CCE Class IX Chapter: Is matter around us pure : MCQ’S
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1. Which of the following substances when mixed with sand cannot be separated by sublimation?
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(A) NaCl (B) NH4Cl (C) Camphor (D) Iodine
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2. Which of the following is a physical change ?
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(A) Evaporation of alcohol (B) Melting of ice (C) Rusting of iron (D) Both (A) & (B)
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3. What will be the sublimate, when a mixture of sand, sulphur, common salt and iodine is sublimed?
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(A) Sand (B) Iodine (C) Sulphur (D) Common salt
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4. Mixture of sand and camphor can be purified by -
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(A) distillation (B) filtration (C) sedimentation (D) sublimation
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5. A mixture of alcohol and water can e separated by
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(A) separating funnel (B) fractional distillation
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(C) simple distillation (D) sublimation
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6. To separate the various coloured pigments present in a substance which method is used?
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(A) sublimation (B) Chromatography (C) Centrifugation (D) Evaporation
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7. Carbon burns in oxygen to form carbon dioxide. The properties of carbon dioxide are -
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(A) similar to carbon (B) similar to oxygen
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(C) totally different from both carbon and oxygen
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(D) much similar to both carbon and oxygen
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8. A mixture of ammonium chloride and sodium chloride can be separated by
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(A) chromatography (B) hand picking (C) by sublimation (D) centrifugation
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9. Which of the following is not a chemical change ?
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(A) Rusting of iron (B) Cooking of food (C) Freezing of water (D) Digestion of food
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10. Which of the following method is used for separation of different components of petroleum?
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(A) Fractional distillation (B) Sublimation (C) Chromatography (D) Simple distillation
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Answer:
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1
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2
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3
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4
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5
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6
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7
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8
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9
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10
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A
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D
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B
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D
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B
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B
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C
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C
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C
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A
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