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Standard electrode potentials are : Fe...

Standard electrode potentials are :
`Fe^(2+) "|" Fe (E^(@) = - 0.44 V), Fe^(3+) "|" Fe^(2+) (E^(@) = 0.77 V) Fe^(2+), Fe^(3+)` and Fe blocks are kept together, then

A

`Fe^(3+)` increases

B

`Fe^(3+)` decreases

C

`Fe^(2+), Fe^(3+)` remain unchanged

D

`Fe^(2+)` decreases

Text Solution

Verified by Experts

The correct Answer is:
b
Cell reaction `: 2Fe^(3+)+Fe rarr 3Fe^(2+)`
`E^(c-)._(cell)=0.77-(-0.44)=1.21V`
`implies Fe^(3+)` and `Fe` will reduce.
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