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Which of the following are redox reactions? Explain your answer on the basis of changes in oxidation number 1. CuSO4 + 2NaOH
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Answer #1

Reduction +2 +3 2. 2 Al + 3 mg so 4 - 3 mg + Al2(SO4) ₃ oxidation oxidation +5 +3 +2 +5 4. 2HNO3 + 3H3 As 03 2NO + 3 H 3 AsO4

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