Окислительно-восстановительной не является реакция, уравнение которой –

1) 2Mg + CO2 = 2MgO + C

2) FeCl3 + 3NaOH = 3NaCl + Fe(OH)3

3) 2NaI + Br2 = 2NaBr + I2

4) 3H2S + 8HNO3 = 3H2SO4 + 8NO + 4H2O
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