Question

For the two compounds $NOF$ and $N{O}_{2}F$ one has resultant dipole moment of $\mu =1.81D$ and the other $\mu =0.47D$. Choose the correct option.

• A. $1.81D$ for $N{O}_{2}F$ and $0.47D$ for $NOF$
• B. $0.47D$ for $N{O}_{2}F$ and $1.81D$ for $NOF$
• C. For both $N{O}_{2}F$ and $NOF$ dipole moment $\mu =1.81D$
• D. For both $N{O}_{2}F$ and $NOF$ dipole moment $\mu =0.47D$

Answer 1

The correct option is B $0.47D$ for $N{O}_{2}F$ and $1.81D$ for $NOF$

$NOF$ has bent shape and $N{O}_{2}F$ has trigonal planar shape with asymmetrical distribution of charge on central atom. The dipole moment in case of $N{O}_{2}F$ is less than $NOF$ due to its asymmetrical shape. Hence, dipole moment of $N{O}_{2}F$ should be $0.47D$ and that of $NOF$ should be $1.81D$.