Chemicals compound 'A' is used to remove temporary hardness from water – InterviewSolution

1.	Chemicals compound 'A' is used to remove temporary hardness from water. It reacts with Na_2 CO_3 to generate caustic soda. When CO_2 is bubbled through 'A'. It turns cloudy. What is the chemical formula of 'A' ?
Answer» `CaCO_3` CAO `CA(OH)_2` `Ca(HCO_3)_2` ANSWER :D

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