JEE Main 2002

Question

Change in volume of the system does not alter which of the following equilibria? A). $	ext{N}_2(g) + 	ext{O}_2(g) ightleftharpoons 2	ext{NO}(g)$ B). $	ext{PCl}_5(g) ightleftharpoons 	ext{PCl}_3(g) + 	ext{Cl}_2(g)$ C). $	ext{N}_2(g) + 3	ext{H}_2(g) ightleftharpoons 2	ext{NH}_3(g)$ D). $	ext{SO}_2	ext{Cl}_2(g) ightleftharpoons 	ext{SO}_2(g) + 	ext{Cl}_2(g)$

Edvaya · Accepted Answer

The correct answer is $	ext{N}_2(g) + 	ext{O}_2(g) ightleftharpoons 2	ext{NO}(g)$. According to Le Chatelier's principle, a change in volume (and thus pressure) alters an equilibrium only if there is a change in the total number of gaseous moles ($\Delta n_g 
e 0$).
For the reaction $	ext{N}_2(g) + 	ext{O}_2(g) ightleftharpoons 2	ext{NO}(g)$:
$\Delta n_g = 2 - (1 + 1) = 0$.
Since the number of moles of gaseous reactants equals the number of moles of gaseous products, changing the volume has no effect on the equilibrium.

Edvaya Target

Edvaya Aspire

Take a Free Mock Test

Target Subjects

Aspire Subjects

Subject Mastery

Chemistry > Physical Chemistry > Equilibrium

Keep Practicing

Current Question

Community Stats

Track Your Progress

Edvaya Target

We Value Your Privacy