A gaseous molecule AB has observed dipole moment 6.40 D and bond length 210 pm. With e=1.6x10^-19 C and 1 D=3.336x10^-30 C m, its percent ionic character is closest to

JEE Advanced levelSingle correct optionDifficulty 3 of 3cb204

A gaseous molecule $AB$ has observed dipole moment $6.40 D$ and bond length $210 pm$ . With $e = 1.6 \times 1 0^{- 19} C$ and $1 D = 3.336 \times 1 0^{- 30} C m$ , its percent ionic character is closest to

μ_{i o ni c} = e d = 1.6 \times 1 0^{- 19} \times 210 \times 1 0^{- 12} /3.336 \times 1 0^{- 30} = 10.072 D

. Percent ionic character

= 100 \times 6.4/10.072 = 63.54%

, i.e. about 63.5%.