Answer: Acidified KMnO4 (a stronger oxidising agent).
- A Acidified KMnO4 (a stronger oxidising agent)
- B Iodide ion, which it oxidises to free iodine
- C Fe2+, which it oxidises to Fe3+
- D Cl2 gas, which it reduces to chloride ion
Correct answer: A. Acidified KMnO4 (a stronger oxidising agent)
Explanation: When a stronger oxidant like acidified KMnO4 reacts with H2O2, H2O2 reduces MnO4- by donating electrons: 2KMnO4 + 5H2O2 + 3H2SO4 → 2MnSO4 + 5O2 + K2SO4 + 8H2O.
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.