AnswersTX-Integrated Physics and ChemistryLab: Ionic and Covalent Bonds

Properties of Water Answers

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Which example best shows that the chemistry of water is helpful to plants?

A
Water’s polarity produces a high density, which allows water to move to the leaves.
B
Water’s bent shape causes a slow passage of nutrients up to the leaves of plants.
C
Water’s polarity causes cohesion that pulls other water molecules up through a plant.
D
Water’s bent shape reduces its own passage through the cell membranes of roots.
2
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Water molecules are polar because the

A
water molecule has a linear shape.
B
water molecule has a bent shape.
C
oxygen atom has fewer electrons around it.
D
hydrogen atom forms an ionic bond with oxygen.
3

Which best explains the high surface tension of water?

A
its high density
B
its ion-dipole interactions
C
its adhesive interactions
D
its hydrogen bonding interactions
4

Which best explains why water is able to “stick” to the side of glass?

A
Strong adhesive forces exist between different water molecules.
B
Strong cohesive forces exist between different water molecules.
C
Strong adhesive forces exist between glass and the water molecules.
D
Strong cohesive forces exist between glass and the water molecules.
5

Which best explains why water has a high specific heat?

A
Hydrogen bonds decrease the amount of energy that is required for the temperature to change.
B
Hydrogen bonds increase the amount of energy that is required for the temperature to change.
C
Ion-dipole interactions increase the amount of energy that is required for the temperature to change.
D
Ion-dipole interactions decrease the amount of energy that is required for the temperature to change.
6

Which is a cause of polarity in water molecules?

A
partial negative charge on the hydrogen atoms
B
partial positive charge on the oxygen atom
C
high electronegativity difference between oxygen and hydrogen
D
low electronegativity difference between oxygen and hydrogen
7

Which is the best example of water regulating an organism’s body temperature?

A
a jogger sweating after a run
B
a fish passing water over its gills
C
a deer taking a drink from a stream
D
a leaf using water for photosynthesis
8

Which statement would be true about a water molecule if it had a linear shape?

A
It would contain ionic bonds.
B
It would have improved special properties.
C
It would easily bond with other water molecules.
D
It would be a nonpolar molecule.
9

Water can resist a greater external force than ethanol can. Which statement best describes this difference?

A
Water has less capillary action than ethanol.
B
Water has greater capillary action than ethanol.
C
Water has lower surface tension than ethanol.
D
Water has greater surface tension than ethanol.
10

Which statement best explains water’s ability to dissolve covalent compounds?

A
Water can dissolve polar covalent compounds through dipole-dipole interactions.
B
Water can dissolve nonpolar covalent compounds through hydrogen-bonding interactions.
C
Water can dissolve polar covalent compounds through ion-dipole interactions.
D
Water can dissolve nonpolar covalent compounds through dipole-dipole interactions.

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Properties of Water Answers — TX-Integrated…