Question:
Which of the following reaction/s will not give \(p-\) aminoazobenzene?
Which of the following reaction/s will not give \(p-\) aminoazobenzene?
Updated On: Dec 30, 2025
- $A$ only
- $B $ only
- $C$ only
- $A$ and $B$
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The Correct Option is B
Solution and Explanation
To determine which reactions will not give \(p-\)aminoazobenzene, let's analyze each option:
- Option A:
- The starting compound is nitrobenzene.
- Step (i) reduces nitrobenzene to aniline using \(\text{Sn/HCl}\)
- .
- Step (ii) forms a diazonium salt with \(\text{HNO}_2\).
- Step (iii) involves coupling with aniline, forming \(p-\)aminoazobenzene.
- Option B:
- The starting compound is nitrobenzene.
- Step (i) attempts reduction using \(\text{NaBH}_4\), which does not reduce nitrobenzene effectively to form aniline.
- Because the reduction is ineffective, further steps are rendered irrelevant for forming \(p-\)aminoazobenzene.
- Option C:
- The starting compound is aniline.
- Step (i) forms a diazonium salt with \(\text{HNO}_2\).
- Step (ii) involves coupling with aniline, forming \(p-\)aminoazobenzene.
Based on the analysis, only Option B will not give \(p-\)aminoazobenzene.
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