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  4. The number of electrons involved in the reduction of Cr2,O2-7 in acidic solution to Cr3+ is

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Q. The number of electrons involved in the reduction of $Cr_{2},O^{2-}_{7}$ in acidic solution to $Cr^{3+}$ is

Redox Reactions

Solution:

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In this reaction three electrons are required for the reduction of $Cr_{2}O^{2-}_{7}$ into $Cr^{3+}$.