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COMEDK2024ChemistryChemical Kinetics

A substance X decomposes in solution following the first order kinetics. Flask I contains 1 L of 1 M solution of X and flask II contain 100 mL of 0.6 M solution. After 8 hours, the concentration, of X in flask I becomes 0.25 M . The time required for concentration to become 0.3 M in flask II is .........

Options

  1. A6 hrs
  2. B5 hrs
  3. C4 hrs
  4. D2 hrs

Correct answer

C. 4 hrs

Step-by-step solution

Flask I t_ 1 / 2 =4 hrs . Flask II A first order reaction is independent of the initial concentration of the reactant. Hence, the time required is 4 hours.

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