If van't Hoff factor is less than unity, this shows that the solute undergoes ……………..in the solution.

Explanation

To solve the question regarding the van't Hoff factor being less than unity, we need to understand what the van't Hoff factor (i) represents in the context of solutions.

### Step-by-Step Solution:

1. **Understanding the Van't Hoff Factor (i)**:
The van't Hoff factor (i) is a measure of the number of particles a solute produces in solution. It is defined as the ratio of the actual number of particles in solution after dissociation to the number of formula units initially dissolved in the solution.

2. **Interpreting i < 1**:
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