A) \[As{{H}_{3}}>P{{H}_{3}}>N{{H}_{3}}\]
B) \[N{{H}_{3}}>P{{H}_{3}}>As{{H}_{3}}\]
C) \[P{{H}_{3}}>N{{H}_{3}}>As{{H}_{3}}\]
D) \[N{{H}_{3}}<As{{H}_{3}}<P{{H}_{3}}\]
E) \[As{{H}_{3}}>N{{H}_{3}}>P{{H}_{3}}\]
Correct Answer: B
Solution :
Stability of the hydrides decreases as the group is descended. So, the correct arrangement of the compound based on the thermal stability is: \[N{{H}_{3}}>P{{H}_{3}}>As{{H}_{3}}\]
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