If the equilibrium constant for $\mathrm{A \rightleftharpoons B + C}$ is $K_{eq}^{(1)}$ and that of $\mathrm{B + C \rightleftharpoons P}$ is $K_{eq}^{(2)}$, the equilibrium constant for $\mathrm{A \rightleftharpoons P}$ is :

Option 3: $K_{eq}^{(1)} K_{eq}^{(2)}$

JEE Main 2020 · ChemistryMultiple choiceSingle correctEasyConceptual

JEE Main 4 September 2020, Shift 2, Chemistry Q28

Question 28 of 75 in this shift, Chemistry question 3 of 25.

If the equilibrium constant for

\mathrm{A \rightleftharpoons B + C}

K_{eq}^{(1)}

and that of

\mathrm{B + C \rightleftharpoons P}

K_{eq}^{(2)}

, the equilibrium constant for

\mathrm{A \rightleftharpoons P}

is :

(1) $K_{eq}^{(1)} + K_{eq}^{(2)}$
(2) $K_{eq}^{(1)} / K_{eq}^{(2)}$
(3) $K_{eq}^{(1)} K_{eq}^{(2)}$ Official answer
(4) $K_{eq}^{(2)} - K_{eq}^{(1)}$

Official answer

Option 3

NTA final key (Sep 2020).

Chapter: Equilibrium
Topic: Chemical Equilibrium
Idea tested: Equilibrium Constant for Modified Equations

Same idea in other shifts

Asked 9× in all

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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.