The compound X on heating gives a colourless gas. The residue is disso – InterviewSolution

1.	The compound X on heating gives a colourless gas. The residue is dissolved in water to obtain Y Excess CO_2 is bubbled through aqueous solution of Y, Z is formed. Z on gentle heating gives back X. The compound X is:
Answer» `CaCO_3` `Na_2CO_3` `CaSO_4 . 2H_2O` `K_2CO_3` ANSWER :A

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