How would you account for the increasing oxidising power in the series `VO_2^(o+)ltCr_2O_7^(2-)< MnO_4^(ɵ)`?

Options

A. `VO_(2)^(+) lt Cr_(2)O_(7)^(2-) lt MnO_(4)`
B. `Cr_(2)O_(7)^(2) lt VO_(2)^(+) lt MnO_(4)^(-)`
C. `Cr_(2)O_(7)^(2-) lt MnO_(4)^(-) lt VO_(2)^(-)`
D. `MnO_(4)^(-) lt Cr_(2)O_(7)^(2-) lt VO_(2)^(+)`

Answer

A

Explanation

Oxidising power increases with increase of oxidation number of central atom.
`Mn (O.S.)` in `MnO_(4)^(-) = +7`
`Cr (o .S.)` in `Cr_(2)O_(7)^(2-) = +6`
`V (O.S.)` in `VO_(2)^(+) = +5`