Equilibrium Question 621

Question: A quantity of PCl5 was heated in a 10 litre vessel at 250oC ; PCl5(g)PCl3(g)+Cl2(g) . At equilibrium the vessel contains 0.1 mole of PCl5,0.20 mole of PCl3 and 0.2 mole of Cl2 . The equilibrium constant of the reaction is [KCET 1993, 2001; MP PMT 2003]

Options:

A) 0.02

B) 0.05

C) 0.04

D) 0.025

Show Answer

Answer:

Correct Answer: C

Solution:

Kc=[PCl3][Cl2][PCl5]=0.210×0.210[0.1/10;]=0.04 .



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