Question

Question 02

Polarity in a molecule and hence the dipole moment depends primarily on electronegativity of the constituent atoms and shape of a molecule. Which of the following has the highest dipole moment?

(a) $C{O}_2$

(b) HI

(c) $H_{2}O$

(d) $S{O}_2$

Answer 1

Answer: (c) $H_{2}O$

$C{O}_2$ being symmetrical has zero dipole moment

$\underset{\mu =0}{O\overleftarrow{-}C\overleftarrow{-}O}$

Among HI, $S{O}_2$ and $H_{2}O$ dipole moment is highest for $H_{2}O$ as in it the central atom contains 2 lone pairs.