Chemical Bonding and Molecular Structure · JEE Preparation Chemistry

The correct order of increasing bond angle in the given species is:

Practice question from Chemical Bonding and Molecular Structure (JEE Preparation Chemistry), with the correct answer and a step-by-step solution.

medium · MCQ · Q-2B2993

The correct order of increasing bond angle in the given species is:

  1. A.H2O < NH3 < CH4Correct answer
  2. B.NH3 < H2O < CH4
  3. C.CH4 < NH3 < H2O
  4. D.H2O < CH4 < NH3

Solution

Bond angles depend on lone pair-lone pair > lone pair-bond pair > bond pair-bond pair repulsions. H2OH_2O has 2 lone pairs (104.5∘104.5^\circ), NH3NH_3 has 1 lone pair (107∘107^\circ), and CH4CH_4 has 0 lone pairs (109.5∘109.5^\circ). Thus, the increasing order is H2O<NH3<CH4H_2O < NH_3 < CH_4.

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