Chemistry Chapter on Water Properties

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Questions and Answers

Which of the following statements is TRUE about water's surface tension?

Surface tension is primarily due to the attraction between water molecules and the air above the surface.
Surface tension is stronger in pure water compared to water containing detergents or macromolecules. (correct)
Surface tension is solely caused by the cohesive forces within water molecules.
Surface tension is directly proportional to the vapor pressure of the liquid.

Which of the following interactions is NOT responsible for the ability of water to dissolve ionic compounds?

Induced dipole interactions (correct)
Dipole-dipole interactions
Hydrogen bonds
Ion-dipole interactions

Why is the boiling point elevation observed when a solute is added to water?

The added solute increases the surface tension of the water, making it harder to overcome the intermolecular forces and boil.
The added solute decreases the cohesion of water molecules, leading to a higher boiling point.
The added solute increases the vapor pressure of the water, leading to a higher boiling point.
The added solute lowers the vapor pressure of the water, requiring a higher temperature to reach the boiling point. (correct)

Which of the following correctly describes the relationship between water's polarity and its ability to form hydrogen bonds?

<p>Water's polarity is directly related to its ability to form hydrogen bonds, as the partial charges create strong attractive forces with other polar molecules. (B)</p> Signup and view all the answers