The solubility of a gas in a liquid increases with:

For the solution of the gases $w$,$x$,$y$ and $z$ in water at $298 \ K$,the Henry's law constants $(K_H)$ are $0.5$,$2$,$35$ and $40 \ kbar$,respectively. The correct plot for the given data is

What is solubility? Explain the solubility of a solid solute in a liquid solvent.

Solubility of which among the following solids in water changes slightly with temperature?

Which among the following salts,solubility decreases with increase in temperature?

At $298 \ K$,the mole percentage of $N_{2(g)}$ in air is $80\%$. Water is in equilibrium with air at a pressure of $10 \ atm$. What is the mole fraction of $N_{2(g)}$ in water at $298 \ K$? ($K_H$ for $N_2$ is $6.5 \times 10^7 \ mm \ Hg$)