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Question

Correct order of increasing covalent character is:


A

LiCl > BeCl2 > BCl3 > CCl4

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B

LiCl < BeCl2 < BCl3 < CCl4

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C

LiCl> BeCl2 > CCl4 > BCl3

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D

LiCl < BCl3 < BeCl2 < CCl4

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Solution

The correct option is B

LiCl < BeCl2 < BCl3 < CCl4


All have Cl as anions. No effect from their side.

Cations polarizing power:-

ϕLi = 1rLi ϕBe = 2rBe ϕB = 3rB ϕC = 4rc

As rc is least and its charge is highest.

Thus ϕc is highest. Thus, CCl4 is most covelent.

This is followed by ϕB , ϕBe and ϕLi

The order is LiCl < BeCl2 < BCl3 < CCl4


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