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NTA Abhyas NEET2020ChemistryChemical KineticsPractice

The rate constant for the first-order reaction is 60 s - 1 . How much time will it take to reduce the concentration of the reactant to 1/16 of initial value?

Options

  1. A4.6 × 10 - 2 s
  2. B4.6 × 10 4 s
  3. C4.6 × 10 - 3 s
  4. D4.6 × 10 - 4 s

Correct answer

A. 4.6 × 10 - 2 s

Step-by-step solution

t = 2.303 k log A 0 [ A ] = 2.303 60 log a a 16 = 2.303 60 log ⁡ 16 = 2.303 60 × 1.204 = 0.0462 s = 4.6 × 10 - 2 s

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