JEE Main 2022 · ChemistryNumerical answerNumerical valueHardMulti-step

JEE Main 24 June 2022, Shift 2, Chemistry Q83

Question 83 of 90 in this shift, Chemistry question 23 of 30, Section B.

PCl

_5

dissociates as PCl

_5

(g)

\rightleftharpoons

PCl

_3

(g)+Cl

_2

(g) 5 moles of PCl

_5

are placed in a 200 litre vessel which contains 2 moles of N

_2

and is maintained at 600 K. The equilibrium pressure is 2.46 atm. The equilibrium constant K

_p

for the dissociation of PCl

_5

is ________

\times

^{-3}

. (nearest integer) (Given: R = 0.082 L atm K

^{-1}

mol

^{-1}

; Assume ideal gas behaviour)

Official answer

1107

NTA final key.

Chapter: Equilibrium
Topic: Chemical Equilibrium
Idea tested: Kp Expression via Partial Pressures

Same idea in other shifts

Asked 4× in all

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29 Jun 2022, Shift 2 · Q644.0 moles of argon and 5.0 moles of $\mathrm{PCl_5}$ are introduced into an evacuated flask of 100 litre capacity at 610 K. The system is…MediumSingle correct

Question text from the official JEE Main paper published by NTA; answer from the final answer key. Chapter, topic and idea tags, difficulty and skill are Lumi’s. Lumi analyses 108 of the 174 JEE Main shifts held from 2017 to 2026.