In the detection of carbon, lime water turns milky due to the formation of:
A
CaO
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B
Ca(OH)2
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C
CaCO3
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D
Ca(HCO3)2
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Solution
The correct option is CCaCO3 Carbon dioxide passes through limewater, giving a milky solution. This is due to the insoluble suspension of calium carbonate formed: Ca(OH)2(aq)+CO2(g)→CaCO3(s)+H2O(l)