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What is formed when calcium hydroxide reacts with carbon dioxide, as described in the whitewashing process?

Question
What is formed when calcium hydroxide reacts with carbon dioxide, as described in the whitewashing process?
Calcium oxide and water
Calcium carbonate and water
Calcium chloride and oxygen
Calcium sulphate and carbon
Answer
Calcium carbonate and water
Detailed Explanation
Calcium hydroxide reacts with carbon dioxide in the air to form calcium carbonate and water: Ca(OH)2 + CO2 -> CaCO3 + H2O.
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