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Why walls give shiny appearance after 2 or3 days |
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Answer» In whitewash Calcium hydroxide is present.Calcium hydroxide reacts slowly with the carbon dioxide in air to form a thin layer of calcium carbonate on the walls. Calcium carbonate is formed after two to three days of white washing and gives a shiny finish to the walls. Cao combines with co2 to give caco3 i.e. clcium carbonate |
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