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Q.

The proper sequence of steps involved in the mono bromination of aniline is

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a

Acylation, Hydrolysis, Bromination

b

Bromination, Acylation, Hydrolysis

c

Hydrolysis, Acylation, Bromination

d

Acylation, Bromination, Hydrolysis

answer is D.

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Detailed Solution

-NH2 group is a highly activation group toward ESR. Even n presence less polar solvents (or) even in presence of non-polar solvent, aniline gives poly substituted products. To control the reactivity of aniline it is converted to acetanilide.

-NH-CO-CH3 group is moderately activating group. Tis is because the lone pair of electrons of nitrogen atom are not only localized on benzene ring but also on -COR group.

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Thus acetanilide on bromination in presence of ethanoic acid gives p-bromo acetamide as major product, Which on hydrolysis gives p-bromo aniline in good yields.

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