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1. Properties of water that render it so suited to its role as a medium of life include all EXCEPT:

	a.	Unrivaled ability to form hydrogen bonds.
	b.	Unusually high dielectric constant of water explains water's ability to surround ions and increase the ions' attraction for one another.
	c.	Unparalleled ability to orient around nonpolar solutes to promote hydrophobic interactions.
	d.	The small, but significant, tendency to form H⁺ and OH− ions.
	e.	None, all are true.

ANSWER:

2. All are true for water for a substance of its molecular weight that is neither metallic nor ionic EXCEPT:

	a.	a high surface tension.
	b.	a chemically inert solvent, which has a great capacity to dissolve a diverse spectrum of molecules and ions.
	c.	a positive volume of melting.
	d.	a high dielectric constant.
	e.	a high capacity to form hydrogen bonds

ANSWER:

3. The unrivaled ability to form ____ hydrogen bonds per liquid water molecule is the source of the strong intermolecular attractions unique to water.

	a.	1
	b.	2
	c.	3
	d.	4
	e.	5

ANSWER:

4. Because of its highly polar nature, water is an excellent solvent for polar substances, but NOT for:

	a.	salts.
	b.	sugars.
	c.	aldehydes and ketones.
	d.	hydrocarbons.
	e.	alcohols and amines.

ANSWER:

5. The solvent with the highest dielectric constant in this group is:

	a.	water.
	b.	acetic acid.
	c.	ethanol.
	d.	hexane.
	e.	benzene.

ANSWER:

6. Hydrogen bonds in ice are all EXCEPT:

	a.	directional.
	b.	straight.
	c.	weak.
	d.	responsible for the lower density of ice over liquid water.
	e.	holding water molecules in ice apart.

ANSWER:

7. Pure liquid water consists of H₂O molecules:

	a.	held in a rigid three-dimentional network.
	b.	with local preference for linear geometry.
	c.	with large numbers of strained or broken hydrogen bonds.
	d.	which do not switch H-bonds readily.
	e.	all are true.

ANSWER:

8. The average lifetime of a hydrogen bond connection in water is on the order of 10:

	a.	picoseconds.
	b.	microseconds.
	c.	milliseconds.
	d.	seconds.
	e.	nanoseconds.

ANSWER:

9. The ____ bonding of water with the polar functional groups on nonionic polar solutes such as sugars are ____ than the intermolecular attractions between solute molecules allowing solute molecules to readily dissolve in water.

	a.	ionic, stronger
	b.	hydrogen, weaker
	c.	hydrophobic, stronger
	d.	hydrogen, stronger
	e.	ionic, weaker

ANSWER:

10. The H-bonded water around an ionic substance tends to ____; and the H-bonded water around nonpolar solutes tends to ____.

	a.	inhibit ionization, promote hydrophobic interactions
	b.	inhibit ionization, inhibit hydrophobic interactions
	c.	not impact ionization, inhibit hydrophobic interactions
	d.	promote ionization, not impact hydrophobic interactions
	e.	promote ionization, promote hydrophobic interactions

ANSWER:

11. Amphiphilic (amphipathic) molecules include:

	a.	sugars.
	b.	acidic amino acids.
	c.	inorganic salts.
	d.	water.
	e.	salts of fatty acids.

ANSWER:

About this item

1. Properties of water that render it so suited to its role as a medium of life include all EXCEPT:

	a.	Unrivaled ability to form hydrogen bonds.
	b.	Unusually high dielectric constant of water explains water's ability to surround ions and increase the ions' attraction for one another.
	c.	Unparalleled ability to orient around nonpolar solutes to promote hydrophobic interactions.
	d.	The small, but significant, tendency to form H⁺ and OH− ions.
	e.	None, all are true.

ANSWER:

2. All are true for water for a substance of its molecular weight that is neither metallic nor ionic EXCEPT:

	a.	a high surface tension.
	b.	a chemically inert solvent, which has a great capacity to dissolve a diverse spectrum of molecules and ions.
	c.	a positive volume of melting.
	d.	a high dielectric constant.
	e.	a high capacity to form hydrogen bonds

ANSWER:

3. The unrivaled ability to form ____ hydrogen bonds per liquid water molecule is the source of the strong intermolecular attractions unique to water.

	a.	1
	b.	2
	c.	3
	d.	4
	e.	5

ANSWER:

4. Because of its highly polar nature, water is an excellent solvent for polar substances, but NOT for:

	a.	salts.
	b.	sugars.
	c.	aldehydes and ketones.
	d.	hydrocarbons.
	e.	alcohols and amines.

