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MHT CET202310 May 2023Morning ShiftChemistryChemical KineticsActual

What is the half life of a first order reaction if rate constant is 4.2 10⁻² per day?

Options

  1. A5.0 day
  2. B16.5 day
  3. C28.0 day
  4. D9.0 day

Correct answer

B. 16.5 day

Step-by-step solution

For a first order reaction, t _ 1 / 2 = 0.693 k = 0.693 4.2 10⁻² =16.5 days

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