Water-containing salt X, of a divalent metal, when treated with a compound Y gives much lather with soap. Further, an insoluble compound `MgCO_(3)` and salt of a monovalent metal sulphate are formed. Identify X and Y, respectively.

Options

A. `CaCl_(2), Na_(2)CO_(3)`
B. `MgSO_(4), Na_(2)CO_(3)`
C. `MgCl_(2), NaHCO_(3)`
D. `CaSO_(4), Mg(HCO_(3))_(2)`

Answer

B

Explanation

Divalent metal salt X that is, `MgSO_(4)` is treated with compound Y that is `Na_(2)CO_(3)` to form `MgCO_(3)` and `Na_(2)SO_(4)`.
`MgSO_(4) + Na_(2)CO_(3) rarrMgCO_(3) + Na_(2)SO_(4)`.