Solutions Question 86

Question: If 0.15,g of a solute dissolved in 15,g of solvent is boiled at a temperature higher by 0.216oC than that of the pure solvent. The molecular weight of the substance (molal elevation constant for the solvent is 2.16oC ) is [CBSE PMT 1999; BHU 1997]

Options:

A) 1.01

B) 10

C) 10.1

D) 100

Show Answer

Answer:

Correct Answer: D

Solution:

m=Kb×w×1000ΔTb×W=2.16×0.15×10000.216×15 = 100 .



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