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Chemical A is used for water softening to remove temporary hardness. A reacts with Na2CO3 to generate caustic soda. When CO2 is bubbled through A, it turns cloudly. What is the chemical formula of A

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a
CaCO3
b
CaO
c
CaOH2
d
CaHCO32

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detailed solution

Correct option is C

CaOH2+Na2CO32NaOH+CaCO3

CaOH2+CO2CaCO3+H2O

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