The velocity constant of a reaction is $K$. Which of the following statements is not true regarding $K$?

  • A
    $K$ is a constant for a reaction at a given temperature.
  • B
    The value of $K$ changes when the temperature changes.
  • C
    $K$ is the velocity of the reaction at unit concentrations of the reactant.
  • D
    $K$ is a constant for all reactions.

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