alleryFor 0.1 M urea in water, freezing point depression (K_f = 1.86):
A0.186 K (assuming non-electrolyte, m ≈ M for dilute aqueous)
B0.186 K
C1.86 K
D0
Answer & Solution
Correct answer: A. 0.186 K (assuming non-electrolyte, m ≈ M for dilute aqueous)
Urea is non-electrolyte (i = 1).
ΔT_f = K_f × m ≈ 1.86 × 0.1 = 0.186 K. Freezing point lowers from 0°C to -0.186°C.
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