Answer: Oxidising action (releases nascent oxygen).
- A Oxidising action (releases nascent oxygen)
- B Reducing action that decolourises dyes by hydrogenation
- C Its mildly acidic nature lowering the solution's pH
- D Its mildly alkaline nature raising the solution's pH
Correct answer: A. Oxidising action (releases nascent oxygen)
Explanation: H<sub>2</sub>O<sub>2</sub> bleaches by releasing nascent oxygen that oxidises coloured compounds, destroying chromophore groups.
Each water molecule's O-H bonds (covalent, solid) can hydrogen-bond (dashed) to neighbouring molecules, forming an extended network responsible for water's unusually high boiling point and density anomaly.
Concept context
The simplest and most abundant element in the universe. Study its unique position in the periodic table, isotopes (protium, deuterium, tritium), properties of water and hydrogen peroxide, and industrial uses.