For `I_(2)+2e^(-) rarr 2I^(c-)`, standard reduction potential `=+0.54 V.` For `2Br^(c-) rarr Br_(2)+2e^(-)`, standard oxidation potential `=-1.09V.` For `Fe rarr Fe^(2+)+2e^(-)`, standard oxidation potential `=+0.44V`. Which of the following reactions is `(` are `)` spontaneous ?

Options

A. `Br_(2)+2I^(c-) rarr 2Br^(c-)+I_(2)`
B. `Fe+Br_(2) rarr Fe^(2+)+2Br^(c-)`
C. `Fe +I_(2) rarr Fe^(2+)+2I^(c-)`
D. `I_(2)+2Br^(c-) rarr 2I^(c-) +Br_(2)`

Answer

a,b,c

Explanation

`E^(c-)._(cell)=1.09-0.54Vgt0 `
`b. E^(c-)._(cell)=1.09-(-0.44)Vgt0`
`c.` `E^(c-)._(cell)=0.54-(-0.44)Vgt0`
`d.` `E^(c-)._(cell)=0.54-1.09Vlt0`