Commercial benzene obtained from coal-tar distillation contains 3-5% thiophene as impurity. Suggest a simple method to purify it.

Explanation

To purify commercial benzene containing 3-5% thiophene as an impurity, we can follow these steps:

### Step-by-Step Solution:

1. **Preparation of Materials**: Gather the necessary materials, which include commercial benzene and concentrated sulfuric acid (H2SO4).

2. **Mixing the Solutions**: In a suitable container, add the commercial benzene to the concentrated sulfuric acid. The ratio can be adjusted based on the amount of benzene you have, but ensure that there is enough sulfuric acid to interact with the thiophene.

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