AIIMS 2018 Chemistry Molecular Geometry MCQ Question with Solution

Correct order of bond angle is:

A

$\text{SO}_{2}$ < $\text{H}_{2}\text{S}$

B

$\text{SO}_{2}$ < $\text{H}_{2}\text{O}$

C

$\text{NH}_{3}$ < $\text{H}_{2}\text{O}$

D

$\text{NH}_{3}$ < $\text{SO}_{2}$

Correct Answer

Option D

Detailed Explanation

Option D is correct because the bond angles in the given compounds do not follow a consistent order due to the influence of lone pairs and molecular geometry. In SO₂, the bond angle is approximately 120° due to its bent shape, while H₂S has a bond angle of about 92°, making option A incorrect. Similarly, H₂O has a bond angle of about 104.5°, which is larger than that of NH₃ (approximately 107°), thus making option C incorrect as well. Understanding the effects of lone pairs on bond angles is crucial for predicting molecular geometry.

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