Van der Waal constant……………..respresent co-volume and…………….represent magnitude of attractive forces.

Explanation

To solve the question regarding the Van der Waals constants, we need to identify which constant represents co-volume and which represents the magnitude of attractive forces.

### Step-by-Step Solution:

1. **Understand the Van der Waals Equation**:
The Van der Waals equation is given by:
\[
\left(P + \frac{a n^2}{V^2}\right)(V - nb) = nRT
...