1.

For I_2+2erarr2I^-,standard reduction potential =+0.54 volt. For Br^(- )rarrBr_2 +2e^-, standard oxidation potential=-1.09 volt. For FerarrFe^(2+) +2e^-, standard oxidation potential=+0.44 volt. Which of the following reactions is non-spontaneous :

Answer»

`Br_2+2I^-` `rarr2Br^(-) +I_2`
`FE+Br_2 RARRFE^(2+)+2Br^-`
`Fe +I_2 rarrFe^(2+)+2I^_`
`I_2 +2Br^(-) rarr2I^(-)+Br_2`

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