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For a dilute solution containing 2.5 g o...

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 k_b = 0.76 K kg mol^(-1))`.

A

726

B

740

C

736

D

718

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The correct Answer is:
A
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For a dilute solution containing 2.5 g of a non-volatile non-electrolyte solute in 100 g water, the elevation of boiling point at 1 atm pressure is 2°C. Assuming concentration of solute is much lower than the concentration of solvent, determine the vapour pressure (mm Hg) of the solution. [Given: k_b for water = 0.76K-kg- mol^(- 1) ]

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