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If the experimental van't Hoff factor (i) for an electrolyte solution is less than the theoretical value, this indicates
Acomplete dissociation (typical)
Bideal behaviour
Cvapour pressure increase
Dassociation of solute particles
Answer & Solution
Correct answer: D. association of solute particles
1. Theoretical i_max for an electrolyte equals the number of ions per formula unit.
2. If observed i is smaller, fewer particles than expected exist in solution.
3. This is explained by ion association (or molecular association of the solute).
_Source: Maharashtra Balbharati Std XII Chemistry, Ch 2 "Solutions" §2.8_
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