The number of isomeric amines of molecular formula `C_(4)H_(11)N` which give carbylamine reaction is

Explanation

To determine the number of isomeric amines with the molecular formula C4H11N that can undergo the carbylamine reaction, we need to identify the primary amines that can be formed from this molecular formula. The carbylamine reaction occurs specifically with primary amines (RNH2).

### Step-by-Step Solution:

1. **Identify the Structure of Primary Amines**:
- The primary amines have the general structure RNH2, where R is an alkyl group. For the formula C4H11N, we need to find all possible primary amines.

2. **Count the Carbon Atoms**:
- The molecular formula C4H11N indicates that there are 4 carbon atoms. We can arrange these carbon atoms in different structural forms to create isomers.

3. **List the Possible Isomers**:
- We will consider straight-chain and branched-chain primary amines:
- **Butan-1-amine** (NH2 at the end of a straight chain): CH3-CH2-CH2-CH2-NH2
- **Butan-2-amine** (NH2 on the second carbon): CH3-CH2-CH(NH2)-CH3
- **2-Methylpropan-1-amine** (branched): CH3-CH(NH2)-CH3-CH3
- **2-Methylpropan-2-amine** (branched): CH3-C(NH2)(CH3)-CH3

4. **Identify Primary Amines**:
- Among the listed isomers, we need to identify which of them are primary amines:
- **Butan-1-amine**: Primary amine
- **Butan-2-amine**: Not a primary amine (secondary)
- **2-Methylpropan-1-amine**: Primary amine
- **2-Methylpropan-2-amine**: Not a primary amine (tertiary)

5. **Count the Valid Primary Amines**:
- The valid primary amines that can undergo the carbylamine reaction are:
- Butan-1-amine
- 2-Methylpropan-1-amine

6. **Conclusion**:
- Therefore, the total number of isomeric primary amines of the molecular formula C4H11N that give the carbylamine reaction is **2**.

### Final Answer:
The number of isomeric amines of molecular formula C4H11N which give carbylamine reaction is **2**.