Corrosion and Infrastructure Degradation Quiz
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Questions and Answers

What is corrosion?

  • The degradation of materials due to mechanical forces
  • The special name for the conservation of metal resources
  • The loss of useful properties of materials due to chemical or electrochemical reaction with the environment (correct)
  • The wearing away of materials due to physical deterioration
  • What is the science and art dedicated to preventing or controlling corrosion?

  • Material science
  • Chemical engineering
  • Environmental science
  • Corrosion engineering (correct)
  • Which of the following is NOT considered as corrosion?

  • Fretting
  • Erosion
  • Rust
  • Wear (correct)
  • Why is the conservation of metal resources important in the context of corrosion study?

    <p>To reduce material losses in metal structures</p> Signup and view all the answers

    What percentage of the United States' Gross National Product is estimated to be the annual cost of metallic corrosion?

    <p>4.2%</p> Signup and view all the answers

    In a multi-step chemical reaction, which step determines the rate law for the overall reaction?

    <p>The slowest step in the reaction</p> Signup and view all the answers

    What can be concluded about a reaction if the observed rate law matches the rate-determining step in the proposed mechanism?

    <p>The proposed mechanism is consistent with the observed rate law</p> Signup and view all the answers

    For the given reaction 2 NO (g) + O2 (g) 2 NO2 (g), why is a one-step reaction between two molecules of nitrogen oxide and a molecule of oxygen considered unlikely as the mechanism?

    <p>It violates the conservation of mass principle</p> Signup and view all the answers

    In which type of reactions can the rate law be directly deduced from the stoichiometry of a balanced chemical equation?

    <p>Elementary reactions only</p> Signup and view all the answers

    What term is used to describe the step in a multi-step reaction that limits the overall reaction rate?

    <p>Rate-determining step</p> Signup and view all the answers

    Why can't the rate law be directly deduced from the stoichiometry of a balanced chemical equation for most chemical reactions?

    <p>Because it involves more than one step</p> Signup and view all the answers

    In the context of inorganic reaction mechanisms, what does the slow step determine?

    <p>The overall reaction rate</p> Signup and view all the answers

    What statement best describes the significance of lability and inertness in the context of kinetics?

    <p>Lability and inertness are kinetic terms.</p> Signup and view all the answers

    What is the main flaw in an equation that contains a term not corresponding to any of the reactants or products?

    <p>It violates the principles of rate laws.</p> Signup and view all the answers

    What is the purpose of the K1, K-1, and K2 values in the context of inorganic reaction mechanisms?

    <p>To determine the rate constants of the elementary steps</p> Signup and view all the answers

    What does the statement 'we can only disprove a mechanism, but we can never prove a mechanism' imply about the study of reaction mechanisms?

    <p>It emphasizes the complexity of proving a mechanistic scheme.</p> Signup and view all the answers

    What type of reactions does fast spectrophotometry techniques typically analyze?

    <p>&quot;Rapid&quot; reactions relaxation</p> Signup and view all the answers

    According to the provided text, what is the role of solvent in determining substitution pathways for square planar reaction centers?

    <p>It influences the substitution pathways.</p> Signup and view all the answers

    "Measurements of Rates of Reactions" techniques can be used for which type of species with respect to their half-life times according to the text?

    <p>Primarily for &quot;inert&quot; and &quot;labile&quot; species with varying half-life times.</p> Signup and view all the answers

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