Water Quiz
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5 questions, one answer each
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1. Why do water molecules form hydrogen bonds with each other?
- A. They share electrons equally
- B. They are ionic compounds
- C. The molecule is a dipole, with a δ+ hydrogen attracted to a δ− oxygen on another molecule
- D. Hydrogen atoms are larger than oxygen atoms
2. Which property of water is most directly responsible for keeping the temperature of a lake stable?
- A. Surface tension
- B. High specific heat capacity
- C. Incompressibility
- D. Being a solvent
3. Which of these will dissolve most readily in water?
- A. A lipid
- B. A non-polar gas such as nitrogen
- C. Sodium chloride
- D. Wax
4. What is the best explanation of surface tension in water?
- A. Hydrogen bonds make molecules at the surface pulled inwards and sideways by neighbouring molecules
- B. Water has a high specific heat capacity
- C. Water is incompressible
- D. Ice forms at the surface first
5. A pond freezes over in winter, but fish below survive. Which statement is the best explanation?
- A. Ice is denser than water and sinks, warming the pond
- B. Water has maximum density at 4 °C and ice is less dense, so ice floats and insulates the liquid water below
- C. Ice has no hydrogen bonds so it conducts heat from the surface
- D. Water below the ice is colder than the ice