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MHT CET202016 Oct 2020Evening ShiftChemistryChemical KineticsActual

A first order reaction has a rate constant 0.00813 ~min ⁻¹ . How long will it take for 60 % completion?

Options

  1. A98.7 ~min
  2. B56.35 ~min
  3. C112.7 ~min
  4. D62 77 ~min

Correct answer

C. 112.7 ~min

Step-by-step solution

(A) Original amount of reactant =100[ A ]_ t = Reactant remaining unreacted =100-60=40 For first order reaction, t= 2.303 0.00813 ~min ⁻¹ ₁₀ 100 40 =112.7 ~min

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