1.

Hydrogen peroxide oxidises [Fe(CN)_6]^(4-)to [Fe(CN)_6]^(3-) in acidic medium but reduces [Fe(CN)_6]^(3-) to [Fe(CN)_6]^(4-)in alkaline medium. The other products formed are, respectively.

Answer»

`(H_2O+O_2)` and `H_2O`
`(H_2O + O_2)` and `(H_2O+ OH^-)`
`H_2O` and `(H_2O+ O_2)`
`H_2O` and `(H_2O+OH^-)`

Solution :`[Fe(CN)_6]^(4-) + 1/2H_2O_2 + H^(+) to [Fe(CN)_6]^(3-) + H_2O`
`[Fe(CN_6)]^(3-) + 1/2 H_2O_2 + OH^(-) to [Fe(CN)_6]^(4-) + H_2O + 1/2O_2`


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