MCQ
Thiophene and benzene are separated by
- ASulphonation of thiophene
- ✓Sulphonation of benzene
- CNitration of thiophene
- DNitration of benzene
✓
Answer
Correct option: B.
Sulphonation of benzene
b
Probably the most convenient method is to use the fact that thiophene is highly reactive toward sulfonation.
Probably the most convenient method is to use the fact that thiophene is highly reactive toward sulfonation.
Shaking a mixture of benzene and thiophene with sulfuric acid at room temperature causes sulfonation of the thiophene but leaves the benzene untouched.
The thiophene sulfonic acid dissolves in the sulfuric acid layer, which you can separate.
You can then wash, dry, and distill the benzene in the usual way.
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