JEE Main 2016ChemistryChemical EquilibriumMediumMCQ

JEE Main 2016 — Chemical Equilibrium Question with Solution

JEE Main 2016 (03 Apr)

Question

The equilibrium constant at 298 K for a reaction A+B⇌C+D is 100. If the initial concentration of all the four species were1 M each, then the equilibrium concentration of D (in mol L-1) will be:

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Show full solutionCorrect option: A
Correct answer
A1.818

Step-by-step explanation

K at 298 K for the reaction
A+B ⇌C+D is 100.

Given: The initial concentration of all four species is 1 M.
A+B⇌C+Dt=01111at equilbrium1-x1-x1+x1+x

K=1+x 1+x1-x 1-x=100
⇒ 1+x1-x=10
⇒ x=911=0.818
⇒ D=1+x=1+0.818=1.818

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About this question

This is a previous-year question from JEE Main 2016, covering the Chemical Equilibrium 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.