A) \[N{{H}_{3}}>P{{H}_{3}}>As{{H}_{3}}>Sb{{H}_{3}}\]
B) \[N{{H}_{3}}<P{{H}_{3}}<As{{H}_{3}}<Sb{{H}_{3}}\]
C) \[P{{H}_{3}}<N{{H}_{3}}<As{{H}_{3}}<Sb{{H}_{3}}\]
D) \[As{{H}_{3}}>N{{H}_{3}}>P{{H}_{3}}>Sb{{H}_{3}}\]
Correct Answer: A
Solution :
Stability of hydrides increases gradually from \[Bi{{H}_{3}}\] to \[N{{H}_{3}}\]. The reason being that the strength of the M-H bond increases due to decrease in the atomic size of the element in this order.
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