Which of the following is $NOT$ used as a semipermeable membrane?

Osmotic pressure of a solution containing $0.1 \ mol$ of solute per litre at $273 \ K$ is (in $atm$):

Which of the following pairs of solutions can be isotonic at the same temperature?

$0.6 \ g$ of a solute is dissolved in $0.1 \ L$ of a solvent which develops an osmotic pressure of $1.23 \ atm$ at $27 \ ^\circ C$. The molecular mass of the substance is ........ $g \ mol^{-1}$.

At $27^{\circ}C$,a solution containing $2.5 \ g$ of solute in $250.0 \ mL$ of solution exerts an osmotic pressure of $400 \ Pa$. The molar mass of the solute is $.............. \ g \ mol^{-1}$ (Nearest integer) (Given: $R = 0.083 \ L \ bar \ K^{-1} \ mol^{-1}$)

The osmotic pressure of a dilute solution of a non-volatile solute is