Question
Chemistry Question on General Principles and Processes of Isolation of Elements
Which type of copper is formed by the following reactions?
2Cu2S + 3O2 →6Cu + SO2
A
Blister copper
B
Copper crisp
C
Reduced copper
D
Copper slag
Answer
Blister copper
Explanation
Solution
The correct answer is option (A) : Blister copper
In the reaction, the oxidation number of copper decreases from +1 in Cu2O or Cu2S to 0in copper metal. Therefore, copper is reduced and it is oxidizing agent or oxidant.Further the oxidation number of S increases from -2 in Cu2S to +4 in SO2 , therefore sulfur is oxidised.