Question

Explain why beh2 molecule has zero dipole moment although the be_h bond are polar

Answer 1

the be_h bonds are polar but they are situated at opposite side, so their resultant is zero. The dipole moment is a vector quantity. Do of they are at opposite side and as they are same in quantity because the bonds are same so the neutralize or cancel each other. So beh2 molecule has zero dipole moment.