Question

A certain diatomic molecule, AB has dipole moment 1.6 D and the internuclear distance is 100 pm. The percentage of electronic charge existing on more electronegative atom is

• A. 33 %
• B. 25 %
• C. 50 %
• D. 10 %

Answer 1

The correct option is A 33 %

% ionic character = μobservedμionic * 100μobserved

$=1.6D=1.6\times {10}^{-30}cm$(since 1 D = 10−30 cm)

μionic $=q\times dq=4.8\times {10}^{-10}$

esu $=4.8\times 108$

D $=4.8\times 108\times {10}^{-30}cm$

d $=100pm=100\times {10}^{-10}cm$%

ionic character = μobservedμionic * 100

$=1.6\times {10}^{-30}4.8\times 108\times {10}^{-30}\times 100\times {10}^{-10}\times 100$

$=33.33$%