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Using the data given below: E(Cr(2)O(7...

Using the data given below:
`E_(Cr_(2)O_(7)^(2-)|Cr^(3+))^(@)=1.33V E_(Cl_(2)|Cl^(-))^(@)=1.36V`
`E_(MnO_(4)^(-)|Mn^(2+))^(@)=1.51V E_(Cr^(3+)|Cr)=-0.74V`
Mark the strongest reducing agent.

A

`CI^(-)`

B

`Cr`

C

`Cr^(3+)`

D

`Mn^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
B
This problem includes concept of electrochemical series and standard reduction potential of the metal. Higher the nagative value of standard reduction potential, strongest will be the reducing agent. As value of SRP increases from negative to positive value nature of species changes from reducing to oxidising nature. Ans (b) Here, out of given four options standard reduction potential of chromium has highest negative value hence most powerful reducing agent is chromium.
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