A Levels Biology (9700)•9700/11/M/J/23

Explanation
Hydrogen Bonding and Water's Cohesive Properties
Steps:
- Identify the question: It asks for the term describing hydrogen bonding between water molecules, which involves attractions within the same substance.
- Recall definitions: Cohesion refers to intermolecular forces like hydrogen bonds holding molecules of the same type together.
- Eliminate unrelated terms: Adhesion involves different substances, while osmosis and diffusion are transport processes, not bonding types.
- Confirm: In water, hydrogen bonding creates cohesion, explaining surface tension and capillary action.
Why B is correct:
- Cohesion is defined as the attraction between like molecules due to hydrogen bonding, which in water forms a network of bonds between H and O atoms of adjacent molecules.
Why the others are wrong:
- A: Adhesion describes attractions between unlike molecules, such as water to glass.
- C: Osmosis is the diffusion of water across a semipermeable membrane driven by concentration gradients.
- D: Diffusion is the random movement of particles from high to low concentration, not a bonding interaction.
Final answer: B
Topic: Water
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