Question

explain why BeH2 molecules has a zero dipole moment although the Be -H bonds are polar ?

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Answer 1

Because it is linear

Therefore both dipoles align themselves in the opposite direction and thus net dipole moment is zero

Answer 2

Here is your answer ⤵⤵⤵⤵

✔BeH2 molecules has a zero dipole moment because it is a linear molecule. Its resultant dipole moment is zero.

Thanks ☺