Saved Bookmarks
| 1. |
The most important copper oxide containing minerals are azurite `{Cu_(3)(OH)_(2)(CO_(3))_(2)}`, malachite `{Cu_(2)(OH)_(2)(CO_(3))}`, cuprite `(Cu_(2)O)`, tenorite `(CuO)`. Extraction of copper from these low grade ores involves leaching followed by reduction `"Azurite" overset(H_(2)SO_(4)(aq))rarrunderset((A))("solution") overset(KCN)rarrpptooverset(KCN)underset((excess))rarrunderset((B))("solution ")` Select the INCORRECT statement:A. Solution (A) contains coloured speciesB. Solution (B) contains paramgnetic speciesC. Solution (B) contains colcurless speciesD. Solution (B) contains c0-ordination species |
|
Answer» Correct Answer - B `Cu_(2)(OH)_(2)(CO_(3))+2H_(2)SO_(4)rarr2underset((A))(CuSO_(4))+CO_(2)+H_(2)O` `CuSO_(4)+2KCNrarrK_(2)SO_(4)+Cu underset((yellow))((CN)_(2))darr` `Cu(CN)_(2)rarrCuCNdarr+(CN)_(2)uarr` `CuCN+.^(-)CNrarr[Cu underset((B))((CN)_(4))]^(3-)` |
|