Which pair of molecules are both oxidizing agents in redox reactions?

• A. H2 and CO
• B. H2O and NH3
• C. N2 and CH4
• D. O2 and H2O2

Answer: (D)

Verified step by step guidance

1. Understand the concept of oxidizing agents: In a redox reaction, an oxidizing agent is a substance that gains electrons and is reduced in the process. It causes another substance to be oxidized.
2. Identify the role of oxygen in redox reactions: Oxygen ( $O_2$ ) is a common oxidizing agent because it readily accepts electrons to form oxide ions.
3. Consider hydrogen peroxide ( $H_2{O}_2$ ): Hydrogen peroxide is also an oxidizing agent because it can decompose to form water and oxygen, releasing electrons in the process.
4. Evaluate the given pairs: Analyze each pair of molecules to determine if they can act as oxidizing agents. For example, $H_2$ and $\mathrm{CO}$ are not typically oxidizing agents.
5. Conclude with the correct pair: Based on the analysis, $O_2$ and $H_2{O}_2$ are both oxidizing agents in redox reactions.