Multiple choice general knowledge science & technology

When carbon dioxide is passed through lime water it turns

  1. light blue

  2. milky

  3. watery

  4. dark green
Reveal answer Fill a bubble to check yourself
B Correct answer
Explanation

When carbon dioxide is passed through lime water (calcium hydroxide solution), it reacts to form calcium carbonate, which is insoluble and makes the solution appear milky or cloudy. This is a classic test for the presence of CO2 gas. The solution doesn't turn blue, watery, or green.

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