a. When the gas formed on heating limstone is passed through freshly prepared lime water, the lime water turns milky?
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Answer: carbon dioxide
Lime water is made up of Calcium hydroxide. When carbon dioxide is passed through lime water, the Carbon dioxide reacts with calcium hydroxide to form Calcium carbonate which is a white precipitate, then lime water turns milky as there is formation of calcium carbonate...
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Lime water turns milky as there is formation of calcium carbonate.
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