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 method will is most suitable to separate the mixture of ammonium chloride and salt?
[A] Evaporation
[B] Sublimation
[C] Simple Distillation
[D] All of the above

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12. Which of the following is the correct order of the decreasing order of abundance of the elements in earth’s crust?
[A] Iron > Silicon > Oxygen >Aluminium
[B] Oxygen > Silicon > Aluminium > Iron
[C] Oxygen> Iron > Aluminium > Silicon
[D] Iron > Aluminium > Silicon > Oxygen

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13. Which of the following molecules have a T-shape arrangement?
[A] Ozone
[B] Water
[C] Chlorine Trifluoride
[D] Sulphur dioxide

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14. What is the product when Methane reacts with steam in the presence of Nickel catalyst?
[A] Carbon dioxide and ethane
[B] Ethyne
[C] Carbon monoxide and dihydrogen
[D] Carbon monoxide and Water vapour

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15. Which of these polymers are used to produce Butyl-rubber?
[A] butadiene and neoprene
[B] butadiene and styrene
[C] butadiene and acrylonitrile
[D] butadiene and isobutylene

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16. What is the monomer unit of PMMA?
[A] butyl methacrylate
[B] ethyl methacrylate
[C] methyl methacrylate
[D] iso-propyl methacrylate

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

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18. Which of these non-metals finds its use as a diluent for oxygen in modern diving apparatus?
[A] Neon
[B] Helium
[C] Bromine
[D] Argon

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19. Which of these chemicals is used as a water softening agent?
[A] Baking soda
[B] Washing soda
[C] Bleaching powder
[D] Slaked lime

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20. Which of these chemical is used to form soaps containing sodium salts?
[A] Sulphuric acid
[B] Sodium hydroxide
[C] Nitric acid
[D] Carbonic acid

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