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Although geometries of NH3 and H2O molecules are distorted tetrahedral, bond angle in water is less than that of ammonia. Discuss.

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NH3 → \(\overset{..}{N}H_3\)

H2O → \(H_2\overset{..}{O:}\)

Because of two lone pair of electrons on O – atom, repulsion on bond pairs is greater in H2O in comparison to NH3. Thus, the bond angle is less in H2O molecules.

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