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JEE Main 202124 FebruaryEvening Shift
Exam
JEE Main
Year
2021
Date
24 February
Shift
Evening Shift
Subject
Chemistry
Chapter
Hydrocarbons

JEE Main 2021 · 24 February · Evening Shift · Chemistry · Hydrocarbons

What is the correct sequence of reagents used for converting...

What is the correct sequence of reagents used for converting nitrobenzene into mm-dibromobenzene?

What is the correct sequence of reagents used for converting nitrobenzene into m -dibromobenzene?

Options

  1. A→Sn/HCl/→KBr/→Br2/→H+\overset{Sn / HCl}{\to} / \overset{KBr}{\to} / \overset{{Br}_{2}}{\to} / \overset{{H}^{+}}{\to}
  2. B→Br2/Fe/→Sn/HCl/→NaNO2/HCl/→CuBr/HBr\overset{{Br}_{2} / Fe}{\to} / \overset{Sn / HCl}{\to} / \overset{{NaNO}_{2} / HCl}{\to} / \overset{CuBr / HBr}{\to}
  3. C→NaNO2/→HCl/→KBr/→H+\overset{{NaNO}_{2}}{\to} / \overset{HCl}{\to} / \overset{KBr}{\to} / \overset{{H}^{+}}{\to}
  4. D→Sn/HCl/→Br2/→NaNO2/→NaBr\overset{Sn / HCl}{\to} / \overset{{Br}_{2}}{\to} / \overset{{NaNO}_{2}}{\to} / \overset{NaBr}{\to}

Correct answer

B. →Br2/Fe/→Sn/HCl/→NaNO2/HCl/→CuBr/HBr\overset{{Br}_{2} / Fe}{\to} / \overset{Sn / HCl}{\to} / \overset{{NaNO}_{2} / HCl}{\to} / \overset{CuBr / HBr}{\to}

Step-by-step solution

The process of conversion of primary aromatic amines into its diazonium salt is called diazotization.

Diazonium salts are important synthetic intermediates that can undergo coupling reactions to form azo dyes and electrophilic substitution reactions to introduce functional groups.

The correct sequence of reagents used for converting nitrobenzene into m- dibromobenzene is found in option (b).

What is the correct sequence of reagents used for converting nitrobenzene into m -dibromobenzene?

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