JEE Advanced 2012 Chemistry question
For a dilute solution containing 2.5 g of a non-volatile non-electrolyte solute in 100 g of water, the elevation in boiling point at 1 atm pressure is 2 °C. Assuming concentration of solute is much lower than the concentration of solvent, the vapour pressure (mm of Hg) of the solution is (take )
Answer: (A)
Solution
Molality from : mol kg⁻¹. In 1 kg (55.6 mol) of water, the mole fraction of solute is approximately
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