Question

Which hydride among the following is the strongest reducing agent?

विकल्प

• AsH₃

• BiH₃

• PH₃

• SbH₃

Answer 1

BiH₃ 

Explanation:

Among the given hydrides of group 15 elements, BiH₃ 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

PH₃ < AsH₃ < SbH₃ < BiH₃