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Question

Which order is correct for the decreasing reactivity to ring monobromination of the following compounds

C6H5CH3I,C6H5COOHII,C6H6III,C6H5NO2IV

A
I > II > III > IV
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B
I > III > II > IV
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C
II > III > IV > I
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D
III > I > II > IV
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Solution

The correct option is B I > III > II > IV

b)
Methyl group activates the benzene ring towards bromination. Whereas electron withdrawing groups like COOH and NO2 deactivate the ring.


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