Choose the best correct option in the following as :-
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Q1. The used tea learns are separated from prepared tea by the method of:
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a. Centrifugation b. Filtration c. Evaporation d. Sublimation
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Q2. Separating funnel technique is used to separate components which are -
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a.Miscible liquids b. Immiscible liquids c. Solid and liquid d. Solid and gas
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Q3. Centrifugation technique is used to separate:
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a. Cream from milk b. Ammonium chloride and salt c. Alcohol & water d. iron filling and sulphur
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Q4. Which one is a correct method of separating is on filings from sulphur powder.
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a. Heating with water b. passing the mixture over a magnet
c. heating in a china dish d. using a separating funnel.
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Q5. The process of cooling a hot and concentrate solution of a substance to obtain crystals of the solute called
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a.Evaporation b. Sublimation c. Crystallization d. Chromatography
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Q6. Identify the method used to separate more than two components of a mixture whose difference in being point is <25°C.
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a.Distillation b. Fractional distillation c. Crystallization d. Centrifugation.
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Q7. A simple distillation technique used for the mixture if.
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a. Two liquid miscible b. They boil without decomposition
c. They have sufficient difference in their boiling points. d. All the above.
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Q8. For water purification system in water work, the following steps are carried out.
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1.Loading 2. Sedimentation. 3. Chlorination 4.Filtration : the correct sequence of steps is
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a.2,1,4,3 b. 2,3,4,1 c. 2,1,3,4 d. 4,1,2,3
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Q9. A mixture containing sand, Sodium chloride, Ammonium chloride and iron filing may be separated by using following steps. The correct sequence of steps would be.
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1.By using magnet 2. Filtration 3. Evaporation 4. Sublimation
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Q10. The process of crystallization used to.
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a. Purify a large number of water soluble salts. b. Purification of salt that we get from sea water.
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c. Separate crystals B alum (phitkari) from inpure sample. d. All the above.
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CCE :IX Chapter: Is matter around us pure : MCQ’S
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Fill in the blanks: IX: Is matter around us pure
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Test yourself: IX :Is matter around us pure :MCQ’S
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