What does carbon dioxide do to lime water?
Answer and explanation
Correct answer: Milky
Carbon dioxide is identified by passing it through lime water, which is an aqueous solution of calcium hydroxide. The reaction is CO₂ + Ca(OH)₂ → CaCO₃ + H₂O. The calcium carbonate produced is insoluble and forms a fine suspension, making the solution appear milky. Therefore, option A is correct; the other colours are not the characteristic result of this test.
Frequently asked questions
What is the correct answer to this question?
Milky
Why is this the correct answer?
Carbon dioxide is identified by passing it through lime water, which is an aqueous solution of calcium hydroxide. The reaction is CO₂ + Ca(OH)₂ → CaCO₃ + H₂O. The calcium carbonate produced is insoluble and forms a fine suspension, making the solution appear milky. Therefore, option A is correct; the other colours are not the characteristic result of this test.
Which subject and chapter does this question cover?
This is a Class 10 Science question. Chapter: Chemical Substances – Nature and Behaviour. Topic: Acids, Bases, and Salts.
