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 S + 3/2O₂ → Cu₂O + SO₂ ;CuO + C → Cu + CO

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

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

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

Answer 1

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

Self reduction process

Cu₂ S + 3/2 O₂ → Cu₂O + SO₂

2Cu₂O + Cu₂ S → 6Cu + SO₂