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When a equimolar mixture of Cu(2)S and C...

When a equimolar mixture of `Cu_(2)`S and CuS is tirated with `Ba(MnO_(4))_(2)` in acidic medium, the final products cintain `Cu^(2+)`, `So_(2)` and `Mn^(2+)`. If the mol. Mass of `Cu_(2)`S, `CuS` and `Ba(MnO_(4))_(2)`are `M_(1)`, `M_(2)` and `M_(3)` respectively then :

A

7,7

B

6,6

C

6,8

D

8,6

Text Solution

Verified by Experts

The correct Answer is:
D
(i). `{:(Cu_(2)^(1+)to3Cu^(2+)+2e^(-)),(S^(2-)toSO_(2)+6e^(-)(n=6)]):}(n=8)`
(ii). `Cu^(2+)` does not change only `S^(2-)` changes to `SO_(2)` hence `n=6`.
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