The order of diffusion of three states of matter is `A gt B gt C`. Identify the true statement regarding A, B and C.

Options

A. The order of density is also the same.
B. The order of compressibility is also the same.
C. The order of intermolecular forces is also the same.
D. The order of rigidity is `B gt C gt A`.

Explanation

To solve the question regarding the order of diffusion of three states of matter (A, B, and C), we need to understand the concept of diffusion and how it relates to the states of matter.

### Step-by-Step Solution:

1. **Understand Diffusion**: Diffusion is the process by which particles spread from an area of high concentration to an area of low concentration. The rate of diffusion depends on the state of matter and the intermolecular forces present.

2. **Identify the States of Matter**: The three states of matter are solids, liquids, and gases. Generally, gases diffuse faster than liquids, and liquids diffuse faster than solids due to the differences in intermolecular forces and particle movement.

3. **Analyze the Given Order**: The order given is A > B > C. This means that substance A diffuses the fastest, followed by substance B, and then substance C diffuses the slowest.

4. **Relate to States of Matter**: Based on the typical behavior of diffusion:
- If A is the fastest, it is likely a gas.
- If B is slower than A but faster than C, it is likely a liquid.
- If C is the slowest, it is likely a solid.

5. **Conclude the True Statement**: Therefore, the true statement regarding A, B, and C can be summarized as:
- A is a gas, B is a liquid, and C is a solid. This aligns with the order of diffusion where gases diffuse faster than liquids, and liquids diffuse faster than solids.

### Final Statement:
Thus, the true statement regarding A, B, and C is that A is a gas, B is a liquid, and C is a solid.

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