Q13 / 180 · KCET 2015 · Chemistry
Copper is extracted from Copper pyrites by heating in a Bessemer converter. The method is
based on the principle that
based on the principle that
- Correct answerACopper has more affinity for oxygen than Sulphur at high temperature.
- BIron has less affinity for oxygen than Sulphur at high temperature.
- CCopper has less affinity for oxygen than Sulphur at high temperature.
- DSulphur has less affinity for oxygen at high temperature.
Solution
The reactions involved in the extraction of copper from coper pyrites is
\[ \begin{array}{l} 2 \mathrm{Cu}_{2} \mathrm{~S}+3 \mathrm{O}_{2} \rightarrow 2 \mathrm{Cu}_{2} \mathrm{O}+2 \mathrm{SO}_{2} \\ \mathrm{Cu}_{2} \mathrm{~S}+2 \mathrm{Cu}_{2} \mathrm{O} \rightarrow 6 \mathrm{Cu}+\mathrm{SO}_{2} \end{array} \]
Therefore, Cu has more affinity for oxygen than sulphur.
\[ \begin{array}{l} 2 \mathrm{Cu}_{2} \mathrm{~S}+3 \mathrm{O}_{2} \rightarrow 2 \mathrm{Cu}_{2} \mathrm{O}+2 \mathrm{SO}_{2} \\ \mathrm{Cu}_{2} \mathrm{~S}+2 \mathrm{Cu}_{2} \mathrm{O} \rightarrow 6 \mathrm{Cu}+\mathrm{SO}_{2} \end{array} \]
Therefore, Cu has more affinity for oxygen than sulphur.
Hence, the correct answer is option: 'A'.