Extraction of Metals - Result Question 53

####53. In self-reduction, the reducing species is

(a) $S$

(b) $O^{2-}$

(c) $S^{2-}$

(d) $SO _2$

Match the Columns

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Solution:

  1. $Cu _2 S+2 Cu _2 O \longrightarrow 6 Cu+SO _2$

In $Cu _2 S$, sulphur is $S^{2-}$ and in $SO _2$, sulphur is in +4 state.

Hence, $S^{2-}$ is acting as reducing agent.



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