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For given first order reaction, the reactant reduces to 1/4th its initial value in 10 min. The rate constant of the reaction is

Options

  1. A0.1386 mi n - 1
  2. B0.0693 mi n - 1
  3. C0.1386 mol L - 1 min - 1 ⁡
  4. D0.0693 mol L - 1 min - 1 ⁡

Correct answer

A. 0.1386 mi n - 1

Step-by-step solution

For the first order reaction, k = 2.303 t log ⁡ a a - x Given, t = 10 min a = a a - x = a 4 k = 2.303 10 log ⁡ a a 4 = 2.303 × 2 10 log ⁡ 2 = 0.1386 mi n - 1

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