Identify the products [A] and [B] respectively in the following reaction:
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The high temperature and pressure conditions favor the nucleophilic substitution of chlorine in chlorobenzene, leading to phenol. Oxidation with Na$_2$Cr$_2$O$_7$ then converts phenol to benzoic acid.
To identify products [A] and [B], each reaction step is analyzed.
The starting material is chlorobenzene (C6H5Cl). Reaction with \(\text{NaOH}\hspace{2pt} \text{at} \hspace{2pt} 623 \hspace{2pt} \text{K and} \hspace{2pt} 300 \hspace{2pt} \text{atm}\) proceeds via nucleophilic aromatic substitution. Under these severe conditions, the chlorine atom is substituted by a hydroxyl group, yielding phenol (C6H5OH).
Subsequently, phenol (C6H5OH) undergoes oxidation with \(\text{Na}_{2}\text{Cr}_{2}\text{O}_{7} \hspace{2pt} \text{in} \hspace{2pt} \text{H}_{2}\text{SO}_{4}\). This standard oxidation converts phenol to benzoquinone.
The products are thus:
[A] is phenol (C6H5OH)
[B] is benzoquinone
The correct option corresponds to phenol as the initial product, followed by its oxidation to benzoquinone.
![Identify the products [A] and [B] respectively in the following reaction:](https://images.collegedunia.com/public/qa/images/content/2025_03_17/Screenshot_677f6f511742225539486.png)
