Question

The HNHangle value is higher than HPH , HAsH, and HSbH angles .Why?​

Answer 1

In HNH bond angle we have bond pair and lone pair angle so due to repulsion L.P and B.P have more angle in between them So it

has more B.A

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Answer 2

It is because 'N' is smaller in size and N-H bond is most polar than sp^3 hybridised whereas in other these in
s-p bonding polaris is higher in NH3 than in other hybrides