ANSWER:

5. The solvent with the highest dielectric constant in this group is:

	a.	water.
	b.	acetic acid.
	c.	ethanol.
	d.	hexane.
	e.	benzene.

ANSWER:

6. Hydrogen bonds in ice are all EXCEPT:

	a.	directional.
	b.	straight.
	c.	weak.
	d.	responsible for the lower density of ice over liquid water.
	e.	holding water molecules in ice apart.

ANSWER:

7. Pure liquid water consists of H₂O molecules:

	a.	held in a rigid three-dimentional network.
	b.	with local preference for linear geometry.
	c.	with large numbers of strained or broken hydrogen bonds.
	d.	which do not switch H-bonds readily.
	e.	all are true.

ANSWER:

8. The average lifetime of a hydrogen bond connection in water is on the order of 10:

	a.	picoseconds.
	b.	microseconds.
	c.	milliseconds.
	d.	seconds.
	e.	nanoseconds.

ANSWER:

	a.	ionic, stronger
	b.	hydrogen, weaker
	c.	hydrophobic, stronger
	d.	hydrogen, stronger
	e.	ionic, weaker

ANSWER:

10. The H-bonded water around an ionic substance tends to ____; and the H-bonded water around nonpolar solutes tends to ____.

	a.	inhibit ionization, promote hydrophobic interactions
	b.	inhibit ionization, inhibit hydrophobic interactions
	c.	not impact ionization, inhibit hydrophobic interactions
	d.	promote ionization, not impact hydrophobic interactions
	e.	promote ionization, promote hydrophobic interactions

ANSWER:

11. Amphiphilic (amphipathic) molecules include:

	a.	sugars.
	b.	acidic amino acids.
	c.	inorganic salts.
	d.	water.
	e.	salts of fatty acids.

ANSWER:

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About this item

1. Properties of water that render it so suited to its role as a medium of life include all EXCEPT:

	a.	Unrivaled ability to form hydrogen bonds.
	b.	Unusually high dielectric constant of water explains water's ability to surround ions and increase the ions' attraction for one another.
	c.	Unparalleled ability to orient around nonpolar solutes to promote hydrophobic interactions.
	d.	The small, but significant, tendency to form H⁺ and OH− ions.
	e.	None, all are true.

ANSWER:

2. All are true for water for a substance of its molecular weight that is neither metallic nor ionic EXCEPT:

	a.	a high surface tension.
	b.	a chemically inert solvent, which has a great capacity to dissolve a diverse spectrum of molecules and ions.
	c.	a positive volume of melting.
	d.	a high dielectric constant.
	e.	a high capacity to form hydrogen bonds

ANSWER:

3. The unrivaled ability to form ____ hydrogen bonds per liquid water molecule is the source of the strong intermolecular attractions unique to water.

	a.	1
	b.	2
	c.	3
	d.	4
	e.	5

ANSWER:

4. Because of its highly polar nature, water is an excellent solvent for polar substances, but NOT for:

	a.	salts.
	b.	sugars.
	c.	aldehydes and ketones.
	d.	hydrocarbons.
	e.	alcohols and amines.

ANSWER:

5. The solvent with the highest dielectric constant in this group is:

	a.	water.
	b.	acetic acid.
	c.	ethanol.
	d.	hexane.
	e.	benzene.

ANSWER:

6. Hydrogen bonds in ice are all EXCEPT:

	a.	directional.
	b.	straight.
	c.	weak.
	d.	responsible for the lower density of ice over liquid water.
	e.	holding water molecules in ice apart.

ANSWER:

7. Pure liquid water consists of H₂O molecules:

	a.	held in a rigid three-dimentional network.
	b.	with local preference for linear geometry.
	c.	with large numbers of strained or broken hydrogen bonds.
	d.	which do not switch H-bonds readily.
	e.	all are true.

