Among the following 0.1 m aqueous solutions, which one will exhibit the lowest boiling point elevation, assuming complete ionization of the compound in solution?

Variation of solubility with temperature t for a gas in liquid is shown by the following graphs. The correct representation is

180 g of glucose, $\mathrm{C}_6 \mathrm{H}_{12} \mathrm{O}_6$, is dissolved in 1 kg of water in a vessel. The temperature at which water boils at 1.013 bar is _________ (given, $\mathrm{K}_{\mathrm{b}}$ for water is $052 \mathrm{~K} \mathrm{~kg} \mathrm{~mol}^{-1}$. Boiling point for pure water is 373.15 K )

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 ]