In the given reaction
5H2O2+xClO2+2OH−→yCl−+zO2+6H2O
The values of x, y and z are:
x = 5, y = 5, z = 2
x = 2, y = 2, z = 5
x = 4, y = 4, z = 10
x = 5, y = 5, z = 5
5H2O2+2ClO2+2OH−→2Cl−+5O2+6H2O
When 7xy+5yz−3zx, 4yz+9zx−4y and −3xz+5x−2xy are added, we get 5xy+9yz+3zx+5x−4y.
In the redox reaction
xMnO +yPbO2+zHNO3⟶HMnO4 +Pb(NO3)2 +H2O