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What is the product of sulphonation when toluene is heated with fuming sulphuric acid (oleum)?

Options

  1. AToluene sulfonic acid
  2. BBenzoic acid
  3. CPhenol
  4. DBenzyl chloride

Correct answer

A. Toluene sulfonic acid

Step-by-step solution

When toluene is heated with fuming sulphuric acid (oleum), it undergoes sulphonation to form toluene sulfonic acid by replacing a hydrogen atom with a sulphonic acid group.

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