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UPSC Combined Geo-Scientist

Chemist

  • 2 objective papers
  • 120 questions each
  • 2 h per paper
  • 100 + 300 marks

Prelims Paper I covers general studies.

UPSC Combined Geo-Scientist, Prelims · 2020 · Paper I, General Studies · Q84 of 120

Geo-Scientist Prelims 2020 General Studies Q84: Which one of the following statements is correct about camphor and…

QuestionChemistry / sublimation

Which one of the following statements is correct about camphor and ammonium chloride?

  1. (a) Both of them are inorganic compounds
  2. (b) Both of them are organic compounds
  3. (c) Both of them undergo sublimation
  4. (d) Camphor is an element but ammonium chloride is a compound

Answer: (c) Both of them undergo sublimation

Camphor (organic) and NH₄Cl (inorganic) both sublime on heating — pass from solid to vapour directly. NH₄Cl actually dissociates to NH₃ + HCl and recombines on cooling.

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