Assertion:Benzoyl chloride is used for the preparation of
derivative of tertiary amines
Reason:It forms solid benzoyl derivatives

Options

A. Both Assertion and Reason are true and Reason is the correct explanation of Assertion
B. Both Assertion and Reason are true but Reason is not a correct explanation of Assertion
C. Assertion is true but Reason is false
D. Assertion is false but Reason is true

Explanation

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

### Step-by-Step Solution:

1. **Understanding the Assertion**:
- The assertion states that "Benzoyl chloride is used for the preparation of derivatives of tertiary amines."
- Benzoyl chloride (C6H5COCl) is an acyl chloride that can react with amines.

2. **Analyzing the Reaction**:
- Tertiary amines have the general structure R3N, where R can be any alkyl or aryl group.
- Benzoyl chloride reacts with amines to form amides. However, it is important to note that benzoyl chloride primarily reacts with primary and secondary amines to form amides, not tertiary amines.

3. **Conclusion on the Assertion**:
- Since benzoyl chloride does not effectively react with tertiary amines to form derivatives, the assertion is **false**.

4. **Understanding the Reason**:
- The reason states that "It forms solid benzoyl derivatives."
- When benzoyl chloride reacts with primary amines (like aniline), it forms solid derivatives such as N-phenylbenzamide, which is indeed a solid compound.

5. **Conclusion on the Reason**:
- The reason is **true** because benzoyl chloride does form solid derivatives when it reacts with suitable amines.

6. **Final Evaluation**:
- The assertion is false, while the reason is true. Therefore, the correct answer is that the assertion is incorrect, but the reason is correct.

### Final Answer:
- Assertion: False
- Reason: True