Answer: c. potassium nitrate
Among the given substances the solubility of carbon dioxide in liquids is more when compared with potassium nitrate, sugar and sodium chloride.
Step-by-step explanation:
Increasing pressure doesn’t change the amount of solid or liquid particles dissolved in a solution. Thus pressure doesn’t have an effect on the solubility of solids and liquids. But the case of gases is different.
Increasing pressure above a liquid causes more gas molecules to get dissolved in the liquid. Thus pressure of the system directly affects the solubility of gases in a liquid.
In this question sugar, potassium nitrate and sodium chloride re solids and the pressure cannot change the solubility of these in a liquid.
But carbon dioxide being a gas can be dissolved more in a liquid if the pressure is increased.