| Direction (Q. Nos. 55): A solution of sucrose [M (mass) = 342] has been prepared In dissolving 68.4 g of sucrose in 1 kg of water. \[{{K}_{f}}\] for water is \[1.\,86\,kg\,\,mo{{l}^{-1}}\] and vapour pressure of water at 298 K is 0.024 atm. Assume density of the solution is 1 g/mL. |
A) 4.89 atm
B) 0.34 atm
C) 0.24 atm
D) 0.14 atm
Correct Answer: A
Solution :
Osmotic pressure, \[I=\frac{E}{R}=\frac{2}{10}=0.2\,A\] \[\frac{AB}{OA}=\frac{QR}{RB}\] (V = 1L) s\[QR=RB\,\left( \frac{AB}{OA} \right)=4\times \frac{1}{2}=2\,m\]
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