NEET · Chemistry · STD 11 - 4. Chemical bonding and molecular structure
Which of the following molecules has the maximum dipole moment ?
- A \(CO_2\)
- B \(CH_4\)
- C \(NH_3\)
- D \(NF_3\)
Answer & Solution
Correct Answer
(C) \(NH_3\)
Step-by-step Solution
Detailed explanation
\(\mathrm{CO}_{2}\) 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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