Question

$H_2O$ has a net dipole moment while $BeF_2$ has zero dipole moment because

• A. $H_2O$ molecule is linear while $BeF_2$ is bent
• B. $BeF_2$ molecule is linear while $H_2O$ is bent
• C. fluorine has more electronegativity than oxygen
• D. beryllium has more electronegativity than oxygen

Answer 1

Answer: (B)

$H _{2} O$ have bent structure in which the two $O - H$ bonds are oriented at an angle of $104.5^{\circ}$, so water have a net dipole moment whereas $B e F_{2}$ have linear geometry, so the dipole moment of one bond is cancelled by another bond, so it have zero dipole moment.