Solutions Question 61

Question: Molal depression constant for water is 1.86oC . The freezing point of a 0.05 molal solution of a non-electrolyte in water is [MNR 1990; MP PET 1997]

Options:

A) −1.86oC

B) −0.93oC

C) −0.093oC

D) 0.93oC

Show Answer

Answer:

Correct Answer: C

Solution:

ΔTf=Kf×molality=1.86×0.05=0.093 °C Thus freezing point = 0 - 0.093 = −0.093oC .

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