The size of the clay particle is less than

Options

A. 0.02 mm
B. 0.002 mm
C. 0.2 mm
D. 2.0 mm

Answer

To determine the size of clay particles, we can follow these steps:

### Step-by-Step Solution

1. **Understand Soil Particle Sizes**: Soil particles can be classified into different categories based on their sizes. The main categories are clay, silt, sand, and gravel.

2. **Identify the Size of Clay Particles**: Clay particles are known to be the smallest among soil particles. According to the classification:
- Clay particles are less than 0.002 mm in diameter.
- Silt particles range from 0.002 mm to 0.05 mm.
- Sand particles range from 0.05 mm to 2.0 mm.
- Particles larger than 2 mm are classified as gravel or stones.

3. **Analyze the Options Provided**: The question asks for the size of clay particles and provides the following options:
- A) 0.02 mm
- B) 0.002 mm
- C) 0.2 mm
- D) 0.0 mm

4. **Compare Options with Clay Particle Size**: Since clay particles are defined as being less than 0.002 mm, we can eliminate options A (0.02 mm), C (0.2 mm), and D (0.0 mm) because they do not accurately represent the size of clay particles.

5. **Select the Correct Option**: The only option that accurately describes the size of clay particles is:
- B) 0.002 mm

### Final Answer
The size of the clay particle is less than **0.002 mm** (Option B).

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