JEE Main Chemistry question
Eight mole of a gas AB₃ attain equilibrium in a closed container of volume 1 dm³ as, 2AB₃⇌A₂(g)+3B₂(g). If at equilibrium 2 mole of A₂ are present then equilibrium constant is:
Answer: (D)
Solution
2 mol A₂ formed requires 4 mol AB₃ consumed, giving 6 mol B₂. AB₃_eq=4, A₂=2, B₂=6 (all in 1 L). Kc=[A₂][B₂]³/[AB₃]²=2×216/16=27.