Which of the following is not a redox reaction?

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2Na + 2H₂O → 2NaOH + H₂ Fe + CuSO₄ → FeSO₄ + Cu 2H₂O₂ → 2H₂O + O₂ BaCl₂ + H₂SO₄ → BaSO₄ + 2HCl Correct

In BaCl₂ + H₂SO₄ → BaSO₄ + 2HCl, no element changes oxidation state; it’s a double displacement reaction.

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