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Which is least stable in aqueous medium ...

Which is least stable in aqueous medium -

A

`Fe^(2+)`

B

`Co^(2+)`

C

`Ni^(2+)`

D

`Mn^(2+)`

Text Solution

Verified by Experts

The correct Answer is:
A
`Fe^(2+)(3d^(6))` quickly oxidises to `Fe^(3+)` (`3d^(5)`, more stable) in aqueous medium.
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