MCQ
Which of the following molecules has the maximum dipole moment ?
- A$CO_2$
- B$CH_4$
- ✓$NH_3$
- D$NF_3$
✓
Answer
Correct option: C.
$NH_3$
c
$\mathrm{CO}_{2}$ and $\mathrm{CH}_{4}$ have zero dipole moment as these are symmetrical in nature.
$\mathrm{CO}_{2}$ and $\mathrm{CH}_{4}$ have zero dipole moment as these are symmetrical in nature.
Between $N H_{3}$ and $N F_{3}, N F_{3}$ has greater dipole mough in $N H_{3}$ and $N F_{3}$ both, $N$ possesses one lone pair of electrons.
This is because in case of $N H_{3},$ the net $N$ - $H$ bond dipole is in the same direction as the direction of dipole of lone pair but in case of $N F_{3},$ the direction of net bond dipole of three- $N-F$ bonds is opposite than that of the dipole of the then lone pair.
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