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For given, E(Cl(2)//Cl^(-))^(@)=1.36V,...

For given,
`E_(Cl_(2)//Cl^(-))^(@)=1.36V,E_(Cr^(3+)//Cr)^(@)=-0.74V`
`E_(Cr_(2)O_(7)^(2-)//Cr^(3+))^(@)=1.33V,E_(MnO_(4)^(-)//Mn^(2+))^(@)=1.51V`
then which of the following is strongest reducing agent ?

A

Cr

B

`Mn^(2+)`

C

`Cr^(3+)`

D

`Cl^(-)`

Text Solution

Verified by Experts

The correct Answer is:
A
Whose `E_(red)^(@)` is less so it becomes strongest reducing agent.
So, `E_(Cr^(3)//Cr)^(@)=0.74V`
When `E_(Mn^(2+)//MnO_(4)^(-))^(@)=-1.51V`
`E_(Cr^(+3)//Cr_(2)O_(7)^(-2))^(@)=-1.33V`
`E_(Cl^(-)//Cl_(2))^(@)=-1.36V`.
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