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MHT CET2017ChemistryChemical Kinetics

The rate constant for a first order reaction is 7.0 × 10 - 4 s - 1 . If initial concentration of the reactant is 0.080 M, what is the half-life of the reaction?

Options

  1. A990 sec
  2. B79.2 sec
  3. C10.10 × 10 - 4 sec
  4. D12375 sec

Correct answer

A. 990 sec

Step-by-step solution

K = 0.693 t 1 / 2 ∴ t 1 / 2 = 0.693 7.0 × 10 - 4 = 990 sec

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