If $N_2$ gas is bubbled through water at 293 K , how many moles of $N_2$ gas would dissolve in 1 litre of water? Assume that $\mathrm{N}_2$ exerts a partial pressure of 0.987 bar.

[Given $\mathrm{K}_{\mathrm{H}}$ for $\mathrm{N}_2$ at 293 K is 76.48 K bar ]

Vapour pressure of a solution containing 18 g of glucose and 178.2 g of water at $100^{\circ} \mathrm{C}$ is (Vapour pressure of pure water at $100^{\circ} \mathrm{C}=760$ torr)

A mixture of phenol and aniline shows negative deviation from Raoult's law. This is due to the formation of

Which one of the following pairs will show positive deviation from Raoult's law?