alleryVan't Hoff factor i > 1 for a solute indicates
ADimerisation of the solute
BFormation of a non-electrolyte
CDissociation of the solute into ions
DA perfectly ideal solution
Answer & Solution
Correct answer: C. Dissociation of the solute into ions
1. Van't Hoff factor i is the ratio of observed to calculated colligative effect.
2. i > 1 implies more particles than the formula suggests: dissociation.
3. Example: NaCl in water gives i ≈ 2 (near complete dissociation into Na⁺ and Cl⁻).
4. Dimerisation gives i < 1; ideal non-electrolyte gives i = 1.
_Source: syllabus Chemistry, Unit 1 "Solutions", §1.7_
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