JEE Advanced · ChemistryMedium

The decomposition of in follows first order kinetics. If the initial concentration is and after it becomes , what is the rate constant in ?

  1. A.
  2. B.
  3. C.
  4. D.
Show correct answer & step-by-step solution

Correct answer: A —

Solution

  1. The concentration halves from to , so .
  2. The rate constant for a first order reaction is .
  3. .
  4. .
  5. Hence the answer is (A).

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