A) \[N{{H}_{3}}>As{{H}_{3}}>P{{H}_{3}}>Sb{{H}_{3}}\]
B) \[Sb{{H}_{3}}>As{{H}_{3}}>P{{H}_{3}}>N{{H}_{3}}\]
C) \[Sb{{H}_{3}}>N{{H}_{3}}>As{{H}_{3}}>P{{H}_{3}}\]
D) \[N{{H}_{3}}>P{{H}_{3}}>As{{H}_{3}}>Sb{{H}_{3}}\]
Correct Answer: C
Solution :
Boiling points of \[Sb{{H}_{3}}(254\ K),\ N{{H}_{3}}(238\ K)\], \[As{{H}_{3}}(211\ K)\] and \[P{{H}_{3}}\ (185\ K)\]therefore boiling points are of the order \[Sb{{H}_{3}}>N{{H}_{3}}>As{{H}_{3}}>P{{H}_{3}}\].
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