A) \[B{{F}_{3}}\]
B) \[N{{F}_{3}}\]
C) \[C{{l}^{-}}\]
D) \[{{H}_{2}}O\]
Correct Answer: A
Solution :
Electron acceptors are Lewis acids. They are electron deficient compounds.\[B{{F}_{3}}\]is Lewis acid because\[B\]has only 6 electrons in its valence shell and it can accept electrons.\[N{{F}_{3}}\],\[C{{l}^{-}}\] and\[{{H}_{2}}O\]have lone pair of electrons. Thus, they are electron donors and Lewis bases.
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