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JEE Advanced2011ChemistryGeneral Principles and Processes of Isolation of MetalsActual

Extraction of metal from the ore cassiterite involves

Options

  1. Acarbon reduction of an oxide ore
  2. Bself-reduction of a sulphide ore
  3. Cremoval of copper impurity
  4. Dremoval of iron impurity

Correct answer

A. carbon reduction of an oxide ore

Step-by-step solution

The important ore of tin is cassiterite ( SnO ₂ ) . Tin is extracted from cassiterite ore by carbon reduction method in a blast furnace. SnO ₂+2 C Sn +2 CO The product often contain traces of iron which is removed by blowing air through the melt to oxidise to FeO which then floats to the surface. 2 Fe + O ₂ 2 FeO

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