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Copper is extracted from copper pyrites,...

Copper is extracted from copper pyrites, `CuFeS_2`.What is matte? How is it formed?

A

iron has less affinity for oxygen than sulphur at high temperature

B

sulphur has less affinity for oxygen at high temperature

C

copper has more affinity for oxygen than sulphur at high temperature

D

copper has less affinity for oxygen than sulphur at high temperature

Text Solution

Verified by Experts

The correct Answer is:
D
When copper pyrites is heated in a bessemer converter in presence of a blast of oxygen. It is initially converted into a mixture of `Cu_2S FeS and SO_2`.
`2CuFeS_2 + O_2 rarr Cu_2S + 2FeS + SO_2`
Since `Cu_2` of is not formed initially even in presence of `O_2` therefore , copper has less affinity for oxygen than sulphur at higher temperature.
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