Question

Which among the following molecules is polar?

• A. $C{O}_2$
• B. $S{O}_2$
• C. $BeC{l}_2$
• D.

Answer 1

The correct option is B $S{O}_2$

$C{O}_2$ molecule has a linear shape with $sp$ and it is symmetrical. So, it is non-polar with zero dipole moment.
$S{O}_2$ has 2 sigma bond pairs and one lone pair of electrons. So, its hybridisation is $s{p}^2$ and has a bent shape. So, it has dipole moment and the molecule is polar.



$BeC{l}_2$ is singly bonded to two chlorine atoms and has a hybridisation of $sp$ and the molecule has a linear shape. So, it has zero dipole moment.


In $1,4$ dichloride benzene, the chlorine atoms are placed opposite to each other and therefore the dipole moments will cancel out each other. Hence, it will have zero dipole moment.