[CTET Feb 2016]
Q.1. Read the given statements and select the correct option:
Statement I: Husk is separated from heavier seeds of grain by winnowing.
Statement II: Difference in the size of particles in a mixture is utilised to separate them by the process of sieving and filtration.
A, Statement I is true and Statement II is false.
B. Both statement I and II are true.
C. Statement II is true and statement I is true.
D. Both statement I and II are false.
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B. Both statement I and II are true.
[CTET Sep 2014]
Q.2. The Topic "Separation of Substances" in class can be taught most effectively by
A. In-depth explanation of related concepts.
B. Using hands on activities to be performed by students.
C. Using good home assignments.
D. Organising more group discussions on different sub-topics.
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B. Using hands on activities to be performed by students.
Q.3 Choosing a material to make an object depends on its
A. Physical and Chemical Properties.
B. Only Physical Property.
C. Only Chemical Property.
D. Purpose for which the object is to be used.
E. Both A and D.
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Both A and D.
Q.4. _______ gas dissolved in water is very important for the survival of animals and plants that live in water.
A. Nitrogen.
B. Carbon dioxide.
C. Oxygen.
D. Hydrogen.
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C. Oxygen.
Q.5. Which of the below set are examples of transparent material?
A. Glass, Water, Wood.
B. Glass, Air, Water.
C. Diamond, Metal, Air.
D. Oiled paper, Air, Water.
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B. Glass, Air, Water.
Q.6. Which of the below statement is correct?
A. Oil is soluble in water.
B. Vinegar is soluble in water.
C. Sugar does not dissolve in water.
D. Chalk dissolves in water.
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B. Vinegar is soluble in water.
Q.7. The method of separating seeds of paddy from its stalks is called ___________.
A. Threshing.
B. Hand picking.
C. Winnowing.
D. Sieving.
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A. Threshing
Q.8. Salt is obtained from seawater by the process of ___________.
A. Sedimentation and Decantation.
B. Evaporation.
C. Condensation.
D. Winnowing.
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B. Evaporation.
Q.9. Which of the below statement is/are correct?
I. A mixture of milk and water can be separated by filtration.
II. A mixture of powdered salt and sugar can be separated by the process of winnowing.
III. Separation of sugar from tea can be done with filtration.
IV. Grain and husk can be separated with the process of decantation.
A. II and III only.
B. Only I.
C. All of these.
D. None of these.
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D. None of these.
Q.10. A solution is said to be _______ if it cannot dissolve more of the substance in it.
A. Saturated.
B. Unsaturated.
C. Diluted.
D. None of these.
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A. Saturated.
Q.11. Difference in the size of particles in a mixture is utilised to separate them by the process of ______ and ________.
A. Sieving and Evaporation.
B. Sieving and filtration.
C. Sedimentation and Decantation.
D. Threshing and Winnowing.
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B. Sieving and filtration.
Q.12. The process of conversion of water vapour into its liquid form is called ________.
A. Evaporation.
B. Decantation.
C. Condensation.
D. None of these
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C. Condensation.
Q.13. When milk, cooled after boiling, is poured onto a piece of cloth the cream (malai) is left behind on it. This process of separating cream from milk is an example of ___________.
A. Sieving.
B. Filtration.
C. Sedimentation.
D. Evaporation.
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B. Filtration.
Read notes on Material and Separation of Substances here.
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