Which of the following is not a Lewis acid?

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Question

(D) Lewis acid is an electron pair acceptor,while a Lewis base is an electron pair donor.$FeCl_3$,$AlCl_3$,and $BCl_3$ have incomplete octets or vacan

Vedclass · Accepted Answer

$NH_3$

Vedclass · Answer

(D) Lewis acid is an electron pair acceptor,while a Lewis base is an electron pair donor.$FeCl_3$,$AlCl_3$,and $BCl_3$ have incomplete octets or vacant d-orbitals,allowing them to accept electron pairs,thus acting as Lewis acids.$NH_3$ contains a nitrogen atom with a lone pair of electrons,which it can donate,making it a Lewis base.Therefore,the correct option is $D$.

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