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Question

What type of reactions are represented by the following equations?
(a) CaO + CO2 CaCO3
(b) 2Na + 2H2O 2NaOH + H2
(c) Mg + CuSO4 MgSO4 + Cu
(d) NH4NO2 N2 + 2H2O
(e) CuSO4 + 2NaOH Cu(OH)2 Na2SO4

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