Which of the following reactions does not involve a change in oxidation state?

Practice question

Question

Choose one · Correct answer highlighted

2H₂ + O₂ → 2H₂O Cu + 2AgNO₃ → Cu(NO₃)2 + 2Ag KOH + HNO₃ → KNO₃ + H₂O Correct 2FeCl₂ + Cl₂ → 2FeCl₃

In KOH + HNO₃ → KNO₃ + H₂O, all elements retain their oxidation states (K: +1, O: -2, H: +1, N: +5).

Share this question

Related blogs

Guides and insights connected to this topic

Virology 25 Jan 2026

Coronavirus Overview Coronaviruses (CoVs) are enveloped viruses (surrounded by a lipid membrane derived from host cells), belonging to the s...

Virology 25 Jan 2026

Structure of Coronavirus Coronaviruses (enveloped RNA viruses) fall in the virus family Coronaviridae, order Nidovirales. They are enveloped...

Virology 25 Jan 2026

Cucumber Mosaic Virus (CMV): Introduction and Importance Cucumber Mosaic Virus (CMV) (plant-infecting RNA virus) is one of the most economic...