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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 · 2024 · Paper II, Chemistry · Q18 of 120

Geo-Scientist Prelims 2024 Chemistry Q18: Which one of the following reactions is not possible between…

Questionp-block / boron hydrides

Which one of the following reactions is not possible between diborane and ammonia?

  1. (a) B₂H₆ + NH₃ (Excess) —(Low T)→ B₂H₆·2NH₃
  2. (b) B₂H₆ + NH₃ (Excess) —(High T)→ (BN)ₓ
  3. (c) B₂H₆ + 2NH₃ —(RT, Aqueous medium)→ B₄H₁₀ + N₂ + 4H₂
  4. (d) B₂H₆ + 2NH₃ —(High T)→ B₃N₃H₆

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