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The least stable hydride of 15^(th) grou...

The least stable hydride of `15^(th)` group elements is __________.

A

`NH_(3)`

B

`PH_(3)`

C

`AsH_(3)`

D

`BiH_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D

As we move from `NH_(3)` to `BiH_(3)`, size of the central atom increases and its tendency to form covalent bond with comparatively small H-atom decreases. Hence, stability decreases down the group.
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