Which of the following does not represents the correct order of the property indicated ?

Options

A. `Sc^(3+) gt Cr^(3+) gt Fe^(3+) gt Mn^(3+)` : Ionic radii
B. `Sc lt Ti lt Cr lt Mn` : Density
C. `Mn^(2+) gt Ni^(2+) gt Co^(2+) gt Fe^(2+)`: Ionic radii
D. `FeO lt CaO lt MnO lt CuO` : Basic nature

Answer

A

Explanation

The atomic radius of `Cr, Fe and Mn are approximately same. Hence their ionic radii
`Cr^(3+) ~~ Fe^(3+) ~~Mn^(3+)`