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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 · Q9 of 120

Geo-Scientist Prelims 2024 Chemistry Q9: Atomic size of nitrogen is less than carbon atom, yet carbon shows…

Questionp-block / catenation

Atomic size of nitrogen is less than carbon atom, yet carbon shows maximum catenation property while nitrogen does not. The reason for this is

  1. (a) lone pair-lone pair repulsions in N—N single bond make the bond weaker to allow catenation
  2. (b) catenation is not dependent on atomic size
  3. (c) carbon has poor multiple bonds formation ability
  4. (d) nitrogen exists as an inert gas and therefore does not react

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