ANSWER:

8. The average lifetime of a hydrogen bond connection in water is on the order of 10:

	a.	picoseconds.
	b.	microseconds.
	c.	milliseconds.
	d.	seconds.
	e.	nanoseconds.

ANSWER:

	a.	ionic, stronger
	b.	hydrogen, weaker
	c.	hydrophobic, stronger
	d.	hydrogen, stronger
	e.	ionic, weaker

ANSWER:

10. The H-bonded water around an ionic substance tends to ____; and the H-bonded water around nonpolar solutes tends to ____.

	a.	inhibit ionization, promote hydrophobic interactions
	b.	inhibit ionization, inhibit hydrophobic interactions
	c.	not impact ionization, inhibit hydrophobic interactions
	d.	promote ionization, not impact hydrophobic interactions
	e.	promote ionization, promote hydrophobic interactions

ANSWER:

11. Amphiphilic (amphipathic) molecules include:

	a.	sugars.
	b.	acidic amino acids.
	c.	inorganic salts.
	d.	water.
	e.	salts of fatty acids.

ANSWER:

About this item

1. Properties of water that render it so suited to its role as a medium of life include all EXCEPT:

	a.	Unrivaled ability to form hydrogen bonds.
	b.	Unusually high dielectric constant of water explains water's ability to surround ions and increase the ions' attraction for one another.
	c.	Unparalleled ability to orient around nonpolar solutes to promote hydrophobic interactions.
	d.	The small, but significant, tendency to form H⁺ and OH− ions.
	e.	None, all are true.

ANSWER:

2. All are true for water for a substance of its molecular weight that is neither metallic nor ionic EXCEPT:

	a.	a high surface tension.
	b.	a chemically inert solvent, which has a great capacity to dissolve a diverse spectrum of molecules and ions.
	c.	a positive volume of melting.
	d.	a high dielectric constant.
	e.	a high capacity to form hydrogen bonds

ANSWER:

3. The unrivaled ability to form ____ hydrogen bonds per liquid water molecule is the source of the strong intermolecular attractions unique to water.

	a.	1
	b.	2
	c.	3
	d.	4
	e.	5

ANSWER:

4. Because of its highly polar nature, water is an excellent solvent for polar substances, but NOT for:

	a.	salts.
	b.	sugars.
	c.	aldehydes and ketones.
	d.	hydrocarbons.
	e.	alcohols and amines.

ANSWER:

5. The solvent with the highest dielectric constant in this group is:

	a.	water.
	b.	acetic acid.
	c.	ethanol.
	d.	hexane.
	e.	benzene.

ANSWER:

6. Hydrogen bonds in ice are all EXCEPT:

	a.	directional.
	b.	straight.
	c.	weak.
	d.	responsible for the lower density of ice over liquid water.
	e.	holding water molecules in ice apart.

ANSWER:

7. Pure liquid water consists of H₂O molecules:

	a.	held in a rigid three-dimentional network.
	b.	with local preference for linear geometry.
	c.	with large numbers of strained or broken hydrogen bonds.
	d.	which do not switch H-bonds readily.
	e.	all are true.

ANSWER:

8. The average lifetime of a hydrogen bond connection in water is on the order of 10:

	a.	picoseconds.
	b.	microseconds.
	c.	milliseconds.
	d.	seconds.
	e.	nanoseconds.

ANSWER:

	a.	ionic, stronger
	b.	hydrogen, weaker
	c.	hydrophobic, stronger
	d.	hydrogen, stronger
	e.	ionic, weaker

ANSWER:

10. The H-bonded water around an ionic substance tends to ____; and the H-bonded water around nonpolar solutes tends to ____.

	a.	inhibit ionization, promote hydrophobic interactions
	b.	inhibit ionization, inhibit hydrophobic interactions
	c.	not impact ionization, inhibit hydrophobic interactions
	d.	promote ionization, not impact hydrophobic interactions
	e.	promote ionization, promote hydrophobic interactions

ANSWER:

11. Amphiphilic (amphipathic) molecules include:

	a.	sugars.
	b.	acidic amino acids.
	c.	inorganic salts.
	d.	water.
	e.	salts of fatty acids.

ANSWER:

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