Even though nitrogen in ammonia is sp3 hybridisation the bond angle deviate from 109°28.Explain
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Nitrogen has a lone pair, which causes bond pair - lone pair distortion and the bond angle is deviated.
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Hope it may help you !!!!!
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❤. The central atom of NH3 molecule is N.
❤. It undergoes sp3 hybridisation.
❤. it contains one lone pair and three bond pairs of electrons.
❤. So its shape should be Tetrahedral with bond angle 109degree 28` .
❤. Bur according to VSEPR theory, repulsion arises between lone pair and bond pair of electrons.
❤. So the bond angle reduces to 107degree and shape changes to pyramidal
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