What is van’t Hoff factor ? How is it related with :
degree of association

Explanation

### Step-by-Step Solution:

1. **Definition of van’t Hoff Factor (i)**:
The van’t Hoff factor (i) is a measure of the effect of solute particles on the colligative properties of a solution. It is defined as the ratio of the observed colligative property of a solution to the expected colligative property of a solution based on the number of solute particles. Mathematically, it can be expressed as:
\[ i = \frac{\text{Observed colligative property}}{\text{Normal colligative property}} \]

...