Which of the following property is used to separate a mixture of two solids by sieving
Answers
Answer:
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Explanation:
Q.1) The method of separation used to separate stone from rice is
Filtration
Winnowing
Hand picking
Threshing
Correct Answer: Hand picking
Q.2) The separation of grains from husk in done by the process of
Sieving
Hand picking
Winnowing
Threshing
Correct Answer: Winnowing
Q.3) Chalk powder suspension in water can be separated by
Decantation
Filtration
Condensation
Evaporation
Correct Answer: Filtration
Q.4) A solution of salt is a
Heterogeneous solution
Homogeneous solution
Element
Compound
Correct Answer: Heterogeneous solution
Q.5) The properties used to separate two solids from a mixture by winnowing is
Attraction by magnet.
Difference in size
Difference is colour
Difference in weight
Correct Answer: Difference in weight
Q.6) Most of the substance that see around us are
Element
Compound
Mixture
Pure solution
Correct Answer: Mixture
Q.7) Which of the following dissolve in water?
Only liquid
Only gases
Only solid
Solid, liquid and gases
Correct Answer: Solid, liquid and gases
Q.8) The dust particles in the water can be helped to settle down faster by using
Alcohol
Common salt
Alum
Sugar
Correct Answer: Alum
Q.9) The process by which the unwanted solid particles are removed from the liquid is called
Loading
Filtration
Sedimentation
Decantation
Correct Answer: Filtration
Q.10) Boiling point of pure water is
1000C
900C
1100C
800C
Correct Answer: 1000C
Q.11) Common salt is obtained from sea water by
Evaporation
centrifugation
Sieving
Condensation
Correct Answer: Evaporation
Q.12) The pure substance have fixed
Melting point only
Boiling point only
Neither boiling nor boiling point
Both melting and boiling point
Correct Answer: Both melting and boiling point
Q.13) Butter is separated from curd by
Heating
Churning
Filtration
Evaporation
Correct Answer: Churning
Q.14) On heating, which one expands maximum?
Semi-solids
Liquids
Gases
Solids
Correct Answer: Gases
Correct Answer: Sieving
Answer. Sieving: The process of separating fine particles from the larger particles by using a sieve, is called sieving. This method is used in a flour mill where impurities like husk and stones are removed from wheat before grinding it.
Centrifugation is the method of separating the mixture of heavy particles and light particles or suspended particles of a substance by rotating the mixture at very high speed. The process of getting solid crystals by cooling a hot concentrated solution of a substance is called crystallization.