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A compound ‘P’ on treating with concentrated H2SO4 forms ‘R’. The product ‘R’ on heating at 460K forms a zwitter ionic compound. Identify P, R respectively.

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A compound ‘P’ on treating with concentrated H2SO4 forms ‘R’. The product ‘R’ on heating at 460K forms a zwitter ionic compound. Identify P, R respectively.

(a) Aniline; anilinium hydrogensulphate

(b) Aniline; sulphanilic acid

(c) Anilinium hydrogensulphate; sulphanilic acid

(d) Sulphanilic acid; anilinium hydrogensulphate

I had been asked this question during an online interview.

I want to ask this question from Amines Chemical Reactions topic in division Amines of Chemistry – Class 12

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The correct choice is (a) Aniline; anilinium hydrogensulphate

Easy explanation: Aniline (P) reacts with conc. H2SO4 to form anilinium hydrogensulphate (R) which on heating at 453-473K produces sulphanilic acid (zwitter ionic compound).

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