Q.

CaOH2  →excessCO2A.   Correct statement about ‘A’ is

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a

It is responsible for temporary hardness of water

b

It is insoluble in water

c

On strong heating ‘A’ forms a metal carbonate

d

All are correct

answer is A.

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Detailed Solution

'A' is Ca(HCO3)2It is soluble in water, responsible for temporary hardness of water.Ca(HCO3)2→Δ CaCO3+H2O+CO2CaCO3 →Δ  CaO +CO2Ca(HCO3)2 →Strong ∆ CaO+H2O+2CO2
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CaOH2  →excessCO2A.   Correct statement about ‘A’ is