Calculate $\Delta \mathrm{T}_{\mathrm{b}}$ of 0.02 m solution if molal elevation constant for solvent is $0.52 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$.

Calculate the mass of solute dissolved in $1 \mathrm{dm}^3$ water has osmotic pressure 3.0 atm at 300 K [Molar mass of solute $=41 \mathrm{~g} \mathrm{~mol}^{-1}$, $\mathrm{R}=0.082 \mathrm{dm}^3 \mathrm{~atm} \mathrm{~K} \mathrm{~K}^{-1} \mathrm{~mol}^{-1}$ ]

Calculate the Henry's law constant at $25^{\circ} \mathrm{C}$ if solubility of gas in liquid is $2.1 \times 10^{-2} \mathrm{~mol} \mathrm{dm}^{-3}$ at 0.18 bar.

Which from following is an example of solution of solid as solute and liquid as solvent?