In the reaction of p-chlorotoluene with `KNH_(2)` is liguid `NH_(3)` the major product is .

Options

A. o-Toluidine
B. m-Toluidine
C. p-Toluidine
D. p-Chloroaniline

Explanation

To solve the problem of determining the major product in the reaction of p-chlorotoluene with KNH2 in liquid NH3, we can follow these steps:

### Step-by-Step Solution:

1. **Identify the Structure of p-Chlorotoluene**:
- p-Chlorotoluene is a benzene ring with a chlorine (Cl) atom and a methyl (CH3) group attached to it. The chlorine is located at the para position relative to the methyl group.
- The structure can be represented as follows:
```
Cl
|
C6H4 - CH3
```

2. **Understand the Reaction Conditions**:
- The reaction involves the use of KNH2 (potassium amide), which provides the NH2- (amide ion) in liquid ammonia (NH3).
- The amide ion is a strong nucleophile and will attack the aromatic ring.

3. **Formation of Benzyne Intermediate**:
- The chlorine atom is a good leaving group, and under the reaction conditions, it can be displaced, leading to the formation of a benzyne intermediate. This intermediate has a triple bond between two carbon atoms in the benzene ring.
- The reaction can be represented as:
```
p-Chlorotoluene → Benzyne + Cl^-
```

4. **Nucleophilic Attack by NH2-**:
- The NH2- ion can attack the benzyne intermediate at two possible positions: the carbon adjacent to the methyl group (ortho position) or the carbon opposite to the methyl group (meta position).
- The attack at the ortho position would lead to a less stable product due to steric hindrance from the methyl group.

5. **Determine the Major Product**:
- The more stable product will be formed when NH2- attacks the meta position. This is because the negative charge resulting from the nucleophilic attack will be further away from the electron-donating methyl group, leading to increased stability.
- The product formed from the meta attack is called meta-toluidine (or meta-aminotoluene).

6. **Conclusion**:
- The major product of the reaction of p-chlorotoluene with KNH2 in liquid NH3 is **meta-toluidine**.

### Final Answer:
The major product is **meta-toluidine**.