Assertion :Nitrobenzene is used as a solvent in Friedel-Craft's reaction. Reason: Fusion of $p -$ chloronitrobenzene with $K O H$ gives a low yield of a mixture of $p -$ nitro phenoles.

Both Assertion and Reason are correct and Reason is the correct explanation for Assertion

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Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion

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Assertion is correct but Reason is incorrect

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Assertion is incorrect but Reason is correct

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Solution

The correct option is B Both Assertion and Reason are correct but Reason is not the correct explanation for Assertion
Nitrobenzene is used as a solvent in Friedel-Craft's reaction. Nitro $(N O_{2})$ groups strongly deactivate aromatic rings to electrophilic aromatic substitution reactions because they draw electron density away from the ring by resonance, destabilizing the carbocation intermediate. Friedel-Crafts reactions are particularly sensitive to deactivating substituents and cannot occur on molecules with moderate to strong deactivating groups on them.

Due to same effect fusion of p− chloronitrobenzene with $K O H$ gives a low yield of a mixture of p− nitro phenoles. Aryl halides with strong electron-withdrawing groups (such as $N O_{2}$ ) on the ortho or para positions react with nucleophiles to afford substitution products.

Thus, both assertion and reason are correct but reason is not the correct explanation for assertion.

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Assertion :Nitrobenzene is used as a solvent in Friedel-Craft's reaction. Reason: Fusion of p− chloronitrobenzene with KOH gives a low yield of a mixture of p− nitro phenoles.

Assertion :Nitrobenzene is used as a solvent in Friedel-Craft's reaction. Reason: Fusion of $p -$ chloronitrobenzene with $K O H$ gives a low yield of a mixture of $p -$ nitro phenoles.