80. Which one of the following properties of water is primarily responsible for the ability of trees to draw water up from the roots to the leaves? A) polarity B) density C) solvent capability D) cohesion E) pH neutrality
81. Water is able to dissolve many compounds as a result of which of the following? A) the fact that water molecules are polar B) the fact that water molecules are nonpolar C) the fact that the hydrogen atoms in water molecules have a slight negative charge D) the fact that most nonwater molecules are hydrophobic E) the fact that water molecules are polar, and that the hydrogen atoms in water molecules have a slight negative charge
82. Which of the following statements about water is CORRECT? A) Ice is less dense than liquid water. B) Ice forms on top and sinks to the bottom of lakes and rivers. C) Ice is more dense than liquid water. D) Bodies of water freeze from the bottom up. E) Water molecules in ice demonstrate a disorganized, non-lattice arrangement.
83. Water is neither hydrophilic nor hydrophobic, because these terms only define the interaction of other molecules with water molecules. A) True B) False
84. Which of the following statements is TRUE regarding a polar molecule? A) A polar molecule is hydrophobic. B) A polar molecule is hydrophilic. C) A polar molecule will dissolve in water. D) A polar molecule will not dissolve in water. E) A polar molecule is hydrophilic and it will dissolve in water.
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