Question
Chemistry Question on Solutions
What weight of glucose must be dissolved in 100 g of water to lower the vapour pressure by 0.20 mm Hg?
(Assume dilute solution is being formed)
Given : Vapour pressure of pure water is 54.2 mm Hg at room temperature. Molar mass of glucose is 180 g mol-1 .
A
4.69 g
B
2.59 g
C
3.59 g
D
3.69 g
Answer
3.69 g
Explanation
Solution
The correct option is (D): 3.69 g