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9. Amines — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry9. Amines1 Mark
MCQ
What is the correct sequence of reagents used for converting nitrobenzene into $m$ -dibromobenzene?
  • A
    $\stackrel{ NaNO _{2}}{\longrightarrow} / \stackrel{ HCl}{\longrightarrow} / \stackrel{ KBr}{\longrightarrow} /\stackrel{ H^+}{\longrightarrow}$
  • ✓
    $\stackrel{ Br_2/Fe}{\longrightarrow} / \stackrel{Sn/ HCl}{\longrightarrow} / \stackrel{ NaNO_2/ HCl}{\longrightarrow} /\stackrel{ CuBR/Hbr}{\longrightarrow}$
  • C
    $\stackrel{ Sn/ HCl}{\longrightarrow} / \stackrel{KBr}{\longrightarrow} / \stackrel{ Br_2}{\longrightarrow} /\stackrel{ H^+}{\longrightarrow}$
  • D
    $\stackrel{ Sn/ HCl}{\longrightarrow} / \stackrel{Br_2}{\longrightarrow} / \stackrel{ NaNO_2}{\longrightarrow} /\stackrel{ NaBR}{\longrightarrow}$
✓

Answer

Correct option: B.
$\stackrel{ Br_2/Fe}{\longrightarrow} / \stackrel{Sn/ HCl}{\longrightarrow} / \stackrel{ NaNO_2/ HCl}{\longrightarrow} /\stackrel{ CuBR/Hbr}{\longrightarrow}$
b
Correct sequence of reagents for the following conversion.

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