JEE Main Chemistry question
A gaseous phase reaction is allowed to attain equilibrium as A(g)⇌B(g)+C(g) at constant pressure P. The partial pressure of A at equilibrium is P/2. The value of equilibrium constant Kp is:
Answer: (D)
Solution
Mole fraction A=½ → α=1/3; mole fractions B=C=1/4. Kp=(P/4)²/(P/2)=P/8.