Q.

What are the products formed in sequence when excess of CO2 is passed in slaked lime?

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a

CaCO3,CaHCO32

b

CaO,CaCO3

c

CaO,CaHCO32

d

CaHCO32,CaCO3

answer is A.

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Detailed Solution

Carbon dioxide readily reacts with alkalies forming the carbonate and, if CO2 is in excess, the hydrogen carbonate. This is the basis of the lime-water test for CO2 gas

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