`Cr_(2)O_(5)^(-2)rarr CrO_(4)^(-2)` In the above reaction the change in oxidation number is

K_(2)Cr_(2)O_(7)+NaoH to CrO_(4)^(2-)

In alkaline H_(2)O_(2),Cr_(2)O_(7)^(2-) changes to tetraperoxo species… having oxidation number of Cr as …

MnO_(4)^(-) is good oxidising agent in different medium changing to - rarr MnO_(4)^(2-) rarr MnO_(4)^(2-) rarr MnO_(2) rarr Mn_(2)O_(3) Changes in oxidation number respectively are -

4K_(2) Cr_(2) O_(7) overset(heat)rarr 4K_(2) CrO_(4) + 3O_(2) + X . In the above reaction X is

Can the reaction, Cr_(2)O_(7)^(2-) + H_(2)O rarr 2CrO_(4)^(2-) + 2H^(+) be regarded as a redox reaction ?