Question

A diatomic molecule has a dipole moment of 1.2 D. If it's bond length is equal to 10${}^{-10}$ m, then the fraction of an electronic charge on each atom will be :

• A. $42\%$
• B. $52\%$
• C. $37\%$
• D. $25\%$

Answer 1

Answer: (D)

$25\%$

Dipole moment $\left(\mu \right)=$ charge $\left(q\right)\times$ distance $\left(d\right)$

$\mu =q\times d$

$1.2\times {10}^{-18}=q\times {10}^{-8}cm$

$q=\frac{1.2\times {10}^{-18}}{{10}^8}=1.2\times {10}^{-10}$

Charge on each atom $=\frac{q}{e}\times 100=\frac{1.2\times {10}^{-10}}{4.8\times {10}^{-10}}\times 100=25\%$

Therefore, option D is correct.