Write two oxidizing and two reducing properties of `H_(2)O_(2)`.

Explanation

Hydrogen peroxide can act as both oxidising and reducing agent in both acid and basic medium.
Oxidation Properties : `H_(2)O_(2)+2H^(+)+2e^(-)overset("Acid")(to)2H_(2)O` , `E=+1.77V`
`H_(2)O_(2)+2e^(-)overset("Base")(to)2OH^(-)`, `E=+087V`
Eg : `H_(2)O_(2)` oxidises PbS to `PbSO_(4)` in acid medium
`PbS+4H_(2)O_(2) to PbSO_(4)+4H_(2)O`
`H_(2)O_(2)` oxidises formaldehyde to formic acid in basic medium .
`2HCHO+H_(2)O_(2) to 2HCOOH+H_(2)`
Reduction properties :
`H_(2)O_(2)overset("Acid")(to)2H^(+)+O_(2)+2e^(-)`
`H_(2)O_(2)+2OH^(-)overset("Base")(to)2H_(2)O+O_(2)`
Eg : `H_(2)O_(2)` reduces acidified potassium permanganate in acid medium .
`2KMnO_(4)+3H_(2)SO_(4)+5H_(2)O_(2) to K_(2)SO_(4)`
`+2MnSO_(4)+8H_(2)O+5O_(2)`
`H_(2)O_(2)` reduces potassium ferrycyanide in basic medium .
`2K_(3)[Fe(CN)_(6)]+2KOH+H_(2)O_(2) to 2K_(4)[Fe(CN)_(6)]+2H_(2)O+O_(2)`