Ellingham diagram represents change of
  • ΔG with temperature
  • ΔH with temperature
  • ΔG with pressure
  • (ΔG – TΔS) with temperature
During the extraction of haematite, limestone is added which acts as
  • flux
  • slag
  • reducing agent
  • gangue
In blast furnace iron oxide is reduced by
  • silica
  • carbon monoxide
  • carbon
  • lime stone
From the Ellingham graph between Gibb’s energy and temperature, out of C and CO with is a better reducing agent for ZnO?
  • Carbon
  • CO
  • Both of these
  • None of these
In a thermite process is used as reducing agent.
  • Zn
  • Al
  • Mn
  • Fe
Blister copper is
  • impure copper
  • obtained in self reduction process during bessermerisation
  • Both are correct
  • None is correct
Which of the following slags is produced during extraction of iron?
  • CaSiO
  • FeSiO
  • MgSiO
  • ZnSiO
Which of the following oxides cannot be reduced by hydrogen?
  • Ferric oxide
  • Aluminium oxide
  • Zinc oxide
  • Cupric oxide
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