cbse class 6 - mcq separation of substances

7/23/2019 CBSE Class 6 - MCQ Separation of Substances

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4. Separation Of Substances

1. The rate of sedimentation is increased by adding ____ to the water.a. Salt

b. Sugarc. Alumd. Soap2. The process followed to separate grains form the stalks is calleda. Winnowing

b. Threshingc. Sievingd. Hand picking3. The process of increasing the rate of sedimentation in a suspension by adding

some chemical is

a. Filtrationb. Crystallisationc. Loadingd. Condensation4. The process of separating the constituents of a liquid by agitating it vigorouslya. Evaporation

b. Churningc. Filtrationd. Sedimentation5. The method that is used to obtain pure salt from impure salta. Decantation

b. Crystallizationc. Evaporationd. Condensation6. A solution which cannot dissolve more of a given substance at a given

temperature isa. Solution

b. Filtratec. Saturated solutiond. Unsaturated solution7. This harmful microbe in water causes typhoid and jaundicea. Virus

b. Bacteriac. Algaed. Fungi

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8. Rain water is a kind ofa. saline water

b. distilled waterc. carbonated waterd. saturated water9. The method used to separate a dissolved solid component from its solutiona. Evaporation

b. Filtrationc. sedimentationd. Decantation10.Butter is separated from curd by the process ofa. Filtration

b. Heatingc. Churningd. Sieving11.A pure solid is obtained from its solution by the process ofa. Condensation

b. decantationc. Sedimentationd. Filtration12.Separating the insoluble suspended solids of various sizes from a liquid is calleda. Filtration

b. Crystallizationc. Evaporationd. Condensation13.Cotton fibre is separated from cotton seeds by the process ofa. Churning

b. Boilingc. Colouringd. Ginning14.Principle behind winnowing isa. Difference in densities of components

b. Difference in colours of componentsc. Difference in appearance of componentsd. Difference in shapes of components15.Paneer is separated from curdled milka. Condensation

b. Filtrationc. evaporationd. sedimentation




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16.The process due to which steam changes into liquid state on coolinga. Decantation

b. Sedimentationc. Filtrationd. Evaporation17.Corn is separated from husk by the process ofa. Sieving

b. Winnowingc. Churningd. Handpicking18.A mixture of sugar and water can be separated bya. Filtration

b. Evaporationc. Separating funneld. decantation19.A saturated solution can dissolve more of a substance ona. Cooling

b. Heatingc. Condensingd. Evaporating20.To evaporate a liquid into its vapour, heat the liquid below itsa. Above its melting point

b. Below its boiling pointc. Below its melting pointd. Above its boiling point21.The clear liquid obtained after filtration is calleda. Water

b. Filtratec. Solutiond. Residue22.Alum is added to muddy water toa. Hasten sedimentation rate

b. Remove colourc. Kill bacteriad. Impart a sweet taste23.The process of making particles of mud heavy with aluma. Decantation

b. loadingc. Filtrationd. Condensation




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24.The addition of bleaching powder to the watera. Kills the microorganism

b. Feeds the microorganismsc. Helps the microorganisms to growd. None of these25.Separation of kerosene oil and water is done bya. Decantation

b. Filtrationc. Condensationd. Crystallisation

Answer Key: Separation of Substances

1)c 2)b 3)c 4)b 5)b 6)c 7)b 8)b 9)a 10)c 11)a 12)a 13)d 14)a 15)b 16)d 17)b

18)b 19)b 20)b 21)b 22)a 23)b 24)a 25)a


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cbse class 6 - mcq separation of substances

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