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Question 600328
JEE Chemistry · Hard

Chemical Bonding: Comparison MCQ

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ComparisonHardQuestion 600328

Question

Bond angle order for NH₃, NF₃, PH₃ is:
  1. A
    NH₃ > NF₃ > PH₃
    Correct
  2. B
    PH₃ > NH₃ > NF₃
  3. C
    NH₃ > PH₃ > NF₃
  4. D
    NF₃ > NH₃ > PH₃

Correct answer

NH₃ > NF₃ > PH₃

Explanation

NH₃ ≈ 107°. NF₃ ≈ 102° (F withdraws electrons by induction, reducing bonding pair repulsion, compressing angle). PH₃ ≈ 93° (P uses mostly unhybridised p-orbitals, smaller angle). Order: NH₃ > NF₃ > PH₃.

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