Assertion :Benzene on heating with conc. $H_{2} {S O}_{4}$ gives benzene sulphonic acid which when heated with superheated steam under pressure gives benzene.
Reason: Sulphonation is a reversible process.

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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Assertion is incorrect and Reason is correct

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Solution

The correct option is A Both Assertion and Reason are correct and Reason is the correct explanation for Assertion
Sulfonation is a reversible reaction that produces benzenesulfonic acid by adding sulfur trioxide and fuming sulfuric acid. The reaction is reversed by adding hot aqueous acid to benzenesulfonic acid to produce benzene.

So both assertion and reason are correct and reason is the correct explanation for assertion.
So answer is A.

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Assertion :Benzene on heating with conc. H2SO4 gives benzene sulphonic acid which when heated with superheated steam under pressure gives benzene. Reason: Sulphonation is a reversible process.

Assertion :Benzene on heating with conc. $H_{2} {S O}_{4}$ gives benzene sulphonic acid which when heated with superheated steam under pressure gives benzene.
Reason: Sulphonation is a reversible process.