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

Chemistry · NEET · NTA Exams — The s-Block Elements

A solid compound 'X' on heating gives CO2 gas and a residue.  The residue mixed with water forms compound' Y' which on passing an excess of CO2  in water, a clear solution, 'Z' is obtained.  On boiling 'Z', compound ' X' is reformed.  The compound 'X' is:
  1. Ca(HCO3)2
  2. CaCO3
  3. NaCO3
  4. K2CO3

Answer

(B) CaCO 3

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