Answer: Volume strength (V10, V20) based on O2 liberated.
- A Volume strength (V10, V20) based on O2 liberated
- B The fixed molar mass value of the H2O2 molecule
- C The measured pH of the aqueous solution
- D The bulk density of the solution alone
Correct answer: A. Volume strength (V10, V20) based on O2 liberated
Explanation: '10 volume' H2O2 means 1 L of the solution liberates 10 L of O2 at STP.
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.