5 ***** of PCl5 are heated in a closed vessel of 5 litre capacity. At equilibrium 40% of PCl5 is found to be dissociated. What is the value of Kc?
a. 0.266 M
b. 0.133 M
c. 2.5 M
d. 0.20 M
Correct option (a) 0.266 M
Explanation: