JEE Main 2026 · ChemistryMultiple choiceSingle correctMediumCalculation

JEE Main 5 April 2026, Shift 2, Chemistry Q54

Question 54 of 75 in this shift, Chemistry question 4 of 25, Section A.

Consider the following data for the reaction

\mathrm{X_2(g)+Y_2(g)\rightleftharpoons 2XY(g)}

at 600 K. The

\Delta_r G^\ominus

(in kJ mol

^{-1}

) for the reaction is : Compound |

\Delta_f H^\ominus_{600K}

(kJ mol

^{-1}

) |

S^\ominus_{600K}

(J mol

^{-1}

^{-1}

) XY(g) | 42 | 200 X

_2

(g) | 8 | 140 Y

_2

(g) | 80 | 250

(1) $-21000$
(2) $-10$ Official answer
(3) $-1000$
(4) $-9.012$

Official answer

Option 2

NTA final key.

Chapter: Thermodynamics (Chemistry)
Topic: Gibbs Free Energy
Idea tested: Gibbs Energy Definition

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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 42 of the 174 JEE Main shifts held from 2017 to 2026.