Trichloroacetaldehyde, `C Cl_(3)CHO` reacts with chlorobenzene in presence of sulphuric acid and produces.

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Answer

To solve the problem of the reaction between trichloroacetaldehyde (CCl3CHO) and chlorobenzene in the presence of sulfuric acid, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Reactants:**
- The reactants are trichloroacetaldehyde (CCl3CHO) and chlorobenzene (C6H5Cl).
- Trichloroacetaldehyde has the structure Cl3C-CHO, where Cl3C is a trichloromethyl group attached to an aldehyde functional group.

2. **Understand the Role of Sulfuric Acid:**
- Sulfuric acid (H2SO4) acts as a dehydrating agent in this reaction. It helps in the removal of water (H2O) during the reaction process.

3. **Set Up the Reaction:**
- The reaction can be represented as:
\[ \text{CCl}_3\text{CHO} + 2 \text{C}_6\text{H}_5\text{Cl} \xrightarrow{\text{H}_2\text{SO}_4} \text{Product} \]

4. **Formation of the Product:**
- When trichloroacetaldehyde reacts with chlorobenzene in the presence of sulfuric acid, a condensation reaction occurs.
- The aldehyde group (CHO) reacts with the chlorobenzene, leading to the formation of a new carbon-carbon bond and the elimination of a water molecule.
- The resulting product has the structure of dichlorodiphenyl trichloroethane (DDT), which can be represented as:
\[ \text{CCl}_3\text{C}(\text{C}_6\text{H}_4\text{Cl})_2 \]
- This structure indicates that the trichloromethyl group (CCl3) is attached to a carbon that is also bonded to two chlorobenzene rings.

5. **Final Product Identification:**
- The final product formed from this reaction is DDT (dichlorodiphenyltrichloroethane).

### Conclusion:
The product formed from the reaction of trichloroacetaldehyde with chlorobenzene in the presence of sulfuric acid is DDT (dichlorodiphenyltrichloroethane).