If van't Hoff factor i=1,then

Options

A. it is dissociation
B. It is association
C. Both 1 and 2
D. Neither dissociation nor association

Answer

To solve the question "If van't Hoff factor i=1, then...", 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 defined as the ratio of the number of particles in solution after dissociation or association to the number of particles in the original solution before dissociation or association.
- Mathematically, it can be expressed as:
\[ i = \frac{\text{Number of particles after dissociation or association}}{\text{Number of particles before dissociation or association}} \]

2. **Analyzing the Case where i = 1**:
- If \( i = 1 \), it indicates that the number of particles in solution after dissociation or association remains the same as the number of particles initially present.
- This means that there is no change in the number of particles, implying that no dissociation or association has occurred.

3. **Conclusion**:
- Therefore, if the van't Hoff factor \( i = 1 \), it means that the solute does not dissociate into ions or associate to form larger particles. This is typically the case for non-electrolytes, which do not ionize in solution.

### Final Answer:
If van't Hoff factor \( i = 1 \), then there is no dissociation or association of solute particles in the solution.

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