Unit 9 Quiz-- Polar and Hydrogen Bonds

Multiple Choice (Choose the best answer.)

Try to answer these questions without refering to page 405, table 14.2 in your text. Use the periodic table as your guide.

1. Elements that are the most electronegative are found _____.

   in the upper left-hand corner of the periodic table.

   in the upper right-hand corner of the periodic table.

   in the lower left-hand corner of the periodic table.

   in the lower right-hand corner of the periodic table.

   scattered throughout the periodic table.

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2. Electronegativity is a measure of _____.

   the attraction of atoms for their electrons.

   the energy released when an electron is added to an atom.

   the energy required to remove an electron from an atom.

   More than one of the above are correct.

   None of the above are corrrect.

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3. If a single bond forms between N and F (N-F), which of the following statements is/are true?

   Nitrogen exerts a stronger attraction for the electrons in the bond than fluorine.

   Fluorine exerts a stronger attraction for the electrons in the bond than nitrogen.

   Nitrogen would have a partial positive charge and fluorine would have a partial negative charge.

   Both A and C are correct.

   Both B and C are correct.

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4. Order the following bonds from least to most polar.

   H - Cl < Cl - Cl < Br - Cl

   H - Cl < Br - Cl < Cl - Cl

   Cl - Cl < Br - Cl < H - Cl

   Cl - Cl < H - Cl < Br - Cl

   Br - Cl < H - Cl Cl - Cl

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5. Which of the following bonds would be mostly ionic?

   Na - S

   O - S

   F - S

   Al - S

   Se - S

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6. Hydrogen bonding occurs in molecules when _____.

   a hydrogen atom forms a covalent bond with one other atom.

   a hydrogen atom forms covalent bonds with more than one atom.

   a hydrogen atom bonded to small electrogeative atom is attracted an electron pair on an electronegative atom on an adjacent molecule.

   a hydrogen atoms form an ionic bond with one other atom.

   None of these are correct.

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7. Which of the following diagrams indicates how water molecules hydrogen bond?

   

   

   

   

   None of these are correct.

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8. Which of the molecules below would not form hydrogen bonds?

   CH₃OH

   CH₃OCH₃

   CH₃COOH

   NH₃

   None of these would hydrogen bond.

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9. Hydrogen bonding results in:

   higher heats of vaporization

   higher boilng points

   higher melting points

   lower vapor pressures

   All of the above are correct.

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