Give an example of a material used for making a semipermeable membrane for carrying out reverse osmosis.

$x \% (w/v)$ solution of urea is isotonic with $4 \% (w/v)$ solution of a non-volatile solute of molar mass $120 \ g \ mol^{-1}$. The value of $x$ is

Which of the following solutions has the maximum osmotic pressure?

Which of the following pairs of aqueous solutions exhibits the same osmotic pressure at the same temperature? $\left[ \text{Molar mass of urea} = 60 \ g \ mol^{-1}, \text{sucrose} = 342 \ g \ mol^{-1} \right]$

Which of the following has the highest osmotic pressure at $300 \, K$?

Identify the pair of solutions that exhibits the same osmotic pressure. [Molar mass of urea $= 60 \text{ g mol}^{-1}$ and molar mass of glucose $= 180 \text{ g mol}^{-1}$]