In Vander Waal's equation of state of the gas law, the constant 'b' is a measure of

Options

A. Intermoleculer repulsions
B. Intermolecular collisions per unit volume
C. Volume occupied by the molecules
D. Intermolecular attraction

Answer

To solve the question regarding the Van der Waals equation of state and the constant 'b', we can follow these steps:

### Step-by-Step Solution:

1. **Understand the Van der Waals Equation**:
The Van der Waals equation is given by:
\[ \left(P + \frac{a}{V^2}\right)(V - b) = RT \]
where:
- \( P \) = pressure of the gas
- \( V \) = volume of the gas
- \( T \) = temperature of the gas
- \( R \) = universal gas constant
- \( a \) and \( b \) = Van der Waals constants

2. **Identify the Role of Constant 'b'**:
In the Van der Waals equation, the constant 'b' accounts for the volume occupied by the gas molecules themselves. It represents the finite size of the gas particles, as real gas molecules occupy space and cannot be compressed to zero volume.

3. **Conclusion**:
Therefore, the constant 'b' in the Van der Waals equation is a measure of the volume occupied by the gas molecules.

### Final Answer:
The constant 'b' is a measure of the volume occupied by the gas molecules.

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