Which inorganic precipitate acts as a semipermeable membrane,or what is the chemical composition of a semipermeable membrane?

The osmotic pressure of which solution is maximum? (Consider that a $0.1 \ M$ solution of each is $90\%$ dissociated.)

Which of the following solutions will not show flow of solvent in either direction when separated by a semipermeable membrane?

$18 \ g$ glucose (Molar mass $= 180 \ g/mol$) is dissolved in $100 \ mL$ of water at $300 \ K$. If $R = 0.0821 \ L \ atm \ K^{-1} \ mol^{-1}$,what is the osmotic pressure of the solution (in $atm$)?

Which method is used to measure the osmotic pressure of an aqueous solution?

At $300 \, K$,$36 \, g$ of glucose present in a litre of its solution has an osmotic pressure of $4.98 \, bar$. If the osmotic pressure of the solution is $1.52 \, bar$ at the same temperature,what would be its concentration?