The least stable hydride of 15th group elements is
The least stable hydride of 15th group elements is
A. `NH_(3)`
B. `PH_(3)`
C. `AsH_(3)`
D. `BiH_(3)`
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Correct Answer - 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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