Question
Bond angle in NH3 is more than in H2O. Justify.
✓
Answer
Both NH3 and H2O are sp3 hybridised but there is only one lone pair present on N in NH3 and two lone pairs on O of H2O. Since lone pair-lone pair repulsion is greater than lone pair-bond pair and bond pair-bond pair repulsions, two lone pairs on oxygen push the bond pairs more closer than one lone pair on nitrogen. This leads to smaller bond angle in H2O than in NH3.
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