Copper is extracted by hydrometallurgy from low grade ores. Which of the following reaction is/are involvedgt

Options

A. `Cu^(2+)(aq)+H_(2)(g) to Cu(s)+2H^(+)(aq)`
B. `Cu^(2+)(aq)+Fe(s) to Cu(s)+Fe^(2+)(aq)`
C. `Cu_(2)S+2Cu_(2)O overset(Delta)to 6Cu+SO_(2)`
D. Both a and b

Answer

D