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

Identify from the following salts the one whose solubility in water decreases with an increase in temperature.

Assertion : Iodine is more soluble in water than in carbon tetrachloride.
Reason : Iodine is a polar compound.

The solution of sugar in water contains

The variation of solubility of four different gases $(G_1, G_2, G_3, G_4)$ in a given solvent with pressure at a constant temperature is shown in the plot. The gas with the highest value of Henry's law constant is

The oxygen dissolved in water exerts a partial pressure of $20 \ kPa$ in the vapour above water. The molar solubility of oxygen in water is ............ $\times 10^{-5} \ mol \ dm^{-3}$ (Round off to the Nearest Integer). [Given: Henry's law constant $K_H = 8.0 \times 10^{4} \ kPa$ for $O_2$,Density of water $= 1.0 \ kg \ dm^{-3}$]