Which of the following is not an ore of magnesium?
Magnesite
Dolomite
Gypsum
Carnallite
C.
Gypsum
Gypsum or CaSO4.2H2O is an ore of calcium.
Dolomite or CaCO3.MgCO3; Magnesite or MgCO3 and Carnallite or KCl.MgCl2.6H2O are the ores of magnesium.
In Mc Arthur forest method, silver is extracted from the solution of Na[Ag(CN)2] by the use of:
Fe
Mg
Cu
Zn
Gravity separation process is used for the concentration of:
calamine
haematite
chalcopyrite
bauxite
