Which among the following is strongest reducing agent?
Which among the following is strongest reducing agent?
A. `AsH_(3)`
B. `BiH_(3)`
C. `PH_(3)`
D. `SbH_(3)`
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Correct Answer - B
Among the given hydrides of group 15 elements, `BiH_(3)` is the strongest reducing agent. This is because as we move down the group, bond dissociation enthalpy decreases and thus reducing character increases.
Hence, the order is
`NH_(3)ltPH_(3)ltAsH_(3)ltSbH_(3)ltBiH_(3)`
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