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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

`CaCO_3`

B

`Na_2CO_3`

C

`Ca(NO_3)_2`

D

`K_2CO_3`

Text Solution

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The correct Answer is:
A
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