Chemical Bonding and Interactions Quiz
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Questions and Answers

What type of molecule is water?

  • Non-polar
  • Ionic
  • Polar (correct)
  • Covalent

    • How many hydrogen bonds can a water molecule form on average?

  • 3-4 hydrogen bonds (correct)
  • 1-2 hydrogen bonds
  • 4-5 hydrogen bonds
  • 2-3 hydrogen bonds

    • What type of bond is the strongest bond?

  • Ionic bond
  • Hydrogen bond
  • Covalent bond (correct)
  • Van der Waals bond

    • What is responsible for the solubility of hydrophilic biomolecules in water?

    <p>Hydrogen bonding with water</p> Signup and view all the answers

    What type of bonding patterns make molecules more stable?

    <p>Resonance structures</p> Signup and view all the answers

    Which type of noncovalent interaction is characterized by interactions between two fixed charge centers of opposite sign or repulsion between charges of the same sign?

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

    In which medium does the high dielectric constant allow the weakening of ionic interactions and the dissolution of salts?

    <p>Water</p> Signup and view all the answers

    What type of interactions are characterized by dipole-dipole/electrostatic interactions between an electronegative atom and a hydrogen covalently bonded to another electronegative atom?

    <p>Hydrogen bonds</p> Signup and view all the answers

    What is the driving force behind hydrophobic interactions?

    <p>Minimizing the unfavorable entropy of water</p> Signup and view all the answers

    How is entropy related to the number of microstates a molecule can exist in?

    <p>$S = kB ln Ω$</p> Signup and view all the answers

    In the context of biochemical systems, when does a reaction become unfavorable or not spontaneous?

    <p>$ΔG &gt; 0$</p> Signup and view all the answers

    What is the typical bond length for a hydrogen bond?

    <p>2.5 to 3.5 Å</p> Signup and view all the answers

    Which group is considered the hydrogen-bond donor?

    <p>The group that includes the electronegative atom to which the hydrogen atom is covalently bonded</p> Signup and view all the answers

    What is the typical bond energy required to break a hydrogen bond?

    <p>4 to 20 kJ/mol</p> Signup and view all the answers

    What is the direct result of placing hydrophobic nonpolar molecules in an aqueous medium?

    <p>Disruption of the hydrogen bonding network of water and increased ordering</p> Signup and view all the answers

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