Saturday, August 4, 2012

Test yourself: IX Ch:Is matter around us pure :MCQ’S

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

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