Which of the following is a correct statement for a first-order reaction?

  • A
    $t_{\text{completion}} = \text{finite}$
  • B
    $t_{1/2} \propto 1/a$
  • C
    $K$ unit is $\text{mol L}^{-1} \text{s}^{-1}$
  • D
    $t_{1/2} \times K = \text{constant}$ at constant temperature

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