JEE Advanced 2011 Chemistry question

Chemistry General Principles and Processes of Isolation of Elements (Metallurgy)JEE Advanced 2011

Extraction of metal from the ore cassiterite involves

(A)carbon reduction of an oxide oreCorrect
(B)self-reduction of a sulphide ore
(C)removal of copper impurity
(D)removal of iron impurityCorrect

Answer: (A),(D)

Solution

Cassiterite (tinstone) is , an oxide ore. It is concentrated by gravity separation, and the main impurity wolframite, (with ), which contains iron, is removed by magnetic separation; so removal of iron impurity (D) is involved. The concentrated oxide is then reduced

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Question ID VK-025882