Question

BeH2 molecule has zero dipole moment although the Be-H bonds are polar”explain

Answer 1

in BeH2 bond due to the charge of hydrogen Be attach the both charge of hydrogen by which it cancel out and dipole moment remaining zero.i

Answer 2

Even though BeH2 won't be alone still it's hybridisation is so giving a linear structure. So the hydrogen on either sides pulls the Be in equal amount there by negleting the dipole movement.