`H_2O` is dipolar, whereas `BeF_2` is not. It is because

Options

A. `H_2O ` is linear and `BeF_2` is angular
B. `H_2O` is angular and `BeF_2` is linear
C. The electronegativity of F is greater than that of O
D. `H_2O` involves hydrogen bonding whereas `BeF_2` is a discrete molecule

Answer

B

Explanation

The overall value of the dipole moment of a polar molecule depends on its geometry and shape i.e., vectorial addition of dipole moment of the constituent bonds water has angular structure with bond angle 105° as it has dipole moment. However `BeF_2` is a linear molecule since dipole moment summation of all the bonds present in the molecule cancel each other.