Identify `W, X, Y and Z` respectively in the given reactions.
`CaCO_(3)overset(Delta)toW+X`
`W+H_(2)O to Y`
`Y+Z to NaOH+CaCO_(3)`

Options

A. `CaO, CO_(2), CaCO_(3), Na_(2)CO_(3)`
B. `CO_(2), Ca(OH)_(2), Ca(HCO)_(3), NaHCO_(3)`
C. `CaO, CO_(2), Ca(OH)_(2), Na_(2) CO_(3)`
D. `CO_(2), CaO, H_(2)CO_(3), Na_(2)CO_(3)`

Answer

C

Explanation

`CaCo_(3) overset(Delta)to underset((W))(CaO)+ underset((X))(CO_(2))`
`underset((W)) (CaO)+ H_(2)O to underset((Y)) ( Ca(OH)_(2))`
` underset((Y)) (Ca(OH)_(2))+ underset((Z))(Na_(2) Co_(3))to CaCO_(3)+ 2NaOH`