A colourless solid (X) on heating evolved CO_2and also gave a white re – InterviewSolution

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1.	A colourless solid (X) on heating evolved CO_2and also gave a white residue, soluble in water. Residue also gave CO_2when treated with dilute acid, X is
Answer» `Na_2CO_3` `CaCO_3` `NaHCO_3` `CA(HCO_3)_2` SOLUTION :

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