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NEET2017ChemistryGeneral Organic ChemistryActual

Assertion : Thiophene present in commercial benzene as an impurity can be removed by shaking the mixture with cold concentrated H ₂ SO ₄ . Reason : Thiophene is a heterocyclic aromatic compound.

Options

  1. AIf both assertion and reason are true and reason is the correct explanation of assertion.
  2. BIf both assertion and reason are true but reason is not the correct explanation of assertion.
  3. CIf assertion is true but reason is false.
  4. DIf both assertion and reason are false.

Correct answer

B. If both assertion and reason are true but reason is not the correct explanation of assertion.

Step-by-step solution

On shaking with concentrated H ₂ SO ₄ thiophene being more reactive undergoes sulphonation and the thiophene-2-sulphonic acid thus formed dissolves in concentrated H ₂ SO ₄ .

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