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The osmotic pressure of a dilute solution is related to its molarity C and temperature T (R = gas constant) by:
APi = C R / T
BPi = R T / C
CPi = C R T
DPi = C / (R T)
Answer & Solution
Correct answer: C. Pi = C R T
1. Osmotic pressure is proportional to molarity at a given temperature.
2. The relation is $\Pi = C R T$, analogous to the ideal gas equation.
3. Pressure rises with both concentration and temperature, so it is a product of all three.
_Source: NCERT Class 12 Chemistry Ch 1 "Solutions", p.20_
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