Question

Which of the following gas (es) do not dissolve in water?
This question has multiple answers
A) Carbon dioxide
B) Oxygen
C) Helium
D) Nitrogen

Answer 1

Hint: We must know that the solubility is the property of a solid, liquid or gaseous chemical substance called solute to dissolve in a solid, liquid or gaseous solvent. The dissolving of a gas in water depends on the interaction between the molecules of the gas and the water molecules. The amount of gas that can be dissolved in water depends on the temperature of the water. More gas can dissolve in cold water than in hot water.

Complete answer:
We need to know that some pure gases dissolve in water at significant amounts, so we can consider them as water-soluble gases. Examples of water-soluble gases are: Carbon dioxide, ammonia, chlorine, sulfur dioxide, and hydrogen sulfide. But, some pure gases only dissolve in water at trace amounts, we can consider these gases as water-insoluble.
Examples of water insoluble gases- Hydrogen, nitrogen, helium, and methane. The solubility values of pure gases in water dramatically depend on the temperature (and pressure). We will look at all the options one by one:
Option A) this is a correct option as carbon dioxide is a water soluble gas as discussed above.
Option B) This option is incorrect as oxygen is not soluble in water.
Option C) this option is incorrect as helium is insoluble in water.
Option D) this option is incorrect as nitrogen is not soluble in water.

Option A is the correct answer.

Note:
We must have to know that the hydrogen gas being non-polar does not dissolve in water. When we move a bottle of soda out of the fridge, lots of bubbles are formed and gas escapes out of the bottle, because the solubility of $$C{O}_2$$ in water drops to about half as a result of changing the conditions from refrigerator to ambient temperature.