Intermolecular Interactions Quiz
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Questions and Answers

Which of the following is NOT caused by hydrogen bonding?

  • hydronium ions form in water
  • NaCl dissolves in water (correct)
  • DNA double helix
  • ice floats in water
  • protein alpha helices
  • When do Van der Waals (hydrophobic) interactions occur?

  • a polar molecule interacts with an ion
  • two molecules get closer together than they would in a covalent bond (correct)
  • a polar molecule with a dipole interacts with another polar molecule
  • a random charge fluctuation sets up a transient dipole in a non-ionic molecule
  • one ion interacts with an ion of opposite charge
  • Two molecules with polar covalent bonds are attracted to each other. The resulting bond could be:

  • Ionic bond
  • Van der Waals bond (correct)
  • Nonpolar covalent bond
  • Polar covalent bond
  • Hydrogen bond
  • Weak bonds are caused by:

    <p>Charge interactions</p> Signup and view all the answers

    Why is it important that most intermolecular interactions in cells are weak bonds?

    <p>They are more easily reversible</p> Signup and view all the answers

    What happens when water hydrates itself?

    <p>It forms a network of hydrogen-bonded water molecules</p> Signup and view all the answers

    To have a dipole moment (to be polar), a molecule must:

    <p>have a bond in which one atom has a substantially higher electronegativity than the other</p> Signup and view all the answers

    Which of the following CANNOT participate in hydrogen bond formation?

    <p>the H in C-H</p> Signup and view all the answers

    The pH inside a bacterial cell is 7. The pH outside is 6. What is the size of the H+ gradient?

    <p>There are 10 times as many protons inside the cell than outside</p> Signup and view all the answers

    Which of the following can serve as a hydrogen bond donor?

    <p>The H in an N-H bond</p> Signup and view all the answers

    Weak bonds are caused by:

    <p>Partial electron sharing</p> Signup and view all the answers

    A C-C bond in molecule A undergoes a random charge fluctuation. As molecule A comes close to a C-C bond in molecule B, what will happen to molecule B?

    <p>A dipole will be induced, which will weakly attract molecule B to molecule A</p> Signup and view all the answers

    The hydrophobic effect is used to explain:

    <p>how micelles form in an aqueous environment</p> Signup and view all the answers

    Which of the following pairs of atoms may be involved in hydrogen-bond formation, either as donor or acceptor?

    <p>S-H</p> Signup and view all the answers

    A difference between strong bonds and weak bonds is that:

    <p>Weak bonds involve temporary electron sharing between.</p> Signup and view all the answers

    To have a dipole moment (to be polar), a molecule must:

    <p>have a bond in which one atom has a substantially higher electronegativity than the other</p> Signup and view all the answers

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