A solid compound X on heating gives CO2 gas and a residue. The residue mixed with water forms Y. On passing an excess of CO2 through Y in water, a clear solution Z is obtained. On boiling Z, compound X is reformed. The compound X is

Question

A solid compound X on heating gives CO2 gas and a residue. The residue mixed with water forms Y. On passing an excess of CO2 through Y in water, a clear solution Z is obtained. On boiling Z, compound X is reformed. The compound X is (A) Ca(HCO3)2 (B) CaCO3 (C) Na2CO3 (D) K2CO3

Tardigrade Admin · Accepted Answer

Compound X is CaCO3 CaCO3X xrightarrowΔ CaOResidue + CO2 uparrow CaOResidue+H2O longrightarrow Ca(OH2) Ca(OH)2 Y+ CO2Excess+H2O longrightarrow Ca(HCO3)2Z Ca(HCO3)2Z xrightarrowΔ CaCO3X+H2O+CO2 uparrow

Q. A solid compound $X$ on heating gives $C O_{2}$ gas and a residue. The residue mixed with water forms $Y$ . On passing an excess of $C O_{2}$ through $Y$ in water, a clear solution $Z$ is obtained. On boiling $Z$ , compound $X$ is reformed. The compound $X$ is

$C a (H C O_{3})_{2}$

$C a C O_{3}$

$N a_{2} C O_{3}$

$K_{2} C O_{3}$

Q. A solid compound X on heating gives CO2​ gas and a residue. The residue mixed with water forms Y. On passing an excess of CO2​ through Y in water, a clear solution Z is obtained. On boiling Z, compound X is reformed. The compound X is

Ca(HCO3​)2​

CaCO3​

Na2​CO3​

K2​CO3​

Compound X is CaCO3​ XCaCO3​​Δ​ResidueCaO​+CO2​↑ ResidueCaO​+H2​O⟶Ca(OH2​) YCa(OH)2​​+ExcessCO2​​+H2​O⟶ZCa(HCO3​)2​​ ZCa(HCO3​)2​​Δ​XCaCO3​​+H2​O+CO2​↑

Q. A solid compound $X$ on heating gives $C O_{2}$ gas and a residue. The residue mixed with water forms $Y$ . On passing an excess of $C O_{2}$ through $Y$ in water, a clear solution $Z$ is obtained. On boiling $Z$ , compound $X$ is reformed. The compound $X$ is

$C a (H C O_{3})_{2}$

$C a C O_{3}$

$N a_{2} C O_{3}$

$K_{2} C O_{3}$