JEE Main 2026 — Chemical Kinetics Question with Solution
JEE Main 2026 (04 April Shift 2)
Question
For a first order reaction
______ min. (Nearest integer)
______ min. (Nearest integer)
Enter your answer
Show full solutionCorrect answer: 7
Correct answer
7
Step-by-step explanation
For a first order reaction, the rate constant is given by:
Using the data at min:
Using the data at min:
Equating the two expressions for :
Rounding to the nearest integer, we get .
Answer:
Using the data at min:
Using the data at min:
Equating the two expressions for :
Rounding to the nearest integer, we get .
Answer:
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This is a previous-year question from JEE Main 2026, covering the Chemical Kinetics chapter of Chemistry. PrepSharp catalogues every PYQ from JEE Main with a verified answer key and step-by-step solution prepared by IIT alumni — so you can search by chapter, topic or year and revise efficiently.