Account for the following : BiH_(3) is the strongest reducing agent in Group 15 element hydrides.

Account for the following : BiH_(3) is the strongest reducing agent i

1.	Account for the following : BiH_(3) is the strongest reducing agent in Group 15 element hydrides.
Answer» Solution :As we move down the GROUP from N to Bi, the size of the element increases. As a result, bond LENGTH increases and bond strength decrease from N to Bi. In other words, Bi-H bond is the weakest and hence decomposes, on heating, to liberate `H_(2)` most readily. Thus, `BiH_(3)` is the strongest reducing agent in group 15 element hydrides.