Oxidising agent
$PbS + 4{H_2}{O_2} \to \mathop {PbS{O_4}}\limits_{White\,ppt.} + 4{H_2}O$
Reducing agent
$\mathop {A{g_2}O}\limits_{(moist)} + {H_2}{O_2} \to 2Ag + {H_2}O + {O_2}$