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UPSC Combined Geo-Scientist

Chemist

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

Prelims Paper II covers chemistry.

UPSC Combined Geo-Scientist, Prelims · 2022 · Paper II, Chemistry · Q107 of 120

Geo-Scientist Prelims 2022 Chemistry Q107: An unknown compound with molecular formula C₁₀H₁₄ decolorizes…

QuestionStructure determination / oxidative cleavage

An unknown compound with molecular formula C₁₀H₁₄ decolorizes bromine in carbon tetrachloride. When treated with warm, concentrated potassium permanganate, this compound gives cis-cyclohexane-1,2-dicarboxylic acid and oxalic acid. The structure for the unknown compound is

UPSC Combined Geo-Scientist Prelims 2022 Paper II (Chemistry), Q107: answer options as printed
  1. (a) trans-fused hexahydronaphthalene with one C=C in each ring
  2. (b) trans-fused 4a,5,6,7,8,8a-hexahydronaphthalene (conjugated diene in one ring)
  3. (c) cis-fused 4a,5,6,7,8,8a-hexahydronaphthalene (conjugated diene in one ring)
  4. (d) cis-fused hexahydronaphthalene with one C=C in each ring

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