JEE Main · ChemistryHard
A first order reaction is complete in minutes. How much time is required for the reaction to be complete?
- A.40 minutes
- B.60 minutes
- C.80 minutes
- D.100 minutes
Show correct answer & step-by-step solution
Correct answer: B — 60 minutes
Solution
- The half-life is minutes.
- For completion, the remaining reactant is .
- Since , the reaction requires half-lives.
- Total time minutes.
- Hence the answer is (B).
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