Question

Select the correct order of dipole moment.

• A. $B{F}_3<H_{2}O<H_{2}S$
• B. $H_{2}O>B{F}_3>H_{2}S$
• C. $H_{2}S<H_{2}O<B{F}_3$
• D. $B{F}_3<H_{2}S<H_{2}O$

Answer 1

Answer: (D)

$B{F}_3<H_{2}S<H_{2}O$

$B{F}_3$ is symmetric and therefore, its dipole moment is zero.

In case of $H_{2}O$, $O$ is more electronegative and hence, it is more polar. So,the correct order is as follows:

$B{F}_3<H_{2}S<H_{2}O$