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Assertion and reason: rates and constants

Exercise and reference answers

Questions
  1. Reason
    The Arrhenius equation makes k an explicit function of T.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    The rate constant depends on temperature.
  2. Reason
    An elementary reaction happens in a single step, so its rate law mirrors it.
    Verdict
    Both are true; the reason explains the assertion.
    Assertion
    Order and molecularity agree for an elementary reaction.
  3. Reason
    A catalyst provides an alternate reaction path.
    Verdict
    Both are true; the reason does not explain the assertion.
    Assertion
    Rate is measured as concentration change per unit time.

Explanation

The last round pairs two true halves that do not explain one another. Source: syllabus Chemistry Part I, Ch 3 Chemical Kinetics.
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