churning
b) Loading
c) Sieving
d) Winnowing
Answer:
a) Churning.
Question 18: Butter obtained by churning floats because
a) It is heavier than water
b) It is lighter than water
c) It dissolves in water
d) It reacts with water
Answer:
b) It is lighter than water.
Question 19: To separate oil from water kept in a beaker, the easiest method is
a) Filtration through filter paper
b) Handpicking
c) Decantation by pouring off the upper oil layer
d) Evaporation
Answer:
c) Decantation by pouring off the upper oil layer.
Question 20: Which method helps to remove iron filings from a mixture of sand and iron?
a) Churning
b) Using a magnet
c) Evaporation
d) Sieving
Answer:
b) Using a magnet.
Question 21: In a mixture of sand and salt, which step should be done first to separate them?
a) Filtration of the dry mixture
b) Add water to dissolve the salt
c) Use a magnet
d) Use winnowing
Answer:
b) Add water to dissolve the salt.
Question 22: After dissolving salt from a sand–salt mixture, the sand is separated by
a) Evaporation
b) Condensation
c) Filtration
d) Threshing
Answer:
c) Filtration.
Question 23: The salt solution obtained after filtering sand can be separated to get salt by
a) Winnowing
b) Threshing
c) Evaporation to dryness
d) Sieving
Answer:
c) Evaporation to dryness.
Question 24: Which pair is correctly matched with the method used?
a) Wheat and husk — filtration
b) Rice and stones — handpicking
c) Milk and cream — sieving
d) Salt and water — winnowing
Answer:
b) Rice and stones — handpicking.
Question 25: Which separation method relies mainly on wind or moving air?
a) Threshing
b) Winnowing
c) Sieving
d) Filtration
Answer:
b) Winnowing.
Question 26: In sieving flour, the material that passes through the holes is called
a) Residue
b) Filtrate
c) Mixture
d) Sieve
Answer:
b) Filtrate (the finer flour), while the coarser particles remain as residue.
Question 27: Which statement about sedimentation and decantation is TRUE?
a) They are used to separate dissolved solids from liquids
b) They are used to separate an insoluble solid from a liquid
c) They can separate two gases
d) They can separate two solids of the same size
Answer:
b) They are used to separate an insoluble solid from a liquid.
Question 28: In filtration, the solid that remains on the filter paper is called
a) Filtrate
b) Residue
c) Solvent
d) Solute
Answer:
b) Residue.
Question 29: Which method is best for separating pebbles from sand collected from a playground?
a) Sedimentation
b) Handpicking or sieving (depending on sizes)
c) Evaporation
d) Decantation
Answer:
b) Handpicking or sieving (depending on sizes).
Question 30: Which statement about evaporation is CORRECT?
a) It needs boiling
b) It can occur at room temperature and helps separate a dissolved solid from a liquid
c) It is used to separate husk from grain
d) It removes insoluble solids from water using paper
Answer:
b) It can occur at room temperature and helps separate a dissolved solid from a liquid.
Fill in the Blanks Questions for Class 6 Science Chapter 9 Methods of Separation in Everyday Life
1. The process of separating grains from the harvested crop is called ___.
Answer:
Threshing
2. The method of separating lighter husk particles from heavier seeds with the help of wind is called ___.
Answer:
Winnowing
3. The method used to separate insoluble solid particles from a liquid using a filter is called ___.
Answer:
Filtration
4. The clear liquid that remains above the settled solids after sedimentation is removed by the process of ___.
Answer:
Decantation
5. Adding alum to muddy water to make suspended particles settle faster is called ___.
Answer:
Loading
6. The process of separating salt from salt solution by heating is called ___.
Answer:
Evaporation
7. The solid that remains on the filter paper after filtration is called ___.
Answer:
Residue
8. The liquid that passes through the filter paper during filtration is called ___.
Answer:
Filtrate
9. The method used to separate butter from curd is called ___.
Answer:
Churning
10. Iron filings can be separated from sand with the help of a ___.
Answer:
Magnet
True or False Questions for Class 6 Science Chapter 9 “Methods of Separation in Everyday Life”
1. Handpicking is the most suitable method when the quantity of the component to be removed is very large.
Answer:
False – Handpicking suits only small quantities.
2. Threshing is the process of separating grains from harvested stalks by beating them.
Answer:
True – Stalks are beaten to release the grains.
3. In winnowing, the heavier component of the mixture gets blown away by wind while the lighter component falls down.
Answer:
False – Lighter component blows away; heavier falls down.
4. Modern threshing machines called threshers can perform both threshing and winnowing simultaneously.
Answer:
True – They separate grains from stalks and husk together.
5. Sieving is used when the components of a solid-solid mixture have different sizes.
Answer:
True – Smaller particles pass through; larger ones remain.
6. Decantation is the process of the heavier insoluble component settling at the bottom of a liquid.
Answer:
False – That is sedimentation; decantation is removing the liquid by tilting.
7. Filtration can be used to separate salt from a salt solution, since salt particles are too small to pass through filter paper.
Answer:
False – Salt dissolves in water and passes through filter paper.
8. During churning of curd, butter floats to the top because it is lighter than buttermilk.
Answer:
True – Lighter butter rises; buttermilk is left behind.
9. A filter paper has larger pores than a piece of cloth, making it better at filtering very fine particles.
Answer:
False – Filter paper has finer pores than cloth.
10. Evaporation can be used to separate a solid that is dissolved in a liquid, such as salt from seawater.
Answer:
True – Water evaporates, leaving behind the dissolved solid.
11. Sawdust and iron nails mixed together can be most efficiently separated using the filtration method.
Answer:
False – Magnetic separation is the correct method here.
12. Only iron is a magnetic substance; therefore, magnetic separation can only be used when iron is one of the components in the mixture.
Answer:
False – Other magnetic substances also exist besides iron.
13. Handpicking is done on the basis of differences in size, colour and shape of the particles in a mixture.
Answer:
True – These visible differences make handpicking possible.
14. In the filtration process, the substance left on the filter paper is called the filtrate and the liquid collected below is called the residue.
Answer:
False – The solid left is residue; liquid collected is filtrate.
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