Which of the following is a disproportionation reaction? A)Cu₂S(l)+ O₂(g)→ 2 Cu(l)+ SO₂(g) B)3 Cu(s)+ 2 NO₃-(aq)+ 8 H⁺(aq)→ 3 Cu²⁺(aq)+ 2 NO(g)+ 4 H₂O(l) C)2 Cu⁺(aq)→ Cu(s)+ Cu²⁺(aq) D)Cu²⁺(aq)+ 4 NH₃(aq)→ Cu(NH₃)₄²⁺(aq)

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This is a disproportionation reaction because the same element (copper) is simultaneously oxidized to a higher oxidation state (+2 to 0) and reduced to a lower oxidation state (+2 to +1).

Which of the Following Is a Disproportionation Reaction