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When carbon dioxide gas is passed through lime water,


Options:
A .   calcium hydroxide is formed.
B .   white precipitate of CaO is formed.
C .   white precipitate of CaCO3 is formed.
D .   colour of lime water disappears.
Answer: Option C
:
C
When CO2 is passed through lime water, a white precipitate of CaCO3 is formed, which turns lime water milky. The reaction occurs as follows:
Ca(OH)2(aq)+CO2(g)CaCO3(s)+H2O(l)

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