Collidal solution is a heterogeneous solution which contains particle of intermediate size, i.e., (diameter between 1 and 1000 nm) colloidal is not a substance but it is a state of a substance which depends upon the molecular size. Colloidal solutions are intermediate between ture solution and suspensions.
The colloidal particle can pass through

Options

A. Filter paper as well can pass through Animal Membrane
B. Animal membrane but not through filter paper.
C. Filter paper but not through animal membrane.
D. Neither filter paper nor animal membrane.

Answer

**Step-by-Step Solution:**

1. **Understanding Colloidal Solutions:**
- A colloidal solution is a heterogeneous mixture where the particle size ranges from 1 to 1000 nanometers (nm). This size range is crucial in determining the behavior of colloidal particles.

2. **Comparison with Other Solutions:**
- Colloidal solutions are intermediate between true solutions and suspensions.
- True solutions have particles that are smaller than 1 nm and cannot be seen with the naked eye, and they pass through all types of filters.
- Suspensions contain larger particles (greater than 1000 nm) that can settle down and can be separated by filtration.

3. **Behavior of Colloidal Particles:**
- Since colloidal particles are larger than the particles in true solutions, they cannot pass through semipermeable membranes (like animal membranes).
- However, they are smaller than the particles in suspensions, which allows them to pass through filter paper.

4. **Conclusion:**
- Based on the above understanding, colloidal particles can pass through filter paper but cannot pass through animal membranes.

5. **Final Answer:**
- Therefore, the correct answer is that colloidal particles can pass through filter paper but not through animal membranes.