Saved Bookmarks
| 1. |
Extraction of gold and silver involves leaching with `CN^(-)`ion.silver is later recovered by:A. distillationB. zone refiningC. displacement with `Zn`D. liquation |
|
Answer» Correct Answer - C Mac arther forest process`//`cyanide process `Ag_(2)S +4NaCNoverset(O_(2))rarr2Na[Ag(CH)_(2)]+NaSO_(4)` `2Na[Ag(CN)_(2)]underset(Zn)rarrNa_(2)underset("Soluble complex")([Zn(CN)_(4)]+Ag(darr))` `Ag` extractes by displacement with `Zn` |
|