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A solid compound 'X' on heating gives CO...

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

A

`Na_(2)CO_(3)`

B

`K_(2)CO_(3)`

C

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

D

`CaCO_(3)`

Text Solution

Verified by Experts

The correct Answer is:
D
The given compound X must be `CaCO_(3)`. It can be explained by following reactions,
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