P-Block Elements Ques 276

Question: Which is least stable

[MP PET 1989]

Options:

A) $ BiH_3 $

B) $ SbH_3 $

C) $ AsH_3 $

D) $ PH_3 $

Show Answer

Answer:

Correct Answer: A

Solution:

$ PH_3>AsH_3>SbH_3>BiH_3 $ On moving down the group bond energy decreases. Hence, stability decreases.



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