1. The tendency for an atom to attract electrons to itself in a chemical bond is called
A. polarity.
B. electronegativity.
C. hydrophilicity
D. electrophilicity.
2. If atoms with greatly differing electronegativitie
...
1. The tendency for an atom to attract electrons to itself in a chemical bond is called
A. polarity.
B. electronegativity.
C. hydrophilicity
D. electrophilicity.
2. If atoms with greatly differing electronegativities form a bond, that bond will be
A. polar.
B. nonpolar.
C. amphipathic.
D. acidic.
3. Many of the properties of water can be accounted for by the fact that
A. it is polar
B. it forms hydrogen bonds
C. it is a bent molecule
D. all of these are true
4. Which of the following is true about ionic compounds?
A. They are more likely to dissolve in non-polar solvents than covalent compounds.
B. They always dissolve completely in water.
C. They never dissolve in polar solvents.
D. Some of them dissolve completely in water or other polar solvents, while others do not.
5. Which of the following is a correct listing of electronegativity values, from low to high?
A. C, H, O, N
B. N, H, O, C
C. H, C, N, O
D. H, C, O, N
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6. Which of the following elements has the highest electronegativity?
A. C
B. H
C. N
D. O
E. P
7. The water molecule is polar because:
A. Electrons are not distributed symmetrically in the molecule.
B. The hydrogen atoms are found on one "side" of the molecule.
C. Hydrogen is less electronegative than oxygen.
D. The hydrogen atoms are found on one "side" of the molecule and hydrogen is less electronegative than
oxygen.
E. All of these are correct.
8. Which of the following molecules is polar?
A. CCl4
B. CH4
C. CO2
D. NH3
E. None of these molecules is polar.
9. Which of the following molecules is amphipathic?
A. sodium chloride
B. acetic acid
C. benzene
D. palmitic acid
10. Which of the following classes of compounds is hydrophilic?
A. Sugars
B. Fatty acids
C. Amino acids
D. Sugars and amino acids.
E. All of these
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