Question

Which of the following molecules has the highest dipole moment?

• A. $H_{2}S$
• B. $C{O}_2$
• C. $CC{l}_4$
• D. $B{F}_3$

Answer 1

The correct option is A $H_{2}S$

$C{O}_2$ is a linear, symmetrical molecule and hence, the dipole moment of $C=$O bond gets cancelled.
$CC{l}_4$ is tetrahedral and symmetrical molecule and hence, net sum of dipole moments becomes zero.
$B{F}_3$ is planar with all three dipoles at ${120}^o$ with each other, so the net vector sum is zero.

Only $H_{2}S$ is a polar molecule with the highest dipole moment.