
Interpretation: The term equilibrium needs to be explained.
Concept introduction: The

Explanation of Solution
When a double arrow is placed between reactant and product, the chemical equation is represented as follows:
Here, A and B react to form AB and AB can further dissociate to form A and B.
Thus, the reaction is reversible in nature.
For a reversible reaction, equilibrium is a state when both reactants and products have equal concentrations and it does not change with time.
An equilibrium reaction is represented as follows:
At equilibrium, the change in the concentration of A, B is same as change in concentration of AB. For example, if concentration of A and B decreases by x value, the concentration of AB will increase by x .
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