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Use the data given in Q.8 and find out ...

Use the data given in Q.8 and find out which of the following is the strongest oxidising agent?

A

`MnO_(4)^(-)`

B

`Cl^(-)`

C

`Cr^(2+)`

D

`Mn^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
A
In the given reaction, i has been oxidised to 1 and `Cr_(2)O_(7)^(2-)` has been reduced to `Cr^(3+)`
`therefore E_("cell")^(@)=E_(Cr_(2)O_(7)^(2-))^(@)-E_(I_(2))^(@)`
`therefore 0.79=1.33-E_(I_(2))^(@)` or `E_(I_(2))^(@)=1.33-0.79=0.54`
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