JEE Main 2014ChemistryChemical KineticsEasyMCQ

JEE Main 2014 — Chemical Kinetics Question with Solution

JEE Main 2014 (09 Apr Online)

Question

The half-life period of a first-order reaction is 15 minutes. The amount of substance left after one hour will be

Choose an option

Show full solutionCorrect option: A
Correct answer
A 1 1 6 of the original amount

Step-by-step explanation

For the first-order reaction

A → Product

[A]t=[A0] 12Δtt1/2

         [A]t=A0126015=A0124

         ∴ [A]t=A016

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About this question

This is a previous-year question from JEE Main 2014, 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.