Which of the following can form intermolecular H-bonding between its molecules?

Options

A. `CH_(3)OCH_(3)`
B. `CH_(3)COCH_(3)`
C. `CH_(3)Cl`
D. `N_(2)H_(4)`

Explanation

To determine which of the given compounds can form intermolecular hydrogen bonding between its molecules, we need to analyze the structure of each compound and identify whether hydrogen is bonded to highly electronegative atoms such as fluorine (F), oxygen (O), or nitrogen (N).

### Step-by-Step Solution:

1. **Understanding Hydrogen Bonding**:
- Hydrogen bonding occurs when hydrogen is covalently bonded to a highly electronegative atom (F, O, or N). This creates a polar bond, allowing hydrogen to interact with lone pairs on electronegative atoms in neighboring molecules.

2. **Analyzing CH3OCH3 (Dimethyl Ether)**:
- In CH3OCH3, the hydrogen atoms are bonded to carbon (C) atoms, not to oxygen (O).
- Therefore, this compound cannot form hydrogen bonds.

3. **Analyzing CH3COCH3 (Acetone)**:
- In CH3COCH3, the hydrogen atoms are again bonded to carbon atoms. The oxygen is part of the carbonyl group (C=O) and does not have hydrogen directly bonded to it.
- Thus, hydrogen bonding is not possible in this compound either.

4. **Analyzing CH3Cl (Methyl Chloride)**:
- In CH3Cl, the hydrogen atoms are bonded to carbon, and chlorine (Cl) is not an electronegative atom that can participate in hydrogen bonding with hydrogen.
- Hence, no hydrogen bonding occurs here.

5. **Analyzing N2H4 (Hydrazine)**:
- In N2H4, the structure includes NH2 groups. Here, hydrogen is bonded to nitrogen (N), which is a highly electronegative atom.
- This allows for the possibility of hydrogen bonding between the nitrogen atoms of different hydrazine molecules.

6. **Conclusion**:
- Among the given options, only N2H4 can form intermolecular hydrogen bonding due to the presence of hydrogen atoms bonded to nitrogen.

### Final Answer:
The compound that can form intermolecular hydrogen bonding between its molecules is **N2H4** (Hydrazine).