Which of the following is not an example of redox reaction? (i) CuO + H2 → Cu + H2O (ii) Fe2O3 + 3CO → 2Fe + 3CO2 (iii) 2K + F2 → 2KF (iv) BaCl2 + H2 SO4 → BaSO4 + 2HCl

This is a Multiple Choice Questions as classified in NCERT Exemplar option (iv) is the correct answer. Redox reaction is defined as the simultaneous oxidation and reduction of reacting species. Thus, change in oxidation state will decide whether a reaction is redox or not. Thus, assigning the oxidation states as: (i) CuO + H2→ Cu + H2O Here, oxidation of H and reduction of Cu is taking place. (ii) Fe2O3 + 3CO→ 2Fe + 3CO2 Here, oxidation of C and reduction of Fe is taking place. (iii) 2K + F2→2KF Here, the oxidation of K and reduction of F is taking place. (iv) BaCl2 + H2SO4→ BaSO4 + 2HCl This is not a redox reaction, but it is a double displacement reaction.

Which of the following is not an example of redox reaction?

(i) CuO + H₂ → Cu + H₂O

(ii) Fe₂O₃ + 3CO → 2Fe + 3CO₂

(iii) 2K + F₂ → 2KF

(iv) BaCl₂ + H₂ SO₄ → BaSO₄ + 2HCl

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Alok Kumar Singh | Contributor-Level 10

9 months ago

This is a Multiple Choice Questions as classified in NCERT Exemplar

option (iv) is the correct answer.

Redox reaction is defined as the simultaneous oxidation and reduction of reacting species. Thus, change in oxidation state will decide whether a reaction is redox or not. Thus, assigning the oxidatio