Which of the following cannot act as Lewis acid ?

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CCl₄

SiCl₄

GeF₄

None

answer is A.

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Detailed Solution

In CCl₄ the certral atom carbon can't acts as lewis acid, due to lack of empty d-orbitals in its valency shell.

→ Whereas in remaining tetrahalides [SiCl₄, GeF₄, SnCl₄] the central atom contains empty d-orbital in their valency shell and hence they can accept the electron pair from Lewis bases and shows Lewis acidic character.

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