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JEE Advanced 2011Paper 1

Exam: JEE Advanced
Year: 2011
Paper: Paper 1
Subject: Chemistry
Chapter: General Principles and Processes of Isolation of Metals

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

Extraction of metal from the ore cassiterite involves

Extraction of metal from the ore cassiterite involves

Options

Acarbon reduction of an oxide ore
Bself-reduction of a sulphide ore
Cremoval of copper impurity
Dremoval of iron impurity

Correct answer

A. carbon reduction of an oxide ore

Step-by-step 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}

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