explain y BeH2 molecule has zero dipole moment although the Be-H bonds are polar...?

The Lewis structure for BeH2 is as follows:

There is no lone pair at the central atom (Be) and there are two bond pairs. Hence, BeH2 is of the type AB2. It has a linear structure.

Dipole moments of each H–Be bond are equal and are in opposite directions. Therefore, they nullify each other. Hence, BeH2 molecule has zero dipole moment.

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the structue of BeH2

  H - Be - H

The bond are polar but the dipole moment e]which is developed towards one hydrogen is cancelled by other and so it dipole moment become zero

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