Identify the false statement.

Options

A. Colloids are homogeneous.
B. Colloids show Tyndall effect.
C. Colloids show Brownian movement.
D. The size of colloidal particles ranges between 1 - 100 nm.

Explanation

To identify the false statement among the given options, we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Statements**: We need to analyze each statement provided in the question to determine which one is false.

2. **Evaluate the First Statement**:
- The first statement claims that "colloids are homogeneous."
- This statement is **false** because colloids are actually **heterogeneous** mixtures. In heterogeneous mixtures, the components are not uniformly distributed.

3. **Evaluate the Second Statement**:
- The second statement claims that "colloids show Tyndall effect."
- This statement is **true**. The Tyndall effect occurs when light is scattered by colloidal particles, making this statement correct.

4. **Evaluate the Third Statement**:
- The third statement claims that "colloids show Brownian movement."
- This statement is also **true**. Brownian movement refers to the zigzag motion of colloidal particles due to collisions with molecules in the dispersion medium.

5. **Evaluate the Fourth Statement**:
- The fourth statement claims that "the size of colloidal particles ranges between 1 to 100 nm."
- This statement is **true**. Colloidal particles typically range in size from 1 nm to 100 nm.

6. **Conclusion**:
- After evaluating all the statements, the only false statement is the first one: "colloids are homogeneous."

### Final Answer:
The false statement is: **"Colloids are homogeneous."**

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