Wednesday, August 21, 2013

CBSE Class 6 - Science - CH5 - Separation of Substances (MCQs)

Separation of Substances 

(MCQs)

Q1: The process of settling down of particles of a solid in a liquid is known as

(a) sublimation
(b) sedimentation
(c) decantation
(d) precipitation


Q2: Which of the following is essential to perform winnowing activity?

(a) soil
(b) water
(c) wind
(d) none of these


Q3: Hand picking method is effective in

(a) gaseous mixture
(b) solid mixture
(c) liquid mixture
(d) none of these



Q4: Which of the following method used to separate two miscible liquids?

(a) Separating funnel
(b) Sieving
(c) Winnowing
(d) Sublimation


Q5: The spinner in washing machine dries clothes works on the principle of 

(a) evaporation
(b) sedimentation
(c) filtration
(d) centrifugation


Q6: 'Combine' is used in which of the following?

(a) threshing
(b) winnowing
(c) sieving
(d) filtration


Q7: The solubility of water __________ with an increase in water.

(a) increases
(b) decreases
(c) remains same
(d) sometimes increases and sometimes decreases


Q8: Air is a __________

(a) mixture
(b) compound
(c) pure substance
(d) none of these


Q9: The process of solid changing directly in vapour form without becoming liquid is called

(a) sedimentation
(b) sublimation
(c) evaporation
(d) condensation


Q10:  Salt is obtained from sea water by using which of the following process.

(a) Sedimentation
(b) Condensation
(c) Evaporation
(d) Centrifugation

Answers:
1: (b) sedimentation
2: (c) wind
3: (b) solid mixture
4: (a) Separating funnel
5: (d) centrifugation
6: (a) threshing
7: (a) increases
8: (a) mixture
9: (b) sublimation
10: (c) Evaporation

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