Which of the following volatile?

Options

A. `CH_(3)CH_(2)CH_(2)NH_(2)`
B. `(CH_(3))_(3)N`
C.
D. `CH_(3)-CH_(2)-OH`

Answer

To determine which of the given compounds is volatile, we need to analyze the boiling points of each compound, as volatility is inversely related to boiling point. A lower boiling point indicates higher volatility.

### Step-by-Step Solution:

1. **Understanding Volatility**:
- Volatility refers to the tendency of a substance to vaporize. A substance is considered volatile if it has a low boiling point, allowing it to evaporate easily.

2. **Analyzing the Compounds**:
- We will examine each option to determine their boiling points and the presence of hydrogen bonding, which affects volatility.

3. **Option 1: CH3CH2CH2NH2 (1-degree amine)**:
- This compound can form hydrogen bonds due to the presence of an NH2 group. Hydrogen bonding increases the boiling point, making it less volatile.

4. **Option 2: CH3N(CH3)2 (3-degree amine)**:
- This is a tertiary amine and does not have hydrogen atoms attached to the nitrogen that can participate in hydrogen bonding. Therefore, it has a lower boiling point and is more volatile compared to the 1-degree amine.

5. **Option 3: CH3NH(CH3) (2-degree amine)**:
- This compound has one hydrogen atom that can participate in hydrogen bonding. While it is less volatile than the tertiary amine, it is still more volatile than the 1-degree amine due to its lower boiling point compared to the 1-degree amine.

6. **Option 4: CH3CH2OH (Ethanol)**:
- Ethanol can also form hydrogen bonds due to the presence of the hydroxyl (OH) group. This results in a higher boiling point, making it less volatile.

7. **Conclusion**:
- Among the options analyzed, the tertiary amine (Option 2: CH3N(CH3)2) has the lowest boiling point and is therefore the most volatile compound.

### Final Answer:
The volatile compound is **Option 2: CH3N(CH3)2 (3-degree amine)**.