JEE Main 2023ChemistryChemical EquilibriumMediumMCQ

JEE Main 2023 — Chemical Equilibrium Question with Solution

JEE Main 2023 (01 Feb Shift 2)

Question

The effect of addition of helium gas to the following reaction in equilibrium state at constant volume, is :
PCI5( g)⇌PCl3( g)+Cl2( g)

Choose an option

Show full solutionCorrect option: D
Correct answer
D addition of helium will not affect the equilibrium.

Step-by-step explanation

PCI5( g)⇌PCl3( g)+Cl2( g)
In the above reaction vessel, when helium(an inert gas) is added following cases can happen for isobaric and isochoric processes respectively:

Case 1 : At constant P - volume will increase so reaction will shift in forward direction then answer will be A

Case 2 : At constant volume no change in active mass so reaction will not shift in any direction then answer will be D.

Thus, at constant volume, addition of helium will not have any impact on the equilibrium.

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About this question

This is a previous-year question from JEE Main 2023, 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.