IIT-JEE 2011 · Paper 1 · Chemistry Q8

ChemistryMultiple correct+4Question 8 of 69

Extraction of metal from the ore cassiterite involves

carbon reduction of an oxide ore

self-reduction of a sulphide ore

removal of copper impurity

removal of iron impurity

Answer and worked solution

Official answer: A, D

Cassiterite is SnO₂, an oxide ore, reduced by carbon: $\ce{SnO2 + 2C -> Sn + 2CO}$ .

Impurity. It contains wolframite (FeWO₄/MnWO₄), which is magnetic and is removed by magnetic separation: removal of iron impurity.

(A), (D)

Topics:Extraction of specific metals

IIT-JEE 2011 · Paper 1, Chemistry question 8