Home/
Competitive Exams/
JEE Main & Advanced/
Chemistry/
p-Block Elements/
Question 760011
JEE Chemistry · Hard

p-Block Elements: JEE Advanced MCQ

Solve this quality-checked JEE multiple-choice question, then review the correct answer and explanation.

Timer-based practiceDetailed answer reviewMobile-friendly flow
JEE AdvancedHardQuestion 760011

Question

The bond angle in NF₃ is less than in NH₃ because:
  1. A
    F is more electronegative, pulling bonding pairs away from N, reducing N−F−N angle
    Correct
  2. B
    N−F bonds are longer
  3. C
    F lone pairs repel more
  4. D
    NF₃ is planar

Correct answer

F is more electronegative, pulling bonding pairs away from N, reducing N−F−N angle

Explanation

In NF₃, F's high electronegativity pulls the N−F bonding electron pairs towards F, reducing electron density near N. This decreases bond-pair repulsions at N → bond angle 102.2° (less than NH₃'s 107°). In NH₃, bonding pairs are closer to N (H is less electronegative).

Review p-Block Elements notesStart timed chapter practice