Why bond angle in water is less that that of ammonia although their geometries are distorted tetrahedral?
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Solution
Here, NH3 has only one lone pair and water has two lone pairs.
The two lone pairs present in the oxygen atom of the water molecule repel the two bond pairs. This repulsion present in the oxygen atom is more than that of NH3 where one lone pair and three bond pair are present on the nitrogen atom.
thus, the repulsion on the bond pair in H2O molecule is greater then the NH3, the bond angle in H2O is less than that of NH3.