Question

Consider the following reactions with respect to reactants and products only. (i) PbS + H$_2$O$_2$?PbSO$_4$ + H$_2$O (ii) Ag$_2$O + H$_2$O$_2$?Ag + O$_2$ + H$_2$O (iii) K$_4$[Fe(CN)$_6$] + H$_2$O$_2$ + H$_2$SO$_4$? K$_2$SO$_4$ + K$_3$[Fe(CN)$_6$] + H$_2$O (iv) K$_3$[Fe(CN)$_6$] + H$_2$O$_2$ + KOH ? K$_4$[Fe(CN)$_6$] + O$_2$ (v) K$_2$Cr$_2$O$_7$ + H$_2$O$_2$ + H$_2$SO$_4$?K$_2$SO$_4$ + Cr$_2$(SO$_4$)$_3$ + O$_2$ + H$_2$O (vi) CrCl$_3$ + H$_2$O$_2$ + KOH ? K$_2$CrO$_4$ + KCl + H$_2$O In how many reactions oxidising nature of H$_2$O$_2$ is observed.

          Consider the following reactions with respect to reactants and products only.
(i) PbS + H$_2$O$_2$?PbSO$_4$ + H$_2$O
(ii) Ag$_2$O + H$_2$O$_2$?Ag + O$_2$ + H$_2$O
(iii) K$_4$[Fe(CN)$_6$] + H$_2$O$_2$ + H$_2$SO$_4$? K$_2$SO$_4$ + K$_3$[Fe(CN)$_6$] + H$_2$O
(iv) K$_3$[Fe(CN)$_6$] + H$_2$O$_2$ + KOH ? K$_4$[Fe(CN)$_6$] + O$_2$
(v) K$_2$Cr$_2$O$_7$ + H$_2$O$_2$ + H$_2$SO$_4$?K$_2$SO$_4$ + Cr$_2$(SO$_4$)$_3$ + O$_2$ + H$_2$O
(vi) CrCl$_3$ + H$_2$O$_2$ + KOH ? K$_2$CrO$_4$ + KCl + H$_2$O
In how many reactions oxidising nature of H$_2$O$_2$ is observed.

Consider the following reactions with respect to reactants and products only.
(i) PbS + H2O2?PbSO4 + H2O
(ii) Ag2O + H2O2?Ag + O2 + H2O
(iii) K4[Fe(CN)6] + H2O2 + H2SO4? K2SO4 + K3[Fe(CN)6] + H2O
(iv) K3[Fe(CN)6] + H2O2 + KOH ? K4[Fe(CN)6] + O2
(v) K2Cr2O7 + H2O2 + H2SO4?K2SO4 + Cr2(SO4)3 + O2 + H2O
(vi) CrCl3 + H2O2 + KOH ? K2CrO4 + KCl + H2O
In how many reactions oxidising nature of H2O2 is observed.

Added by Robert M.

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