Question

H2O is polar whereas BeF2 is not. Why?

Answer 1

in BeF2 the dipole moment is zero as BeF2 is linear is shape.

whereas H2O has a net dipole moment which is caused due to the bond moment and the lone pair moment .

therefore H2O is polar whereas BeF2 is not.

Answer 2

$H_2 O$ has a high bond when compared with $BeF_2$. Hence $H_2 O$ is polar $BeF_2$ is non-polar.

Explanation:

• The polar molecule mainly depends on its shape and molecular structure. For $H_2 O$ it is vertical and hence it is a polar molecule. $H_2 O$ has no dipolar moment and it has a long pair moment.
• $BeF_2$ is the linear shape and hence it has a dipole moment. But $H_2 O$ has no dipolar moment and it has a long pair moment.

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