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MHT CET202014 Oct 2020Evening ShiftChemistryChemical KineticsActual

The rate constant for first order reaction is 0.02232 ~min ⁻¹ . Calculate the time required for 75 % completion of the reaction.

Options

  1. A62 12 ~min
  2. B28.31 ~min
  3. C12.77 ~min
  4. D48 12 ~min

Correct answer

A. 62 12 ~min

Step-by-step solution

If [ A ]₀=100, [ ~A ]_ t =100-75=25 k =0.02232 ⁻¹, t=?t= 2.303 k [ A ]₀ [ ~A ]_ t = 2.303 0.02232 100 25 t=62.12

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