Solutions Question 51

Question: The boiling point of a solution of 0.1050 gm of a substance in 15.84 gram of ether was found to be $ 100^{o}C $ higher than that of pure ether. What is the molecular weight of the substance [Molecular elevation constant of ether per 100 g = 21.6] [UPSEAT 2001]

Options:

A) 144.50

B) 143.18

C) 140.28

D) 146.66

Show Answer

Answer:

Correct Answer: B

Solution:

$ m=\frac{K_{b}\times w\times 1000}{\Delta T_{b}\times W}=143.18 $



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