Question

Among the following gases, find the number of gases that are polar, planar as well as having the greenhouse effect.
(i) Water vapour
(ii) Carbon dioxide
(iii) Nitrogen
(iv) Methane
(v) Nitrous oxide
(vi) Ozone
(vii) Sulphur dioxide

Answer 1

$C{O}_2$ is a non-polar molecule.
$C{H}_4$ is not planar and it has zero dipole moment, hence, it is non-polar.
$N_2$ has no dipole moment and it is not a greenhouse gas.
$S{O}_2$ is not a greenhouse gas
$H_{2}O,N_{2}O$ and ozone are polar, planar and greenhouse gases.
So, the answer is 3