The Total solution for NCERT class 6-12
Why is BiH3 the strongest reducing agent amongst allthe hydrides of Group 15elements?
As we move down a group, theatomic size increases and the stability of the hydrides of group 15 elementsdecreases. Since the stability of hydrides decreases on moving from NH3 to BiH3, the reducing character of the hydridesincreases on moving from NH3 to BiH3.