JEE Main 2026 — Chemical Kinetics Question with Solution
JEE Main 2026 (02 April Shift 2)
Question
Consider the following gas phase reaction being carried out in a closed vessel at .
The pressure of at minutes time interval would be _______ mm Hg. (nearest integer)
| time (min) | total pressure of the system (mm Hg) |
|---|---|
Enter your answer
Show full solutionCorrect answer: 20
Correct answer
20
Step-by-step explanation
For the given gas phase reaction:
Let the initial pressure of be .
At : , ,
At : , ,
Total pressure at time ,
At , the reaction is complete, so
Total pressure at ,
Given mm Hg:
mm Hg
At min, mm Hg:
mm Hg
The pressure of at minutes is mm Hg.
Answer:
Let the initial pressure of be .
At : , ,
At : , ,
Total pressure at time ,
At , the reaction is complete, so
Total pressure at ,
Given mm Hg:
mm Hg
At min, mm Hg:
mm Hg
The pressure of at minutes is mm Hg.
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.