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Identify the oxidising and reducing agent in the following reaction . Also write the change in oxidation number.

Cr(OH)3 + Br2 CrO4 2- + Br-

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As O.N. of Cr changes from +3 to +6 so it acts as reducing agent . 

On the other hand O.N. of Br changes from 0 to -1 so it acts oxidising agent.

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