A mineral is called ore: From which metal can be extracted From which metal cannot be extracted From which metal can be extracted profitably in which a presious metal is present
Method of concentration of haematite is Froth floatation Gravity separation Magnetic separation None of the above
Argentite ore consists of Silver Gold Copper Platinum
Important source of iron is : Magnetite Bauxite Ironpyrites magnite
the process of extracting the metal from its ore is called: Concentration Leaching Metallurgy Refining
Which of the following mineral contains calcium and magnesium both : Dolomite Limestone Megnesite Calcite
for which one of the metal froth floatation process is used to concentrate: Bauxite Cinnabar Haematite Horn silver
Froth floatation process is based upon: Magnetic properties of ore Electric properties of ore Tendency to wetting of the ore particles Relative density of ore
Heating pyrites in presence of air for the removal of sulphur is called: Amalgamation Calcination Rasting Smelting
Which one of the following metals will not form an amalgam: Au Ag Fe Zn