Answer: Both true and the reason explains it.
- A Both true and the reason explains it
- B Both true but reason does not explain it
- C Assertion false but reason is true
- D Assertion true but the reason is false
Correct answer: A. Both true and the reason explains it
Explanation: H<sub>2</sub>O<sub>2</sub> has a non-planar open-book structure in which the two O–H bonds lie in different planes, so the reason correctly explains the assertion.
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.