Solutions Question 321

Question: 12 g of urea is dissolved in 1 litre of water and 68.4 g of sucrose is dissolved in 1 litre of water. The lowering of vapour pressure of first case is

Options:

A) equal to second

B) greater than second

C) less than second

D) double that of second

Show Answer

Answer:

Correct Answer: A

Solution:

Moles of urea $ =\frac{12}{60}=0.2 $ Moles of sucrose $ =\frac{68.4}{342}=0.2 $ Both are non electrolyte hence lowering of V.P. will be same.



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