A: Aniline is not prepared by Gabriel phthalimide synthesis.
R: Due to partial double bond character in haloarene because of resonance.

Options

A. If both Assertion & Reason are true and the reason is the correct explanation of the assertion, then mark (1).
B. If both Assertion & Reason are true but the reason is not the correct explanation of the assertion, then mark (2)
C. If Assertion is true statement but Reason is false, then mark (3)
D. If both Assertion and Reason are false statements, then mark (4)

Answer

To solve the question, we need to analyze both the assertion (A) and the reason (R) provided.

**Assertion (A):** Aniline is not prepared by Gabriel phthalimide synthesis.
**Reason (R):** Due to partial double bond character in haloarene because of resonance.

### Step-by-Step Solution:

1. **Understanding Aniline Structure:**
- Aniline is an aromatic amine with the structure C6H5-NH2, where a phenyl group (C6H5) is attached to an amino group (NH2).

2. **Gabriel Phthalimide Synthesis Overview:**
- The Gabriel phthalimide synthesis is a method used to prepare primary amines. It involves the reaction of phthalimide with a base (like KOH) to form a phthalimide salt, which can then react with an alkyl halide (R-X) to form an amine.

3. **Using Haloarene in Gabriel Synthesis:**
- In the context of this synthesis, if we try to use a haloarene (like phenyl halide) instead of a typical alkyl halide, we need to consider the nature of the bond in haloarene.

4. **Resonance in Haloarene:**
- Haloarenes (like chlorobenzene) exhibit resonance, which gives rise to a partial double bond character between the carbon and halogen (C-X). This resonance stabilizes the C-X bond, making it less reactive.

5. **Implication of Partial Double Bond Character:**
- The partial double bond character means that the bond is stronger and does not break easily. Therefore, when attempting to react haloarene with the nucleophile generated in Gabriel synthesis, no reaction occurs to form aniline.

6. **Conclusion:**
- Since aniline cannot be prepared using Gabriel phthalimide synthesis due to the stability of the haloarene bond (due to resonance), both the assertion (A) and the reason (R) are correct.

### Final Answer:
Both the assertion and reason are correct. Aniline is not prepared by Gabriel phthalimide synthesis due to the partial double bond character in haloarene caused by resonance.

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