Answer: 1 mL gives 10 mL of O2 at STP on decay.
- A It contains 10 g of H2O2 per litre
- B It is a 10 molar solution of H2O2
- C 1 mL gives 10 mL of O2 at STP on decay
- D It is exactly 10% H2O2 by mass
Correct answer: C. 1 mL gives 10 mL of O2 at STP on decay
Explanation: Volume strength is the volume of O2 (at STP) liberated per unit volume of solution; '10 volume' gives 10 mL of O2 per mL of the solution.
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.