Published by:
CGP EDU Academic Team
Published on: August 13, 2026
The thermal stability of the hydrides of group 15 follows the order :
Text Solution
Verified by ExpertsThe correct answer is:
B
Down the group the X–H bond length increases with increase in size of atom. So bond dissociation energies decrease and thererfore, thermal stability decrease. Hence the correct decreasing order is NH 3 > PH 3 > AsH 3 > SbH 3 > BiH 3 .
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