Group 15 - Nitrogen Family
The bond angle in ammonia (NH₃) is approximately:
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About This Question
- Subject
- chemistry
- Chapter
- p-block elements
- Topic
- group 15 - nitrogen family
- Difficulty
- Easy
- Year
- 2025
Solution
Correct Answer:
107°
According to VSEPR Theory, the shape of Ammonia (NH3) is predicted by the arrangement of 4 electron pairs around Nitrogen:
- Hybridization: sp3 (expected tetrahedral angle is 109.5∘).
- Lone Pair Effect: Nitrogen has one lone pair. Lone pair-Bond pair (lp-bp) repulsions are stronger than Bond pair-Bond pair (bp-bp) repulsions.
- Result: The N-H bonds are pushed closer together, reducing the bond angle to approximately 107∘. The geometry is Trigonal Pyramidal.
This easy difficulty chemistry question is from the chapter p-block elements, covering the topic of group 15 - nitrogen family. It appeared in the 2025 exam.
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