Question

Formation of metallic copper from the sulphide ore in the commercial thermo-metallurgical process essentially involves which one of the following reaction :

(A) Cu2 * + 3/2O2 → Cu2O + SO2 ;CuO + C → Cu + CO

(B) Cu2 + 3/2O2 → Cu2O + SO2 ;2Cu2O + Cu2 → 6Cu + SO2

(C) Cu2 + 2O2 → CuSO4 ;CuSO4 + Cu2 → 3Cu + 2SO2

(D) Cu2 * + 3/2O2 → Cu2O + SO2 ;Cu2O + CO → 2Cu + CO2

Answer 1

Correct Answer is: (C) Cu2 + 2O2 → CuSO4 ;CuSO4 + Cu2 → 3Cu + 2SO2

Self reduction process

Cu2 * + 3/2 O2 → Cu2O + SO2

2Cu2O + Cu2 * → 6Cu + SO2