Question

Which of the following pair is Lewis acid and Lewis base and Product of these is also Lewis base.

• A. $B{F}_3,N{H}_3$
• B. $SiC{l}_4,2C{l}^{-}$
• C. $C{H}_3^{\oplus }{,}^{\ominus }O{C}_2{H}_5$
• D. None of these

Answer 1

The correct option is B $SiC{l}_4,2C{l}^{-}$

answer is B option.

Lewis acid are those which can accept a lone pair and lweis bases are those which can give a lone pair.

thus in SiCl4 ,Si has a d orbital which can accept lone pair.

while Cl negative ion as lone pair which can be donated.

And in product (SiCl6)-2 ,Si has lone apis which can be donated.

thus the correct answer becomes B option.