Question

$\mathrm{NH}_3$ and $\mathrm{NF}_3$, both the molecules have pyramidal shape with a lone pair of electrons on nitrogen atom. Why does the dipole moment of $\mathrm{NH}_3$ is greater than that of $\mathrm{NF}_3$?

Accepted Answer

All of the above

Answer

Because $\mathrm{F}$ is more electronegative than $\mathrm{N}$-atom

Answer

Because in $\mathrm{NF}_3$ the orbital dipole is in the direction opposite to the resultant dipole moment of the three $\mathrm{N}-\mathrm{F}$ bonds

Answer

Because in $\mathrm{NH}_3$ the orbital dipole is in the direction same to the resultant dipole moment of the three $\mathrm{N}-\mathrm{H}$ bonds

JEE CHEMISTRY MCQ: CHEMICAL BONDING & MOLECULAR STRUCTURE

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