A solid compound 'X' on heating gives CO 2 gas and a residu…

Chemistry S and P - Block Elements (S - Block Elements Not In Syllabus ) Alkaline Earth Metals Single Correct MCQ

Published on: August 13, 2026

A solid compound 'X' on heating gives CO 2 gas and a residue. The residue mixed with water forms 'Y'.

On passing an excess of CO 2 through 'Y' in water a clear solution 'Z' is obtained. On boiling 'Z' compound 'X' is reformed. The compound 'X' is

Ca(HCO 3 ) 2

CaCO 3

Na 2 CO 3

K 2 CO 3

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