alleryFor benzoic acid dimerising in benzene (2 CH₃COOH ⇌ (CH₃COOH)₂), the van't Hoff factor approaches:
A1
B0
C0.5
D2
Answer & Solution
Correct answer: C. 0.5
For complete dimerisation of 1 mol → 0.5 mol of dimer → **i ≈ 0.5**.
Association reduces particle count, raising experimental molar mass above the true value.
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