Which one of the following arrangements does not represent the correct order of the property stated against it?

Options

A. `Ni^(2+)ltCo^(2+)ltFe^(2+)ltMn^(2+):` ionic size
B. `Co^(3+)ltFe^(3+)ltSc^(3+):` stability in aqueous solution
C. `ScltTiltCrltMn:` number of oxidation states
D. `V^(2+)ltCr^(2+)ltMn^(2+)ltFe^(2+)`: paramagnetic behaviour

Answer

B, D

Explanation

On the basis of `CFSE`, stability of `Co^(3+)` is highest and stability of `Sc^(3+)` is minimum among `Co^(+3), Fe^(+3),Cr^(+3), Sc^(+3)`
`{:("Paramagnetic behaviour"),(V^(2+)ltCr^(2+)ltFe^(2+) lt Mn^(2+)):}`