Assertion :Aryl halides are less reactive towards substitution of halogen atom. Reason: Halogens are o, p -directing in nature.

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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Both Assertion and Reason are incorrect

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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
Aryl halide shows resonance stabilization and thus resistant to substitution reaction. Due to resonance, the C−X bond acquires partial double bond character and becomes shorter and stronger and thus become less reactive towards substitution of the halogen atom.

Aryl halides are o, p - directing in nature.

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ASSERTION: n-Pentane and n-Hexane belong to a homologous series.

REASON: n-Pentane and n-Hexane belong to the same class of hydrocarbons and they differ by a - $C H_{2}$ - group.

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