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A compound X on heating gives a colourle...

A compound X on heating gives a colourless gas. This 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 give back X. the X is

A

`NaHCO_(3)`m

B

`Na_(2) CO_(3)`

C

`Ca(HCO_(3))_(2)`

D

`CaCO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
`underset((X))(CaCO_(3))overset("Heat")to underset ("Residue Colourless gas")(CaO +CO_(2) uarr)`
`underset("Radiue")(CaO)+H_(2)O to underset((Y))(Ca(OH)_(2))`
`underset((Y))(Ca(OH)_(2))+ underset("Excess")(2CO_(2)) to underset((Z))(Ca(HCO_(3))_(2))`
`underset((Z))(Ca(HCO_(3))_(2)) overset("Heat")to underset((X))(CaCO_(3))9+CO_(2) +H_(2)O`
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