Question

The study of diple
moment of a molecule is useful to explain the
shape of a molecule and also to predict a
The net dipole moment of a polyatomic
molecule is the resltant of the different bond
moments present in that molecule . The values
are generalluy expressed in Debye or in the S.I.
units in terms of Coulomb meter (C m)
A covalent molecule , X-Y is found to have a
dipole moment of ` 1.5 xx10^(-29)` C m and a bond
length of 150 pm . The per cent ionic character of the bond will be
A. `50%`
B. `62.5%`
C. `75%`
D. `90%`

Answer 1

Correct Answer - B
`mu_("calculated")=(1.602 xx10^(-19) C) xx (150 xx 10^(-12)m)`
` = 2.4 xx 10^(-29) `C m
`mu_("calculated")=1.5 xx10^(-29) C m`
`therefore % ` ionic character `=(1.5 xx10^(-29) ) / (2.4xx 10^(-29)) xx100 = 62.5%`