Picture (1) represents an equilibrium mixture of solid CaCO3,solid CaO,and gaseous CO2,obtained as a result of the endothermic decomposition of CaCO3. 
-Which picture (2) -(4) represents the equilibrium mixture after addition of four more CO2 molecules?
A) picture (2)
B) picture (3)
C) picture (4)
D) None of these
Correct Answer:
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