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The least stable hydride of 15th group elements is

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By Expert Faculty of Sri Chaitanya
ctaimg
a
NH3
b
PH3
c
AsH3
d
BiH3
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detailed solution

Correct option is D

As we move from NH3 to BiH3, 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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