A white precipitate is obtained when

Options

A. a solution of `BaCl_(2)` in treated with `Na_(2)SO_(3)`
B. a solution of `NaAlO_(2)` is heated with `NH_(4)CI`
C. `H_(2)S` is passed through a solution of `ZnSO_(4)`
D. a solution of `ZnSO_(4)` is treated with `Na_(2)CO_(3)`

Answer

A, B, C, D

Explanation

a) `Na_(2)SO_(3)+BaCl_(2) to underset("white")(BaSO_(3)) darr +2NaCl`
b) `Na[Al(OH)_(4)]+NH_(4)Cl to underset("white")(Al(OH)_(3))darr+H_(2)O+NaCl+NH_(3) uarr`
c) `ZnSO_(4)+H_(2)S to H_(2)Scu+ZnS` (greenich white)
d) `ZnSO_(4)+Na_(2)CO_(3) to Na_(2)SO_(4)+ZnCO_(3)` (white)