JEE Main 2018 — Chemical Equilibrium Question with Solution
From: JEE Main 2018 (Online) 16th April Morning Slot
Question
The gas phase reaction 2NO2(g) N2O4(g) is an exothermic reaction. The decomposition of N2O4, in equilibrium mixture of NO2(g) and N2O4(g), can be increased by :
Choose an option
Show full solutionCorrect option: D
Correct answer
Daddition of an inert gas at constant pressure.
Step-by-step explanation
2NO2 (g) N2O4 (g); H = ve
At equilibrium, N2O4 2NO2 ; H = + ve
On adding the inert gas at constant pressure, the number of moles per unit volume of various reactants and products will decrease. Hence, the equilibrium will shift towards the direction in which there is increase in number of moles of gases. Therefore, in above case, reaction will move towards forward direction which will lead to the decomposition of dinitrogen tetraoxide (N2O4).
At equilibrium, N2O4 2NO2 ; H = + ve
On adding the inert gas at constant pressure, the number of moles per unit volume of various reactants and products will decrease. Hence, the equilibrium will shift towards the direction in which there is increase in number of moles of gases. Therefore, in above case, reaction will move towards forward direction which will lead to the decomposition of dinitrogen tetraoxide (N2O4).
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This is a previous-year question from JEE Main 2018, 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.