2023 Manipur Chemical Bonding and Molecular StructureComparison of dipole moments Medium Question 17 of 108 in Chemical Bonding and Molecular Structure

The correct order of dipole moments for molecules $NH_3$, $H_2S$, $CH_4$ and HF, is:

A $CH_4>H_2S>NH_3>HF$
B $H_2S>NH_3>HF>CH_4$
C $NH_3>HF>CH_4>H_2S$
D $HF>NH_3>H_2S>CH_4$

The answer is D.

Solution

The correct order of dipole moments is $HF>NH_3>H_2S>CH_4$, where $CH_4$, being a perfectly symmetric (non-polar) tetrahedral molecule, has a dipole moment of zero.

Concept Comparison of dipole moments

Chemical Bonding and Molecular Structure in past papers

108 questions from this chapter have appeared across 27 exam years.