For how many of the following ores calcinations is done during extraction of metals?___ (a) Haematite (b) Calamine (c) dolomite (d) bauxite (e) zinc blende
An ore of manganese metal is: (a) bauxite (b) haematite (c) cuprite (d) pyrolusite
The major ore fo aluminium is known as: (a) cinnabar (b) calamine (c) bauxite (d) pyrolusite
Which metal can be extracted from each one of the following ores:
(a) bauxite (b) calamine (c) haematite.