Discussion Forum



1)

Which hydride among the following is the strongest reducing agent?


A) $AsH_{3}$

B) $BiH_{3}$

C) $PH_{3}$

D) $SbH_{3}$

Answer:

Option B

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 

  NH3  < PH3 < AsH3  < SbH3  < BiH3