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ChemistryJEE Main 24 Jan 2026, Shift 2·Q5·MCQ·Moderate

Equilibrium · Equilibrium constant reaction quotient

Consider the following gaseous equilibrium in a closed container of volume “V” at T(K).

PX2(g)+QX2(g)⇌2 PQ(g)\ce{P2(g) + Q2(g) <=> 2PQ(g)}

2 moles each of PX2(g)\ce{P2(g)}, QX2(g)\ce{Q2(g)} and PQ (g) are present at equilibrium. Now one mole each of ‘PX2\ce{P2}' and ‘QX2\ce{Q2}' are added to the equilibrium keeping the temperature at T(K). The number of moles of PX2\ce{P2}, QX2\ce{Q2} and PQ at the new equilibrium, respectively, are -

  1. (1)2.67, 2.67, 2.67
  2. (2)1.21, 2.24, 1.56
  3. (3)1.66, 1.66, 1.66
  4. (4)2.56, 1.62, 2.24

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See the full 24 Jan 2026, Shift 2 paper