2. Cell Chemistry & Cell Components

Which of the following effects can occur because of the high surface tension of water?

a) Lakes cannot freeze solid in winter even with extremely low temperatures.

b) A spider can walk across the surface of a small pond.

c) Organisms can resist temperature changes, although they give off heat due to chemical reactions.

d) Sweat can evaporate from the skin, helping to keep people from overheating.

Cohesive forces in liquid water occur when:

a) The H atoms on molecules of H₂O hydrogen bond to O atoms on adjacent molecules of H₂O.

b) The H atoms on molecules of H₂O hydrogen bond to other H atoms on adjacent molecules of H₂O.

c) The atoms on molecules of H₂O hydrogen bond to other O atoms on adjacent molecules of H₂O.

d) None of the above are correct.

Which of the following is not a property of water?

a. Water has a high heat capacity.

b. Water doesn't take heat with it when it evaporates.

c. Water is a polar solvent in which many solutes will dissolve.

d. Water serves as a cushion and lubricant in the body.

Which of the following is not a property of water?

a. Water has a high heat capacity.

b. Water doesn't take heat with it when it evaporates.

c. Water is a polar solvent in which many solutes will dissolve.

d. Water serves as a cushion and lubricant in the body.