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Which of These Is/are Oxidation-Reduction Reaction(s)

Question 29

Multiple Choice

Which of these is/are oxidation-reduction reaction(s) ?
I. PCl3 + 3H2O → 3HCl + H3PO3
II. Fe2O3 + 3CO → 2Fe + 3CO2
III. CaCO3 + HClO3 → Ca(ClO3) 2 + CO2 + H2O


A) I only
B) II only
C) I and II
D) I and III
E) I, II, and III

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