1. Tardigrade
  2. Question
  3. Chemistry
  4. Assertion: In the reaction, 2Cu2O(s)+Cu2S(s) arrow 6 Cu(s)+SO2(g) copper acts as a reductant and sulphur acts as an oxidant. Reason: The given reaction is not a redox reaction.

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Q. Assertion: In the reaction, $2Cu_{2}O_{\left(s\right)}+Cu_{2}S_{\left(s\right)} \rightarrow 6 Cu_{\left(s\right)}+SO_{2\left(g\right)}$ copper acts as a reductant and sulphur acts as an oxidant.
Reason: The given reaction is not a redox reaction.

Redox Reactions

Solution:

The oxidation states are as :
image
Copper is reduced from $+1$ state to zero. Sulphur is oxidised from $-2$ state to $+4$. $Cu_{2}O$ helps sulphur in $Cu_{2}S$ to increase its oxidation number, hence $Cu(I)$ is an oxidant and sulphur of $Cu_{2}S$ helps copper both in $Cu_{2}S$ and $Cu_{2}O$ to decrease its oxidation number, hence $S$ of $Cu_{2}S$ is a reductant. And the reaction is redox reaction.