Q. Correct order of decreasing thermal stability is as
A) NH_{3}>PH_{3}>AsH_{3}>SbH_{3}
B) PH_{3}> NH_{3}> AsH_{3}> SbH_{3}
C) AsH_{3}> PH_{3}> NH_{3}> SbH_{3}
D) SbH_{3}> AsH_{3}> PH_{3}> NH_{3}
Explanation
(a)
The thermal stability of the hydrides of nitrogen family or group15 elements decreases on moving downwards in the group. Therefore, NH_{3}is the most stable and BiH_{3}is the least stable. The stability of the hydride of group 15 elements decreases in the order.
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.