Core
Reactions: Redox
Slide 40 of 42
Practice Questions
(h) O2 to O2-
(i) Cr2O72- to Cr3+
3. Find the
oxidation numbers of the underlined elements in these formulas.
(a)HClO,
(b) KClO3,
(c) MnO2,
(d) PbO2,
(e) PbSO4,
(f) K2SO4,
(g) NH4+,
(h) Na2O2,
(i) FeO, (j) Fe2O3,
(k) NaIO4,
(l) Fe3O4,
(m) Cr2O72-,
(n) MnO42-,
(o) NO3-,
(p) ClO3-.