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Which of the following gases is most soluble in water?

Practice Questions

Q1
Which of the following gases is most soluble in water?
  1. O2
  2. N2
  3. CO2
  4. H2

Questions & Step-by-Step Solutions

Which of the following gases is most soluble in water?
Correct Answer: CO2
  • Step 1: Understand that solubility means how well a gas can dissolve in water.
  • Step 2: Look at the gases given: CO2 (carbon dioxide), O2 (oxygen), N2 (nitrogen), and H2 (hydrogen).
  • Step 3: Know that CO2 can react with water to form carbonic acid, which helps it dissolve better.
  • Step 4: Compare CO2 with the other gases: O2, N2, and H2 do not form any compounds with water.
  • Step 5: Conclude that since CO2 can form carbonic acid, it is more soluble in water than O2, N2, and H2.
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