The standard reduction potential `E^(@)` of the following systems are:-
`{:(System,E^(@)("volts")),((i)MnO_(4)^(-)+8H^(+)+5e^(-)rarrMn^(2+)+4H_(2)O,1.51),((ii)Sn^(4+)+2e^(-)rarrSn^(2+)0.15,),((iii)Cr_(2)O_(7)^(2-)+14H^(+)+6e^(-)rarr2Cr^(3+)+7H_(2)O,1.33),((iv)Ce^(4+)+e^(-)rarrCe^(3+)1.61,):}`
The oxidising power of the various species decreases in the order

Options

A. `Ce^(4+) gt Cr_(2)O_(7)^(2-) gt Sn^(4+) gt MnO_(4)^(-)`
B. `Ce^(4+)gt MnO_(4)^(-) gt Cr_(2)O_(7)^(2-) gt Sn^(4+)`
C. `Cr_(2)O_(7)^(2-) gt Sn^(4+) gt Ce^(4+) gt MnO_(4)^(-)`
D. `MnO_(4)^(-) gt Ce^(4+) gt Sn^(4+) gt Cr_(2)O_(7)^(2-)`

Answer

B

Explanation

More the reduction potential stronger the oxidising agent.