Q. The correct order of reducing abilities of hydrides of V group elements is
A) NH_{3}<PH_{3}<AsH_{3}<SbH_{3}<BiH_{3}
B) NH_{3}>PH_{3}>AsH_{3}>SbH_{3}>BiH_{3}
C) NH_{3}<PH_{3}<AsH_{3}<SbH_{3}<BiH_{3}
D) SbH_{3}> BiH_{3}> AsH_{3}> NH_{3}> PH_{3}
Explanation
(a)
The reducing character of the hydrides of group v elements depends upon the stability of hydrides. With progressive decrease in stability the reducing character of hydrides increases as we move down the group. Thus ammonia being stable has least reducing ability. The order of reducing abilities of V group hydrides is NH_{3}<PH_{3}<AsH_{3}<SbH_{3}<BiH_{3}
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.