the interaction energy of London force is inversely proportional to sixth power of the distance between two interaction particles but their magnitude depends upon

Options

A. charge of interacting particles
B. mass of interacting particles
C. polarisability of interacting particles
D. strength of permanent diploes in the particles .

Explanation

To solve the question regarding the interaction energy of London forces and the factors that influence their magnitude, we can break down the explanation into clear steps.

### Step-by-Step Solution:

1. **Understanding London Forces**:
- London forces, also known as dispersion forces, are a type of van der Waals force that arise due to temporary dipoles formed when electron clouds around atoms or molecules become distorted.

2. **Relationship with Distance**:
- The interaction energy of London forces is inversely proportional to the sixth power of the distance between the interacting particles. This means that as the distance increases, the strength of the London forces decreases rapidly.

3. **Factors Influencing Magnitude**:
- The magnitude of London forces depends on several factors:
- **Charge of Interacting Particles**: While the charge can influence interactions, it is not the primary factor for London forces.
- **Mass of Interacting Particles**: The mass does not directly affect the strength of London forces.
- **Polarizability of Interacting Particles**: This is a key factor. Polarizability refers to the ability of the electron cloud of a particle to be distorted, which enhances the strength of London forces.
- **Strength of Permanent Dipoles**: While permanent dipoles can influence interactions, they are not directly related to London forces, which are temporary.

4. **Conclusion**:
- The primary factor that determines the magnitude of London forces is the **polarizability of the interacting particles**. Larger and more complex molecules have greater polarizability due to their more extensive and easily distorted electron clouds.

### Final Answer:
The magnitude of London forces depends primarily on the **polarizability of interacting particles**.

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