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(a) In the preparation of p - bromo acet...

(a) In the preparation of p - bromo acetanlllde from acetanilide.
(i) Name the regents used .
(ii) Write the equation for the reaction involved .
(iii) What is the colour of the product obtained .

Text Solution

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(i) Bromine glacial acetic acid

Middle oil fraction is cooled, naphthalene crystallizes. It is removed crude phenol is washed with dilute `H_(2) SO_(4)` and then treated with NaOH solution .
(ii) Sodium phenate formed, in the aqueous layer is separdted, acidified lo regenerate (get) phenol.
`C_(6)H_(5)OH+NaOH rarrC_(6)H_(5)ONa+H_(2)O`
`C_(6)H_(6)ONa+HCI rarr C_(6)H_(5)OH+NaCI`
( For acidification `CO_(2)` or `H_(2)SO_(4)` can be used )
(iii) Orange.
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