Q. The basic character of hydrides of the V-group elements decreases in the order
A) $NH_{3} > SbH_{3} > PH_{3} > AsH_{3}$
B) $SbH_{3} > AsH_{3} > PH_{3} > NH_{3}$
C) $NH_{3} > PH_{3} > AsH_{3} > SbH_{3}$
D) $SbH_{3} > PH_{3} > AsH_{3} > NH_{3}$
Explanation
(c)
$NH_{3} > PH_{3} > AsH_{3} > SbH_{3}$
On moving down the group atomic size increases and availability of lone pair decreases hence basic character decreases
Reviewed by Dr. Abubacker
Physics Educator & NEET/JEE Specialist
Ph.D. in Physics with 19+ years of teaching experience.