Assertion : Chloral reacts with phenyl chloride to form DDT.
Reason : It is an electrophilic substitution reaction.

Options

A. If both assertion and reason are true and reason is the correct explanation of assertion
B. If both assertion and reason are true but reason is not the correct explanation of assertion
C. If assertion is true but reasonb is false
D. If both assertion and reason are false.

Explanation

To solve the given question, we need to analyze the assertion and reason provided.

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that chloral reacts with phenyl chloride to form DDT (Dichlorodiphenyltrichloroethane).
- Chloral is represented as CCl3CHO, and phenyl chloride is chlorobenzene (C6H5Cl).

2. **Reaction Mechanism**:
- When chloral (CCl3CHO) is heated with phenyl chloride (C6H5Cl) in the presence of a dehydrating agent like H2SO4, a reaction occurs.
- The reaction involves the removal of water (H2O), which indicates that the process is not just a simple substitution but involves dehydration.

3. **Formation of DDT**:
- The reaction leads to the formation of DDT, which has the structure of two benzene rings connected by a trichloroethane group.
- The overall reaction can be summarized as:
\[ 2 \text{C}_6\text{H}_5\text{Cl} + \text{CCl}_3\text{CHO} \xrightarrow{\text{H}_2\text{SO}_4} \text{DDT} + \text{H}_2\text{O} \]

4. **Understanding the Reason**:
- The reason states that the reaction is an electrophilic substitution reaction.
- However, since the reaction involves the removal of water, it is classified as a dehydration reaction, which is an elimination reaction rather than a substitution.

5. **Conclusion**:
- The assertion is correct because chloral does react with phenyl chloride to form DDT.
- The reason is incorrect because the reaction is not an electrophilic substitution reaction; it is a dehydration reaction.

### Final Answer:
- The assertion is true, and the reason is false.