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NTA Abhyas NEET2020ChemistryChemical KineticsPractice

99 % of a first order reaction was completed in 32 min. When will 99.9 % of the reaction complete?

Options

  1. A24 min
  2. B8 min
  3. C4 min
  4. D48 min

Correct answer

D. 48 min

Step-by-step solution

k = 2.303 32 log ⁡ 100 1 ∴ t = 2.303 2.303 32 log ⁡ 100 log ⁡ 100 0.1 t = 48 m i n

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