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Q.

Statement 1: Thiophene present in commercial benzene as an impurity can be removed by shaking the mixture with cold concentrated H2SO4.Statement 2: Thiophene is a heterocyclic aromatic compound.

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a

Both statements 1 and 2 are correct

b

Statement 1 is correct and statement 2 is incorrect

c

Statement 1 is incorrect and statement 2 is correct

d

Both statements 1 and 2 are incorrect

answer is A.

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Detailed Solution

On shaking with concentrated H2SO4 thiophene being more reactive undergoes sulphonation and the thiophene- 2-sulphonic acid thus formed dissolves in concentrated H2SO4.
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Statement 1: Thiophene present in commercial benzene as an impurity can be removed by shaking the mixture with cold concentrated H2SO4.Statement 2: Thiophene is a heterocyclic aromatic compound.