First slide

Lewis theory

Question

Which of the following is not a Lewis acid

Easy

A

${CCl}_{4}$
B

${SiCl}_{4}$
C

${SnCl}_{2}$
D

${FeCl}_{3}$

Solution

Maximum covalency of carbon is four;
It cannot expand its valency greater than four;
Thus carbon tetrachloride is not an electron pair acceptor(Lewis acid)

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