Inert gases are mixed in iodine vapours. Then there are _______ between them.

Options

A. H-bonding
B. van der Waals forces
C. Electrostatic forces
D. Metallic bonds

Explanation

To solve the question "Inert gases are mixed in iodine vapours. Then there are _______ between them," we need to analyze the interactions that occur when inert gases are mixed with iodine vapors.

### Step-by-Step Solution:

1. **Understanding Inert Gases**: Inert gases, also known as noble gases (like Helium, Neon, Argon, Krypton, Xenon, and Radon), have a complete valence shell (ns² np⁶ configuration) which makes them very stable and non-reactive under normal conditions.

**Hint**: Consider the electronic configuration of noble gases and their reactivity.

2. **Properties of Iodine Vapors**: Iodine (I₂) is a diatomic molecule that can exist in vapor form. It has a relatively weak intermolecular force due to its molecular structure.

**Hint**: Think about the types of forces that exist between diatomic molecules and other gases.

3. **Types of Intermolecular Forces**: When considering the interactions between inert gases and iodine vapors, we need to identify the types of intermolecular forces that can occur:
- **Hydrogen Bonding**: This occurs between molecules with hydrogen bonded to highly electronegative atoms (like O, N, or F). Not applicable here.
- **Van der Waals Forces**: These are weak attractions that occur between all molecules, including noble gases and iodine vapors.
- **Electrostatic Forces**: These are forces between charged particles. Inert gases are neutral, so this is not applicable.
- **Metallic Bonding**: This occurs in metals and is not relevant here.

**Hint**: Focus on the nature of the interactions between neutral molecules.

4. **Conclusion**: Since inert gases are non-reactive and only exhibit weak interactions, the primary type of force present between inert gases and iodine vapors is **van der Waals forces**.

Therefore, the answer to the question is: **van der Waals forces**.

### Final Answer:
Inert gases are mixed in iodine vapours. Then there are **van der Waals forces** between them.