Anilinum hydrogensulphate on heating with sulphuric acid at 453-473K produces

Options

A. Benzene sulphonic acid
B. Anthranilic acid
C. Aniline
D. m-aminobenzene sulphonic acid

Explanation

To solve the question regarding the reaction of Anilinium hydrogen sulfate when heated with sulfuric acid at temperatures between 453-473 K, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants**:
The reactants in this reaction are Anilinium hydrogen sulfate (C6H7N.HSO4) and sulfuric acid (H2SO4).

2. **Understand the Reaction Conditions**:
The reaction is carried out at a temperature range of 453-473 K. This indicates that the reaction may involve some form of dehydration or rearrangement due to the heat.

3. **Analyze the Reaction**:
When Anilinium hydrogen sulfate is heated with sulfuric acid, it undergoes a transformation. The anilinium ion (C6H7N+) can lose a proton (H+) and form aniline (C6H5NH2).

4. **Formation of Aniline**:
The heating leads to the release of water (H2O) and the formation of aniline (C6H5NH2). The sulfate group (HSO4-) can also participate in the reaction.

5. **Formation of Anthranilic Acid**:
As the reaction proceeds, the para-position of the aniline can be substituted by a sulfonyl group (SO3H) from the sulfuric acid, leading to the formation of anthranilic acid (C7H7NO3S).

6. **Final Product**:
Thus, the final products of the reaction are aniline (C6H5NH2) and anthranilic acid (C7H7NO3S).

### Conclusion:
The products formed when Anilinium hydrogen sulfate is heated with sulfuric acid at 453-473 K are aniline and anthranilic acid.