A) \[B{{F}_{3}}\]is base,\[N{{H}_{3}}\]is acid
B) \[N{{H}_{3}}\]is base,\[B{{F}_{3}}\]is acid
C) Both are acid
D) Both are base
Correct Answer: B
Solution :
According to Lewis base is electron donor and acid is electron acceptor. \[\underset{donor}{\mathop{{{H}_{3}}N_{\bullet }^{\bullet }}}\,\xrightarrow[{}]{{}}\underset{acceptor}{\mathop{B{{F}_{3}}}}\,\] Hence,\[N{{H}_{3}}\]is base while\[B{{F}_{3}}\]is acid.
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