A) Nitrogen
B) Bismuth
C) Arsenic
D) Phosphorus
Correct Answer: A
Solution :
All the hydrides of group V elements possess a lone pair of electrons on the central atom and thus behaves as Lewis bases. The basic character, however, decreases as we move down the group from \[N{{H}_{3}}\]to\[Bi{{H}_{3}}\].
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