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NTA Abhyas JEE Main2020ChemistryChemical KineticsPractice

Two substances A t 1 2 = 5 m i n and B t 1 2 = 15 m i n follow first order kinetics, are taken in such a way that initially A = 4 B . The time after which the concentration of both substances will be equal is:

Options

  1. A5 m i n .
  2. B10 m i n .
  3. C15 m i n .
  4. D20 m i n .

Correct answer

C. 15 m i n .

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