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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 · 2021 · Paper II, Chemistry · Q16 of 120

Geo-Scientist Prelims 2021 Chemistry Q16: The correct order of the bond angles among NH₃, NH₄⁺ and NH₂⁻ is:

QuestionChemical bonding / VSEPR

The correct order of the bond angles among NH₃, NH₄⁺ and NH₂⁻ is:

  1. (a) NH₃ > NH₄⁺ > NH₂⁻
  2. (b) NH₄⁺ > NH₃ > NH₂⁻
  3. (c) NH₃ > NH₂⁻ > NH₄⁺
  4. (d) NH₄⁺ > NH₂⁻ > NH₃

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Topic notes: VSEPR, hybridisation and Bent's rule, with every Civil Services, IFoS and Geo-Scientist PYQ →

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