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which of the following represent redox r...

which of the following represent redox reactions?
I. `Cr_(2)O_(7)^(2-)+2overset(ө)OHrarr2CrO_(4)^(2-)+H_(2)O`
II. `Zn+CuSO_(4)rarrZnSO_(4)+Cu`
iii.`MnO_(4)^(ө)+3Mn^(2+)+4overset(ө)OHrarr5MnO_(2)+2H_(2)O`
IV. `2Cu^(o+)rarrCu+Cu^(2+)`

A

`Cr_(2)O_(7)^(2-)+2OH^(-) rarr 2 CrO_(4)^(2-)+H_(2)O`

B

`2 CrO_(4)^(2-) +2H^(+) rarr Cr_(2)O_(7)^(2-)+H_(2)O`

C

`2 MnO_(4)^(-)+3 Mn^(2+)+4 OH^(-) + 4OH^(-) rarr 5 MnO_(2)+2 H_(2)O`

D

`2 Cu^(+) rarr Cu+Cu^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
C, D
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