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When water is added to X (calcium containing), solution of Y is formed. When CO2 is passed through it turns the solution milky due to formation of Z. If excess CO2 is passed into the solution, milkiness disappears due to formation of W. The compound W is:

Option: 1

CaO


Option: 2

Ca(OH) 2

 


Option: 3

CaCO3


Option: 4

Ca(HCO3)2


Answers (1)

\\CaO+H_{2}O\rightarrow Ca(OH){_2}\\ CaO+CO{_2}\rightarrow CaCO{_3}

CaCO_3+H_2O+CO_2\rightarrow Ca(HCO_3)_2

In excess of CO_2

CaCO_3+H_2O+CO_2\rightarrow Ca(HCO_3)_2\\

Therefore, option(4) is correct.

 

Posted by

Sumit Saini

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