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Question

Arrange in order of increasing dipole movement.

I. Toulene

II. m - dichlorobenzene

III. o - dichlorobenzene

IV. p - dichlorobenzene


A
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B
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C
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D
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Solution

The correct option is B

CH3 of toluene is e donating

In p-dichlorobenze, the dipole moments by each Cl cancel out and thus no net dipole moment exists. Among m and o isomers, Ortho isomer has more net dipole moment.

Toulene has a e donating CH3 group which is weaker than chlorine

So, the order will be:-

IV < I < II < III


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