Extraction of Metals - Result Question 46
46. Extraction of metal from the ore cassiterite involves
(2011)
(a) carbon reduction of an oxide ore
(b) self-reduction of a sulphide ore
(c) removal of copper impurity
(d) removal of iron impurity
Show Answer
Answer:
Correct Answer: 46. (a, d)
Solution:
- The important ore of tin is cassiterite $\left(SnO _2\right)$. Tin is extracted from cassiterite ore by carbon reduction method in a blast furnace.
$ SnO _2+2 C \longrightarrow 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 \longrightarrow 2 FeO $
BETA
