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Some Basic Concepts of Chemistry
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Question
Which of the following is an example of a redox reaction?
A. NaCl + AgNO3 → AgCl + NaNO3
B. CaCO3 → CaO + CO2
C. NH3 + HCl → NH4Cl
D. Zn + CuSO4 → ZnSO4 + Cu
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