Assertion : $P h N_{2}^{+} {B r}^{-}$ couples with N,N-dimethyl aniline (I) but not with 2,6-dimethyl-N,N dimethyl aniline (II). Reason: Due to steric inhibition of resonance, the p-position of (II) is not sufficiently activated for the coupling reaction.

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 A Both assertion and reason are correct and reason is the correct explanation for assertion

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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.

{2n}^{2}

H_{2}

H e

(1 + \frac{P b}{R T})

H_{2}

H e

{SiO}_{2}

{CaCO}_{3}

CaO

{CaCO}_{3}

{SiO}_{2}

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