The size of particles in suspension , true solution and colloidal solution varies in the order :

Options

A. `suspenison gt colloidal gt true solution`
B. `true solution gt suspension gt colloidal`
C. `suspension gt colloidal = true solution `
D. none of these

Answer

To solve the question regarding the size of particles in suspension, true solution, and colloidal solution, we will analyze the particle sizes in each type of solution step by step.

### Step-by-Step Solution:

1. **Understanding Particle Sizes**:
- **True Solution**: In a true solution, the size of the solute particles is typically less than 1 nanometer (nm). These particles are so small that they cannot be seen with a regular microscope and do not scatter light.
- **Colloidal Solution**: In a colloidal solution, the size of the particles ranges from 1 nm to 1,000 nm. These particles are larger than those in a true solution but still small enough to remain suspended and not settle out under the influence of gravity.
- **Suspension**: In a suspension, the size of the particles is greater than 1,000 nm. These particles are large enough to be seen with the naked eye and will eventually settle out if left undisturbed.

2. **Comparing Sizes**:
- From the definitions, we can establish the following order based on particle size:
- True Solution: < 1 nm
- Colloidal Solution: 1 nm to 1,000 nm
- Suspension: > 1,000 nm

3. **Establishing the Order**:
- Based on the sizes, we can conclude:
- **Suspension > Colloidal Solution > True Solution**
- This means that the size of particles in suspension is the largest, followed by colloidal solutions, and then true solutions having the smallest particles.

4. **Final Answer**:
- Therefore, the correct order of particle sizes from largest to smallest is:
- Suspension > Colloidal Solution > True Solution

### Conclusion:
The correct answer to the question is that the size of particles in suspension, true solution, and colloidal solution varies in the order of:
- **Suspension > Colloidal Solution > True Solution**