Assertion - Ph- N 2 Br - is more acidic than NH 4 Br- Reason- Ph- N H 3 anilinium ion is resonance stabilised-

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Resonance

Assertion : ...

Question

Assertion : $P h_{2} {B r}^{⊖}$ is more acidic than ${N H}_{4} B r$ . Reason: $P h \oplus N H_{3}$ (anilinium ion) is resonance stabilised.

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 C Assertion is correct but Reason is incorrect
${N H}_{3}$ is a stronger base than aniline. Therefore, the conjugate acid of aniline ( $P h \oplus N H_{3}$ ) is more acidic than the conjugate acid of ${N H}_{3}$ ( $\oplus N H_{4}$ ion).
Resonance is not possible in anilinium ion. Because the charge delocalization may lead to pentavalent structure of nitrogen which is never possible.
Option C is correct.

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Assertion :Ph⊕N2Br⊖ is more acidic than NH4Br. Reason: Ph⊕NH3 (anilinium ion) is resonance stabilised.

Assertion : $P h_{2} {B r}^{⊖}$ is more acidic than ${N H}_{4} B r$ . Reason: $P h \oplus N H_{3}$ (anilinium ion) is resonance stabilised.