A white solid X on heating gives a white solid Y and an acidic gas Z. Gas Z is also given out when X reacts with an acid. The compound Y is also formed if caustic soda is left open in the atmosphere. X, Y and Z are

Options

A. `{:(" "X," "Y," "Z), (NaHCO_(3), Na_(2) CO_(3), CO_(2)):}`
B. `{:(" "X," "Y," "Z), (Na_(2)CO_(3), NaOH, CO_(2)):}`
C. `{:(" "X," "Y," "Z), (Na_(2)CO_(3), NaHCO_(3), CO_(2)):}`
D. `{:(" "X," "Y," "Z), (NaOH, NaHCO_(3), CO_(2)):}`

Answer

A

Explanation

`underset(X) (2NaHCo_(3)) to underset(Y) (Na_(2)CO_(3))underset(Z)(+CO_(2)) +H_(2)O`
`underset(X) (NAHCO_(3)) + HCl to NaCl+ underset(Z)(CO_(2)) +H_(2)O`
`2NaOH+ underset("atmosphere")(CO_(2)) to underset(Y) (Na_(2) CO_(3)+ H_(2)O)`