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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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