Which reaction is NOT a redox reaction? (1) Zn + CuSO4 → ZnSO4 + Cu (2) 2KClO3 + I2 → 2KIO3 + Cl2 (3

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Question

Which reaction is NOT a redox reaction? (1) Zn + CuSO4 → ZnSO4 + Cu (2) 2KClO3 + I2 → 2KIO3 + Cl2 (3) H2 + Cl2 → 2HCl (4) BaCl2 + Na2SO4 → BaSO4 + 2NaCl

Accepted Answer

Correct Answer: d — BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaClStep-by-step Solution:A redox reaction involves a change in oxidation states of elements. Let's analyze each reaction:a: Zn (0) → Zn²⁺ (+2); Cu²⁺ (+2) → Cu (0). Oxidation states change → redox.b: In KClO₃, Cl is +5; in Cl₂, Cl is 0. I₂ (0) → I (+5) in KIO₃. Change occurs → redox.c: H₂ (0) → H⁺ (+1) in HCl; Cl₂ (0) → Cl⁻ (–1) in HCl. Change occurs → redox.d: BaCl₂ + Na₂SO₄ → BaSO₄ + 2NaCl. All oxidation states remain the same: Ba (+2), Cl (–1), Na (+1), S (+6), O (–2). No change → not a redox reaction; it is a double displacement precipitation reaction.Thus, option d is not a redox reaction.Key Concepts: Redox reactions definition, oxidation state calculation, identification of redox vs non-redox reactions (double displacement, precipitation, acid-base neutralization).

Which reaction is NOT a redox reaction? (1) Zn + CuSO4 → ZnSO4 + Cu (2) 2KClO3 + I2 → 2KIO3 + Cl2 (3) H2 + Cl2 → 2HCl (4) BaCl2 + Na2SO4 → BaSO4 + 2NaCl

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Which reaction is NOT a redox reaction? (1) Zn + CuSO4 → ZnSO4 + Cu (2) 2KClO3 + I2 → 2KIO3 + Cl2 (3) H2 + Cl2 → 2HCl (4) BaCl2 + Na2SO4 → BaSO4 + 2NaCl

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