Cryolite is the chief ore of
  • Aluminium correct
  • Zinc
  • Iron
  • Copper
Composition of Siderite is
  • Fe3O4
  • FeCO3
  • Fe2O3
  • FeS2
Calamine is the ore of
  • Aluminium
  • Iron
  • Copper
  • Zinc
Malachite is an ore of:
  • Copper
  • Magnesium
  • Calcium
  • Both magnesium and calcium
When a metal is to be extracted from its ore and if the gangue associated with the ore is silica ,then
  • Both acidic and basic fluxes are used
  • Neither of them is needed.
  • An acidic flux is used
  • A basic flux is used
Roasting is done generally in case of the
  • Silicate ores
  • Sulphide ores
  • Oxide ores
  • Carbonate ores
The metal always found in free state is
  • Sodium
  • Copper
  • Gold
  • Silver
Bauxite is the chief ore of:
  • Iron
  • Zinc
  • Copper
  • Aluminium
Dolomite is a mineral of
  • Aluminium
  • Magnesium
  • Calcium
  • Both magnesium and Calcium
Pyrolusite is a/an
  • Not an ore
  • Oxide ore
  • Sulphide ore
  • Carbide ore
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