Calculate the molality of nonvolatile solution if solution freezes at $-0.95^{\circ} \mathrm{C}$

$\left[K_f\right.$ for water, $=1.86 \mathrm{~K} \mathrm{~mol}^{-1}$, freezing point of water $=0^{\circ} \mathrm{C}$ ]

Which of the following solutions exhibits highest freezing point depression?

Calculate the concentration of dissolved gas in water at $25^{\circ} \mathrm{C}$ if partial pressure of gas at same temperature is 0.15 atm .

$$ \left[\mathrm{K}_{\mathrm{H}}=0.15 \mathrm{~mol} \mathrm{dm}^{-3} \mathrm{~atm}^{-1}\right] $$

Calculate the osmotic pressure of 0.03 mole of non electrolyte solute dissolved in $0.1 \mathrm{dm}^3$ of water at $300 \mathrm{~K} .\left[\mathrm{R}=0.082 \mathrm{dm}^3 \mathrm{~atm} \mathrm{~mol}^{-1} \mathrm{~K}^{-1}\right]$