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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

1. 3.59 g
2. 3.69 g
3. 4.69 g
4. 2.59 g

Correct answer: 3.69 g

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