When an excess of CO2 is passed through lime water then what will be the sequence of the product?

a. Ca(HCO3)2,CaO

b. CaO,Ca(HCO3)2

c. CaCO3,Ca(HCO3)2

d. Ca(HCO3)2,CaO

Solution:

Answer: (c)

Ca(OH)2 (aq) + CO2(g) → CaCO3(s) + H2O(l)

CaCO3(s) + H2O(l) + CO2(g) → Ca(HCO3)2(aq)

Hence, the correct option is c).

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