Q10 / 69 · JEE Advanced 2011 (Paper 1) · Chemistry

Extraction of metal from the ore cassiterite involves

  • Correct answer
    A
    carbon reduction of an oxide ore
  • B
    self-reduction of a sulphide ore
  • C
    removal of copper impurity
  • Correct answer
    D
    removal of iron impurity

Solution

The important ore of tin is cassiterite $\left(\mathrm{SnO}_2\right)$. Tin is extracted from cassiterite ore by carbon reduction method in a blast furnace. $\mathrm{SnO}_2+2 \mathrm{C} \rightarrow \mathrm{Sn}+2 \mathrm{CO}$ The product often contain traces of iron which is removed by blowing air through the melt to oxidise to $\mathrm{FeO}$ which then floats to the surface. $2 \mathrm{Fe}+\mathrm{O}_2 \rightarrow 2 \mathrm{FeO}$

Hence, the correct answer is options: 'A', 'D'.

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