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Question

What is redox reaction? Give one example.


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Solution

A chemical reaction in which the oxidation number of a participating chemical species varies is called a redox reaction. In this type of chemical reaction oxidation and reduction takes place simultaneously. Oxidation is the loss of electrons and reduction is the gain of electrons.

Example:

The reaction between Zinc and Copper. This is a type of redox reaction in which Copper metal is obtained when Zinc reduces the Cu2+ ion in the Copper sulfate solution.

Zn (s) + CuSO4 (aq) → ZnSO4 (aq) + Cu (s)

Zinc Copper sulphate Zinc sulphate Copper

Here Zn gets oxidised and acts as a reducing agent and CuSO4 gets reduced and acts as an oxidizing agent.


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