Igcse Model Questions Vol1 2025 Chemistry Question 10

Practice objective / multiple choice question 10 from the 2025 Igcse Model Questions Vol1 Chemistry examination.

Igcse Model Questions Vol1 2025 Chemistry Objective / Multiple Choice Medium Difficulty
Question 10 IGCSE_MODEL_QUESTIONS_VOL1 • 2025 • CHEMISTRY • objective
Igcse Model Questions Vol1 2025 Chemistry Question 10 diagram

The diagram shows the Lewis structure of ammonia (NH\(_3\)). Using VSEPR theory, determine the approximate H-N-H bond angle and explain why it differs from the ideal tetrahedral angle.

Answer Options

A. Approximately 104°, because the lone pair on nitrogen repels the bonding pairs, widening the H-N-H angles above the ideal tetrahedral value.
Correct Answer B. Approximately 107°, because the lone pair on nitrogen compresses the H-N-H angles below the ideal tetrahedral value.
C. Approximately 120°, because the molecule adopts a trigonal planar geometry due to sp2 hybridization.
D. Approximately 109.5°, because the lone pair on nitrogen expands the H-N-H angles to the ideal tetrahedral value.
Correct Answer
B
Correct Option:
Approximately 107°, because the lone pair on nitrogen compresses the H-N-H angles below the ideal tetrahedral value.

About This Question

This is Igcse Model Questions Vol1 2025 Chemistry Question 10. It is one of the objective questions from the 2025 Igcse Model Questions Vol1 Chemistry examination.

Difficulty level: Medium .

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