Question

$H_{2}O$ has a net dipole moment but $Be{F}_2$ has zero dipole moment. This is because:

• A. $H_{2}O$ molecule is linear while $Be{F}_2$ is bent
• B. $Be{F}_2$ molecule is linear while $H_{2}O$ is bent
• C. Fluorine is more electronegative than oxygen
• D. Be is more electronegative than oxygen

Answer 1

The correct option is B $Be{F}_2$ molecule is linear while $H_{2}O$ is bent

$H_{2}O$ has a bent shape and is $s{p}^3$ hybridized with two lone pairs. So, it has a net dipole moment. Whereas, $Be{F}_2$ molecule has $sp$ hybridization with a linear geometry. Hence. the dipole moment vectors cancel out each other and have zero dipole moment.