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

Which of the following gases is least soluble in water at the same temperature and pressure?

Air is a mixture of a number of gases. The major components are oxygen and nitrogen with approximate proportions of $20\%$ and $79\%$ by volume at $298\ K$. The water is in equilibrium with air at a pressure of $10\ atm$. At $298\ K$,if the Henry's law constants for oxygen and nitrogen are $3.30 \times 10^7\ mm$ and $6.51 \times 10^7\ mm$,respectively,the mole ratio of gases $(O_2 : N_2)$ dissolved in water is about

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

Explain the equilibrium in soda water and explain it using Henry's law.

Which of the following gases is least soluble in water under the same conditions of temperature and pressure?