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Pick the redox reaction! I) H2SO4 + 2NH3 → (NH4)2SO4 II) H2SO4 + Na2CO3 → Na2SO4...

Pick the redox reaction! I) H2SO4 + 2NH3 → (NH4)2SO4 II) H2SO4 + Na2CO3 → Na2SO4 + H2O + CO2 III) 2H2SO4 + Cu → CuSO4 + 2H2O + SO2 IV) 2K2CrO4 + H2SO4 → K2Cr2O7 + K2SO4 + H2O

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Answer #1

Redox reaction is a reaction in which one reactant gets oxidised and the other reactant gets reduced.

The 3rd equation is a redox reaction. Here, Cu is oxidized (loss of electrons) to Cu2+ and sulfur in H2SO4 is reduced(gain of electrons) from +6 state to +4 state in SO2 .

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