Assertion (A): Aniline is more stable than anilinium ion
Reason $(R)$ : Aniline is more resonance stabilised than anilinium ion

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(A) is true but (R) is false

Both (A) and (R) are true and (R) is the correct explanation of (A)

Both (A) and (R) are false

Both (A) and (R) are true and (R) is not the correct explanation of (A)

answer is A.

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Detailed Solution

For aniline,

Question Image

For anilinium ion,

Examine the following two structures for the anilinium ion and choose the correct statement from the ones given below :

So, anuline has 5 resonating structures while anilinium ion has only 3 resonating structures. We know that, Stability of a molecule $α$ Number of resonating structures That means aniline is more stable than anilinium ion due to more resonating structures. Also, the above resonance structures of anilinium ions are hypothetical and not possible because charge dispersion at the ring may involve pentavalent nitrogen structure which is very unstable.

Therefore, aniline is more resonance stabilised than anilinium ion.

Thus, both assertion and reason are true and reason is the correct explanation of assertion.

Hence, option (A) is correct.

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