Hydrogen bond is an example for

Options

A. ion- dipole interaction
B. dipole- dipole intersaction
C. dipole- induced dipole interaction
D. induced dipole - induced dipole interaction

Answer

To solve the question "Hydrogen bond is an example of," we need to analyze the nature of hydrogen bonding and its classification among the given options.

### Step-by-Step Solution:

1. **Understanding Hydrogen Bonding**:
- Hydrogen bonding occurs when a hydrogen atom is covalently bonded to a highly electronegative atom (like fluorine, oxygen, or nitrogen). This creates a dipole moment where the hydrogen atom carries a partial positive charge, and the electronegative atom carries a partial negative charge.

2. **Identifying the Types of Interactions**:
- The question provides four options:
A. Ion-dipole interaction
B. Dipole-dipole interaction
C. Dipole-induced dipole interaction
D. Induced-dipole-induced-dipole interaction

3. **Analyzing Each Option**:
- **A. Ion-dipole interaction**: This occurs between an ion and a polar molecule. This is not applicable for hydrogen bonding.
- **B. Dipole-dipole interaction**: This occurs between two polar molecules that have permanent dipoles. Since hydrogen bonding involves the interaction between the dipoles of molecules (like HF), this is a strong candidate.
- **C. Dipole-induced dipole interaction**: This occurs when a polar molecule induces a dipole in a nonpolar molecule. This is not applicable for hydrogen bonding.
- **D. Induced-dipole-induced-dipole interaction**: This occurs between two nonpolar molecules that induce temporary dipoles in each other. This is also not applicable for hydrogen bonding.

4. **Conclusion**:
- Since hydrogen bonding is a specific type of interaction that involves the attraction between the dipoles of two polar molecules, it is classified as a dipole-dipole interaction. Therefore, the correct answer is **B. Dipole-dipole interaction**.

### Final Answer:
**B. Dipole-dipole interaction**