The boiling points of HF, H2O and NH3 increase in the order of

  • A NH3
  • B H2O < HF
  • C HF < NH3 < H2O
  • D NH3 < HF < H2O

The correct answer is D. NH3 < HF < H2O

Ammonia = -33.34°C;  Hydrogen fluoride = 19.5°C; Water = 100°C

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