Osmotic pressure of a solution can be measured quickly and accurately by

Which of the following pairs of solutions is isotonic?

$A$ solution containing $4 \ g$ of a non-volatile organic solute per $100 \ mL$ has an osmotic pressure of $500 \ cm$ of mercury at $27^\circ C$. What is the molar mass of the solute?

Calculate the osmotic pressure of a $20\%$ (w/v) anhydrous $CaCl_2$ solution at $0^\circ C$. Assume $100\%$ ionization. (in $\text{atm}$)

The process in which solvent molecules pass through a semipermeable membrane is called:

The osmotic pressure of a $5\%$ (wt/vol) solution of cane sugar at $150\,^{\circ}C$ is $......... \ atm$.