Identify M and N in the following reaction.
Copper glance `overset("controlled heating")(rarr) M + SO_2 uarr`
`M overset(N)(rarr)Cu + SO_2 uarr`

Options

A. `M = Cu_2O, N`=Self reduction
B. `M=Cu_2O + Cu_2S `, N=self reduction
C. `M = Cu_2O, N`=carbon reduction
D. `M = Cu_2O, N` =Electrolytic reduction

Answer

B

Explanation

In the first reaction, partial roasting of `Cu_2S` takes place, M will be `(Cu_2O+Cu_2S)`. This mixture on heating (N) only undergoes self reduction. Sel freduction is the process, not a condition of the reaction.