Chemical Bond Polarity Quiz
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Questions and Answers

What is the key factor that determines whether a molecule is polar or non-polar?

  • The electronegativity difference between the atoms
  • The number of bonds in the central atom
  • The symmetry of the molecular structure (correct)
  • The presence of unshared electron pairs
  • What is the range of electronegativity difference values for polar molecules?

  • 0 - 0.4
  • There is no specific range
  • 0.5 - 1.9 (correct)
  • 2.0 - 3.5
  • Which of the following statements is true for non-polar molecules?

  • Their dipole moments are asymmetrical
  • The bonds on the central atom involve different atoms
  • They have unshared electron pairs
  • Their dipole moments cancel out due to symmetry (correct)
  • What is the purpose of the electronegativity value?

    <p>To indicate the relative tendency of an atom to attract electrons</p> Signup and view all the answers

    What is the quantitative measure of the polarity of a bond called?

    <p>Dipole moment</p> Signup and view all the answers

    Which type of catalyst is used in the decomposition of hydrogen peroxide?

    <p>Manganese(IV) oxide</p> Signup and view all the answers

    What is the catalyst used in the nitration of benzene with concentrated sulfuric acid?

    <p>Vanadium(V) oxide</p> Signup and view all the answers

    In which chemical process is iron used as a catalyst for its reaction?

    <p>Conversion of SO2 into SO3</p> Signup and view all the answers

    Which catalyst is utilized in the hydrogenation of a C=C double bond?

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

    What type of catalyst is employed in the manufacture of ammonia by the Haber Process?

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

    According to collision theory, which of the following factors does NOT directly influence the rate of a chemical reaction?

    <p>The volume of the reaction vessel</p> Signup and view all the answers

    If the concentration of a reactant is doubled, how will the rate of the reaction be affected, assuming all other factors remain constant?

    <p>The rate will increase by a factor of 2</p> Signup and view all the answers

    If the temperature of a reaction is increased, which of the following statements best explains the effect on the reaction rate?

    <p>The reaction rate increases because the particles have more kinetic energy and collide more frequently</p> Signup and view all the answers

    For a solid reactant, which of the following changes would result in the greatest increase in reaction rate?

    <p>Decreasing the particle size of the solid</p> Signup and view all the answers

    A catalyst is added to a reaction. Which of the following statements best describes the role of the catalyst?

    <p>It provides an alternative reaction pathway with lower activation energy</p> Signup and view all the answers

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