Which among the following salts shows a decrease in solubility with an increase in temperature?

Calculate the concentration of dissolved gas in water at $25^{\circ} C$ if the partial pressure of the gas at the same temperature is $0.15 \ atm$. $\left[K_H = 0.15 \ mol \ dm^{-3} \ atm^{-1}\right]$ (in $M$)

Identify the reason for the solubility of polar solute in polar solvent from the following.

If $N_2$ gas is bubbled through water at $293 \ K$,how many millimoles of $N_2$ gas would dissolve in $1 \ L$ of water? Assume that $N_2$ exerts a partial pressure of $0.987 \ bar$. Given that Henry's law constant for $N_2$ at $293 \ K$ is $76.48 \ kbar$.

Calculate $K_H$ when $2 \ mmol$ of $O_2$ dissolve in $540 \ mL$ of water at $27 \ ^oC$ temperature. Given $P_{O_2} = 2 \times 10^{-8} \ bar$.

Choose the correct statement.