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1. Solution and colligative properties — Chemistry STD 12 Science — Question

Gujarat BoardEnglish MediumSTD 12 ScienceChemistry1. Solution and colligative properties1 Mark
MCQ
At constant temperature, the osmotic pressure of a solution
  • ✓
    Directly proportional to the concentration
  • B
    Inversely proportional to the concentration
  • C
    Directly proportional to the square of the concentration
  • D
    Directly proportional to the square root of the concentration
✓

Answer

Correct option: A.
Directly proportional to the concentration
a
According to Vant Hoff Boyles Law:

Osmotic pressure ($p$) of a solution at a constant temperature is directly proportional to its concentration $C$ (i.e., moles per litre) $C =\frac{ n }{ V }$

where $n$ is the number of moles of solute present in volume $V$ litres of solution.So osmatic pressure depends on molar mass.

Hence option $A$ and $B$ are correct, remaining does not make any sense so wrong options.

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