CHAPTER 3
Water and Life
,
,1. In a single molecule of water, two hydrogen atoms are
bonded to a single oxygen atom by?
A. hydrogen bonds.
B. nonpolar covalent bonds.
C. polar covalent bonds.
D. ionic bonds.
E. van der Waals interactions.
2. In a group of water molecules, hydrogen bonds form
between?
A. the oxygen atoms in different water molecules
B. Two hydrogen atoms in different water molecules
C. the oxygen atom in one water molecule and a
hydrogen atom in another water molecule
D. the hydrogen atoms in a single water molecule
E. None of the listed responses is Correct
3. Life on Earth is dependent on all the properties of water
as well as the abundance of water. Which property of
water is probably most important for the functioning of
organisms at the molecular level?
A. high specific heat
B. cohesion and high surface tension
C. versatility as a solvent
D. expansion upon freezing
E. high heat of vaporization
4. Some substances, such as oil and gasoline, will not
dissolve in water because?
A. oil and gasoline are organic compounds,
B. their molecules have no charges or partial charges to
which water molecules can adhere
C. their electrons are so stable that they do not exchange
atoms with water molecules
D. they do not ionize
E. their molecules are so large
7
, 5. The partial charges on a water molecule occur because
of?
A. widespread ionization
B. the unequal sharing of electrons between the
hydrogen and the oxygen atoms of a water molecule
C. the high electronegativity of hydrogen
D. covalent bonding
E. the achievement of a stable configuration by one atom of a
bond but not by the other partner
6. Water molecules have _____ than molecules of similar
size, such as ammonia and methane, reflecting its
capacity to absorb large amounts of heat.
A. less surface tension
B. a higher boiling point
C. a lower capacity for forming
D. lower specific heat hydrogen bonds
E. a lower melting point
7. Most of water's unique features (for example, its
versatility as a solvent, ability to moderate temperature,
and cohesive behavior) result from the fact that?
A. hydrogen is the only element without any neutrons.
B. oxygen attracts electrons more than hydrogen does.
C. oxygen has only one stable isotope, but hydrogen has
three.
D. oxygen has two unfilled electron shells.
E. More than one of the above is Correct.
8
Water and Life
,
,1. In a single molecule of water, two hydrogen atoms are
bonded to a single oxygen atom by?
A. hydrogen bonds.
B. nonpolar covalent bonds.
C. polar covalent bonds.
D. ionic bonds.
E. van der Waals interactions.
2. In a group of water molecules, hydrogen bonds form
between?
A. the oxygen atoms in different water molecules
B. Two hydrogen atoms in different water molecules
C. the oxygen atom in one water molecule and a
hydrogen atom in another water molecule
D. the hydrogen atoms in a single water molecule
E. None of the listed responses is Correct
3. Life on Earth is dependent on all the properties of water
as well as the abundance of water. Which property of
water is probably most important for the functioning of
organisms at the molecular level?
A. high specific heat
B. cohesion and high surface tension
C. versatility as a solvent
D. expansion upon freezing
E. high heat of vaporization
4. Some substances, such as oil and gasoline, will not
dissolve in water because?
A. oil and gasoline are organic compounds,
B. their molecules have no charges or partial charges to
which water molecules can adhere
C. their electrons are so stable that they do not exchange
atoms with water molecules
D. they do not ionize
E. their molecules are so large
7
, 5. The partial charges on a water molecule occur because
of?
A. widespread ionization
B. the unequal sharing of electrons between the
hydrogen and the oxygen atoms of a water molecule
C. the high electronegativity of hydrogen
D. covalent bonding
E. the achievement of a stable configuration by one atom of a
bond but not by the other partner
6. Water molecules have _____ than molecules of similar
size, such as ammonia and methane, reflecting its
capacity to absorb large amounts of heat.
A. less surface tension
B. a higher boiling point
C. a lower capacity for forming
D. lower specific heat hydrogen bonds
E. a lower melting point
7. Most of water's unique features (for example, its
versatility as a solvent, ability to moderate temperature,
and cohesive behavior) result from the fact that?
A. hydrogen is the only element without any neutrons.
B. oxygen attracts electrons more than hydrogen does.
C. oxygen has only one stable isotope, but hydrogen has
three.
D. oxygen has two unfilled electron shells.
E. More than one of the above is Correct.
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