Chemistry MCQs

Chemistry Objective (Multiple Choice) General Knowledge Questions & Answers for SSC-CGL, UPPSC, UPSC, NDA, CDS and UPSC Civil Services Prelims Examination.

11. Which of the following is the composition of vinegar?
[A] 65-75% solution of acetic acid in water
[B] 45-60% solution of acetic acid in water
[C] 28-35% solution of acetic acid in water
[D] 5-8% solution of acetic acid in water

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12. What are the constituents of German Silver alloy?
[A] Gold, Aluminium and Copper
[B] Zinc, iron and Silver
[C] Bismuth, Antimony and Tin
[D] Copper, Nickel and Zinc

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13. Which of these is an ore of Aluminium?
[A] Corundum
[B] Kieserite
[C] Pitch blende
[D] All of the above

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14. What is the S.I unit of activity?
[A] becquerel
[B] curie
[C] candela
[D] henry

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15. Choose the correct statement about corrosion:
[A] Corrosion of metals is an electrochemical phenomenon
[B] Bisphenol can be used to cover the metal surface to prevent corrosion
[C] Both a and b
[D] None

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16. Which of the following metals can easily be cut with a knife?
[A] Sodium
[B] Manganese
[C] Zinc
[D] Tin

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17. Which of the following is the main ingredient that is used to make cement?
[A] Calcium
[B] Silicon
[C] Aluminum
[D] All of the above

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18. Which of the following chemicals is used as a ‘fixer’ in photography?
[A] sodium sulphate
[B] sodium thiosulphate
[C] ammonium persulphate
[D] borax

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19. Which of the following is the working principle of a washing machine?
[A] Centrifugation
[B] dialysis
[C] reverse osmosis
[D] diffusion

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20. Soft drinks such as colas contain significant quantities of?
[A] caffeine
[B] nicotine
[C] tannin
[D] renin

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