Question:medium
Which of the following aqueous solutions will have the highest osmotic pressure ?
Which of the following aqueous solutions will have the highest osmotic pressure ?
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More ions → higher $i$ → greater osmotic pressure.
Updated On: Feb 24, 2026
- 1% KCl
- 1% glucose
- 1% urea
- 1% CaCl$_2$
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The Correct Option is D
Solution and Explanation
Osmotic pressure exhibits a direct proportionality to the particle count, as quantified by the van't Hoff factor ($i$). Specifically, CaCl$_2$ dissociates into three ions (one Ca$^{2+}$ and two Cl$^-$), whereas KCl yields two ions. Glucose and urea, conversely, do not ionize. Consequently, CaCl$_2$ generates the greatest number of particles, resulting in the highest osmotic pressure.
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