CG Board Class 6 Science Separation of Matter MCQ
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1. What is ORS a mixture of?
a) Lemon juice and sugar
b) Sugar and salt in water
c) Water and lemon juice
d) Salt and lemon juice
Answer: b) Sugar and salt in water
2. Why do we need separation of substances?
a) To make mixtures
b) To remove useful components
c) To remove non-useful components
d) To make them more complex
Answer: c) To remove non-useful components
3. Which method is used to separate small stones from pulses?
a) Sieving
b) Hand-picking
c) Winnowing
d) Threshing
Answer: b) Hand-picking
4. In construction sites, which method is used to separate pebbles from sand?
a) Hand-picking
b) Sieving
c) Winnowing
d) Loading
Answer: b) Sieving
5. Winnowing is used to separate:
a) Grain seeds from stalks
b) Iron from sand
c) Oil from water
d) Salt from water
Answer: a) Grain seeds from stalks
6. Which property is used in magnetic separation?
a) Solubility
b) Magnetic attraction
c) Density
d) Size
Answer: b) Magnetic attraction
7. The process where heavier particles settle down in a liquid is called:
a) Decantation
b) Sedimentation
c) Filtration
d) Loading
Answer: b) Sedimentation
8. A separating funnel is used to separate:
a) Solid from liquid
b) Two miscible liquids
c) Two immiscible liquids
d) Soluble substances
Answer: c) Two immiscible liquids
9. Loading is done using:
a) Magnet
b) Alum
c) Filter paper
d) Sieve
Answer: b) Alum
10. Centrifugation is used in:
a) Separating cream from milk
b) Separating salt from water
c) Separating iron from sand
d) Separating pebbles from sand
Answer: a) Separating cream from milk
11. In water purification plants, which chemical is used to remove harmful organisms?
a) Alum
b) Chlorine
c) Iodine
d) Salt
Answer: b) Chlorine
12. The process of obtaining salt from seawater uses:
a) Filtration
b) Evaporation
c) Distillation
d) Sublimation
Answer: b) Evaporation
13. Crystallization is used to obtain pure:
a) Common salt
b) Iron filings
c) Copper sulphate crystals
d) Sand
Answer: c) Copper sulphate crystals
14. Distillation is a combination of:
a) Evaporation and filtration
b) Evaporation and condensation
c) Condensation and sedimentation
d) Filtration and condensation
Answer: b) Evaporation and condensation
