Question

Which of the following does not act as lewis acid?

• A. $B{F}_3$
• B. $SnC{l}_4$
• C. $CC{l}_4$
• D. $S{F}_4$

Answer 1

The correct option is C $CC{l}_4$

Lewis acid is defined as electron pair acceptor.

$B{F}_3,SnC{l}_4,S{F}_4$ have empty orbitals & can accept a pair of electrons.

But $CC{l}_4$ has no vacant $d$-orbitals & does not accept electrons. Hence it is not a Lewis acid.