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Q.

When CO2 is passed into Ca(OH)2 a white precipitate is formed due to the formation of

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a

CaC2

b

Ca(HCO3)2

c

CaCO3

d

None

answer is A.

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Detailed Solution

Ca(OH)2+CO2CaCO3+H2O

The white precipitate formed when carbon dioxide gas is passed into calcium hydroxide (lime water) is the calcium carbonate which turns lime water milky.

Hence, the white precipitate is CaCO3.

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