Question
Question: <img src="https://cdn.pureessence.tech/canvas_195.png?top_left_x=1190&top_left_y=1376&width=300&heig...
Attainment of the equilibrium A(g) 
2C(g) + B(g) gave the following graph. Find the correct option.
(% dissociation = fraction dissociated × 100)
A
At t = 5 sec equilibrium has been reached and Kc = 128 (mol/litre)2
B
At t = 5 sec equilibrium has been reached and % dissociation of A is 60%
C
At t = 5 sec equilibrium has been reached and % dissociation of A is 40%
D
None of these
Answer
At t = 5 sec equilibrium has been reached and % dissociation of A is 60%
Explanation
Solution
Kp = 0.800 atm 
maximum pressure of CO2 in the container to calculate maximum volume of container the 
0.8 atm and none of CO2 should get converted into CaCO3(s).
so V(0.800 atm) = (10 L) (0.2 atm)
so v = 2.5 L