A certain compound (A) imparts a golden yellow flame and exhibits following reactions:
(a). When a concentrated solution of (A) is boiled with Zn powder, hydrogen gas is evolved.
(b). When an aqueous solution of (A) is added to an aqueous solution of stannous chloride, a white precipitate is obtained, which dissolves in excess of solution (A).
Identify (A) and give equations for reactions in (a) and (b).

Options

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

Answer

A

Explanation

`Zn+ underset(X)(2NaOH) to Na_(2) ZnO_(2)+ H_(2)`
`underset(X) (2NaOH) + CO_(2) to underset(Y) (na_(2) Co_(3))+ H_(2)O`
`underset(X)(Na_(2) CO_(3))+ HCl to underset(Z)(NaHCO_(3)) + NaCl`
`underset(Y) (Na_(2) CO_(3))+ CO_(2) +H_(2)O to underset(Z) (2Na HCO_(3))`