MEDIUMMCQ SINGLENEET ChemistryPhysical ChemistrySolutionsPrevious Year Questions
The following solutions were prepared by dissolving 10 g glucose (C₆H₁₂O₆) in 250 ml of water (P₁) 10 g of urea (CH₄N₂O) in 250 ml of water (P₂) and 10 g of sucrose (C₁₂H₁₂O₁₁) in 250 ml of water (P₃). The right option for the decreasing order of osmotic pressure of these solutions is. (NEET 2021)
A.P₂ > P₃ > P₁
B.P₃ > P₁ > P₂
C.P₂ > P₁ > P₃✓ Correct
D.P₁ > P₂ > P₃
Explanation
n = wRT/MV Here, as the given solutions have the same volume and mass of solute. Thus, the osmotic pressure will decrease with increase in molar mass of solute. Thus, the order should be: P₂ > P₁ > P₃.
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