A) CaO does not react to \[\text{C}{{\text{O}}_{\text{2}}}\] to give \[CaC{{O}_{3}}\]
B) backward reaction is very low
C) \[C{{O}_{2}}\] formed escapes out
D) one of the above
Correct Answer: C
Solution :
In the lime kiln, the \[\text{C}{{\text{O}}_{\text{2}}}\]formed during decomposition of calcium carbonate escapes out continuously. Hence, the reaction is not a reversible one and proceeds towards completion. On the other hand if the reaction takes place in a closed container where none of the reactant or product is allowed to escape then the reaction soon reaches the equilibrium state.
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