Q. Sulfonation of thiophene can be carried out by using______________. (Solved)
1. SO3 +Conc. HCl
2. Dilute Sulphuric acid
3. Concentrated Sulphuric acid
4. SO3 + HNO3
- c. Concentrated Sulphuric acid
1. SO3 +Conc. HCl
2. Dilute Sulphuric acid
3. Concentrated Sulphuric acid
4. SO3 + HNO3