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JEE Main 20253 AprilMorning Shift
Exam
JEE Main
Year
2025
Date
3 April
Shift
Morning Shift
Subject
Chemistry
Chapter
Chemical Equilibrium

JEE Main 2025 · 3 April · Morning Shift · Chemistry · Chemical Equilibrium

In the following system, PCl_5(~g) leftharpoons PCl_3(~g)+Cl_2(~g)...

In the following system, PCl5( g)⇌PCl3( g)+Cl2( g)\mathrm{PCl}_5(\mathrm{~g}) \rightleftharpoons \mathrm{PCl}_3(\mathrm{~g})+\mathrm{Cl}_2(\mathrm{~g}) at equilibrium, upon addition of xenon gas at constant T&p\mathrm{T} \& \mathrm{p}, the concentration of

Options

  1. APCl5\mathrm{PCl}_5 will increase
  2. BCl2\mathrm{Cl}_2 will decrease
  3. CPCl5,PCl3&Cl2\mathrm{PCl}_5, \mathrm{PCl}_3 \& \mathrm{Cl}_2 remain constant
  4. DPCl3\mathrm{PCl}_3 will increase

Correct answer

B. Cl2\mathrm{Cl}_2 will decrease

Step-by-step solution

On addition of inert gas at constant P \& T, reaction moves in the direction of greater no. of moles so it will shift in forward direction, so [PCl5]\left[\mathrm{PCl}_5\right] decrease and \left[\mathrm{PCl}_3\right] \&\left[\mathrm{Cl}_2\right] will increase.
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