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JEE Advanced · 2011 · 10 Apr 2011 · Paper 1 · General Principles and Processes of Isolation of Metals

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Extraction of metal from the ore cassiterite involves
  1. (A)carbon reduction of an oxide ore✓ Correct
  2. (B)self-reduction of a sulphide ore
  3. (C)removal of copper impurity
  4. (D)removal of iron impurity✓ Correct

Answer: (A), (D)

Solution

Cassiterite is (tin(IV) oxide). The extraction of tin involves:
  1. Carbon reduction:
  1. Removal of impurities: The ore cassiterite contains impurities of Fe, Mn, W, and traces of Cu. These impurities, particularly iron and copper, must be removed during the purification process.

Therefore, options (A) and (D) are correct.

JEE Advanced · 2011 · 10 Apr 2011 · Paper 1 · One or more correct options

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