Question:
Which of the following reactions is an example of autoreduction?
(i) Fe3O4 + 4CO → 3Fe + 4CO2
(ii) Cu2O + C → 2Cu + CO
(iii) Cu2+ (aq) + Fe (s) → Cu (s) + Fe2+ (aq)
(iv) Cu2O + 1/2Cu2S → 3Cu + 1/2SO2
Solution:
Option (iv) is the answer.
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