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- 1. Multiple Choice
Which elements below are most likely to form an ionic bond?
Na and Cl
C and O
N and O
Si and Cl
H and O
- 2. Multiple Choice
Which elements below will most likely form a covalent bond?
Na and Cl
C and O
H and H
Ni and Cl
H and O
- 3. Multiple Choice
Elements with atomic numbers of 6, 14, and 22 all have what in common?
Same number of electrons
Same atomic mass
Same valence and will form the same number of covalent bonds
All of the above
None of the above
- 4. Multiple Choice
Geckos can climb smooth walls and spiders can walk on water. Identify the types of bonds involved that allow both creatures to do these things.
Polar covalent and van der waals
nonpolar covalent and polar covalent
van der waals and hydrogen bonds
ionic bonds and hydrogen bonds
None of the above
- 5. Multiple Choice
Buffers can bind to one of the chemicals shown in the picture. How will that change this reversible reaction?
The reaction will come to a dead stop
HCO3- concentration will increase.
HCO3- concentration will release fewer ions
H2CO3 concentration will not change.
H2O will increase
- 6. Multiple Choice
What type of bond between water molecules is responsible for giving water special properties, like high cohesion?
ionic bonds
nonpolar covalent bonds
polar covalent bonds
hydrogen bonds
- 7. Multiple Choice
What are the 4 emergent properties of water that are important for life?
cohesion, temperature moderation, hydrogen bonds expand when in solid form, universal solvent
cohesion, hydrogen bonds expand when in solid form, capillarity, heat of vaporization
temperature moderation, universal solvent, high surface tension, capillarity
polarity, hydrogen bonding, high specific heat, capillarity
- 8. Multiple Choice
If a molecule has a high specific heat, that is directly related to which of the following?
At boiling, it changes into a vapor
More heat is needed to raise its temperature?
When in solid form, it will float on its liquid form
If salt is added, then that will lower its freezing point
- 9. Multiple Choice
What will result when water is treated with chemicals that reduce its surface tension?
Droplets will form a thin film instead of beads
Droplets will be smaller when dropping from a sink
Water striders (Jesus bugs) will sink
All of the above will occur
None of the above will occur
- 10. Multiple Choice
Why is Los Angeles cooler than Palmdale?
The ocean water creates cooler winds
Water's high specific heat keeps the ocean cooler than land
LA is closer to the ocean than Palmdale
The water absorbs heat from nearby land
- 11. Multiple Choice
Which one is a compound?
Gold (Au)
Phosphorus (P)
Nitrogen (N)
All of these
None of these
- 12. Multiple Choice
Chemical analysis of an unknown item shows it contains mostly Ca and S. Is it from a living organism?
It is! Two of the major components of living things are Ca and S/
It is! Living organisms also contain mostly P.
It is not. Living things do not contain any S at all.
Is is not. Living things contains more C and O than Ca and S
- 13. Multiple Choice
Radioisotopes, which are used in the lab with biological examples, are used to do each of the following except...
disinfecting wounds
medical imaging
tracing the movements of cells
dating fossils
- 14. Multiple Choice
This type of bond allows for the sharing of electrons.
Hydrogen bonds
Ionic bonds
Covalent bonds
Van der Waal bonds
None of the above
- 15. Multiple Choice
In a chemical reaction, the chemicals to the left of the arrow are the ________, and those to the right of the arrow are _________.
products, reactants
reactants, flow of energy
reactants, products
products, flow of energy
- 16. Multiple Choice
Which water properties account for the movement of water up a tree?
cohesion and adhesion
cohesion and specific heat
adhesion and lower density
adhesion and universal solvent
- 17. Multiple Choice
An alien is discovered that is made mostly of water. Warmer temperatures cause this creature to lose water. This water loss must help it....
reduce temperature
transmit signals
eliminate waste
reduce weight
- 18. Multiple Choice
Which property of water are organisms in cold waters most grateful for?
specific heat
adhesion
low density in solid form
odorlessness
- 19. Multiple Choice
Water becomes less dense when it freezes due to what?
polar covalent bonds
double bonds
hydrogen bonds
polar ionic bonds
none of the above
- 20. Multiple Choice
You are mostly water, but one part of your cells does not mix well with water. This part is the....
salt reserve
ions
DNA
cell membrane
hemoglobin
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