First slide

Polarity of the bond and Dipolemoment

Question

Which of the following molecules has the maximum dipole moment?

Moderate

A

${CO}_{2}$
B

${CH}_{4}$
C

${NH}_{3}$
D

${NF}_{3}$

Solution

In ${NH}_{3}$ is less electronegative than N and hence dipole moment of each N-H bond is towards N and create high net dipole moment whereas in ${NF}_{3}$ , F is more electronegative than N, the dipole moment of each N-F bond is opposite to that of lone pair, hence reducing the net dipole moment.

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