$15 \%$ aqueous solution of glucose (molecular weight $= 180 \ g/mol$) is isotonic with $8 \%$ aqueous solution containing an unknown non-dissociable solute. What is the molecular weight of the unknown solute?

Given below are two statements:
Statement $I$: $H_2O$ molecules move from the chamber $1$ to chamber $2$.
Statement $II$: The osmotic pressure of a solution prepared by dissolving $50 \text{ mg}$ of potassium sulphate (molar mass = $174 \text{ g/mol}$) in $2 \text{ L}$ of water (at $27^{\circ}C$) is $0.0107 \text{ bar}$. (Given: $R = 0.083 \text{ dm}^3 \text{ bar K}^{-1} \text{ mol}^{-1}$ and assume complete dissociation of electrolyte).
In the light of the above statements, choose the correct answer from the options given below:

Osmotic pressure is $0.0821 \ atm$ at a temperature of $300 \ K$. Find the concentration in $mol/L$.

When the pure solvent diffuses out of the solution through the semi-permeable membrane,then the process is called:

An aqueous solution of $0.6 \% (w/v)$ urea is isotonic with which of the following?

The osmotic pressure of a dilute solution is $7 \times 10^5 \ Pa$ at $273 \ K$. Osmotic pressure of the same solution at $283 \ K$ is . . . . . . . $\times 10^4 \ Nm^{-2}$.