Question

Upon treatment with ammonical `H_(2)S`, the metal ion that precipitates as a sulfide is
A. Fe(III)
B. Al(III)
C. Mg(II)
D. Zn(II)

Answer 1

Correct Answer - D
Ammonical `H_(2)S` is group reagent of fourth group cationic radicals. `Fe^(3+)&Al^(3+)` will precipitate `Fe(OH)_(3)` and `Al(OH)_(3)` respectively.only zinc will form white precipitate of ZnS.