The freezing point of equimolal aqueous solution will be highest for

Calculate the quantity of $\mathrm{CO}_2$ required to prepare 1 L of soda water when the soda water was packed under 2 atm of $\mathrm{CO}_2$.

[Henry's law constant for $\mathrm{CO}_2$ is $1.67 \times 10^8 \mathrm{~Pa}$ ]

Which of the following substances show the highest colligative properties?

The Henry's law constant for the solubility of $\mathrm{N}_2$ gas in Water at 298 K is $1 \times 10^5 \mathrm{~atm}$. The mole fraction of air is 0.8 . The number of moles of $\mathrm{N}_2$ from air dissolved in 10 moles of water at 298 K and 5 atm pressure is