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- 1. Multiple Choice
A water molecule is held together by this type of bond
Ionic
Non polar covalent
Hydrogen
Polar covalent
- 2. Multiple Choice
A water strider can skate along the top of a pond because:covalent bonds result in water cohesionhydrogen bonds result in water cohesion (surface tension)water striders have adapted to take advantage of water cohesionlow surface tension of water - 3. Multiple ChoiceWhy can water have no net charge but have slight charges in different parts of the molecule?The oxygen end is slightly negative and the hydrogen end is slightly positiveThe hydrogen end is slightly negative and the oxygen end is slightly positiveThe hydrogen and oxygen ends change in polarityBecause it is hydrophobic
- 4. Multiple ChoiceAttractions between water molecules are calledCovalent bondsIonic bondsPolar bondsHydrogen bonds
- 5. Multiple ChoiceAcids have more what?OH ionsOH- ionsH+ ionsAll of the above
- 6. Multiple ChoiceWhich of the following is LEAST likely to dissolve in water?nonpolar fats and oilspolar sugar moleculessalt made of a positive sodium ion and a negative chloride ionall of the substances will dissolve easily in water
- 7. Multiple ChoiceWater is a universal solvent because it...It can be found anywhereIt freezes when it gets coldfloats when frozenDissolves most substances
- 8. Multiple ChoicePure water has aNeutral pHNegative pHPositive pHBoth Negative and Positive pH
- 9. Fill in the Blank
The property of water molecules being attracted to other water molecules is called _________.
- 10. Fill in the Blank
The property of water molecules being attracted to other substances/materials (glass, soil) is called __________.
- 11. Multiple Choice
When the temperature on Earth drops abruptly, the land cools down faster than the sea.
Which property of water allows water to be resistant to sudden temperature changes?
Density
Adhesion
High specific heat capacity
Surface tension
- 12. Multiple Choice
As liquid water becomes ice, the space between water molecules increases.
Which property of water does this change describe?
Water has a high boiling point
Water has a high specific heat capacity.
Water molecules have adhesive properties.
Water is less dense as a solid than a liquid.
- 13. Multiple Choice
A new dish soap claims that it is able to remove grease from pots and pans while still fully dissolving in the dishwasher water.
Which of the following best explains the ideal structure of the dish soap molecule?
The dish soap molecule must be polar at one end to dissolve grease, and nonpolar at the other end so it can dissolve in water.
The dish soap molecule must be nonpolar so that it can dissolve in both grease and water.
The dish soap molecule must be polar so that it can dissolve both grease and water.
The dish soap molecule must be nonpolar at one end to dissolve grease, and polar at the other end so it can dissolve in water.
- 14. Multiple Choice
Water has a boiling point of 100.0∘C, which is unusually high compared to many other liquids.
Which of the following properties allows water to have a high boiling point?
It contains only three atoms.
It is a small, covalent molecule.
It contains oxygen.
It can form hydrogen bonds.
- 15. Multiple Choice
The air temperature ranges of several Southern California cities in August are shown in the table below.
Which of the following best explains why coastal cities like San Diego often have a smaller air temperature range than inland cities?
The cohesive tendency of water molecules causes high surface tension, so heat is unable to penetrate the top layer of the ocean and escape into the air.
The high heat capacity of water allows the ocean to moderate the temperature of nearby air and land.
The adhesive properties of ocean water allow the water molecules to stick to one another, preventing temperature change of the air above it.
Because water is less dense as a solid than as a liquid, it easily vaporizes, causing excess heat to escape into the air near coastal cities.
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