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Gas A is bubbled through slaked lime whe...

Gas A is bubbled through slaked lime when a white precipitate is formed. On prolonged bubbling the precipitate is dissolved. On heating the resultant solution, the white precipitate appears with evolution of gas B. The gases A and B respectively are

A

`CO_(2)` and CO

B

CO and `CO_(2)`

C

CO and CO

D

`CO_(2)` and `CO_(2)`

Text Solution

Verified by Experts

The correct Answer is:
D
According to the equation,
`Ca(OH)_(2) + CO_(2) overset(Delta) to CaCO_(3) + H_(2)O`
`CaCO_(3) + H_(2)O + CO_(2) to Ca(HCO_(3))_(2)`
`Ca(HCO_(3))_(2) overset(Delta) to CaO + H_(2)O + 2CO_(2)`
Hence , the gas A and B are `CO_(2)` and `CO_(2)` respectively.
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