Which one of the following statements is incorrect about chemical equilibrium? (a) Chemical equi...

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Which one of the following statements is incorrect about chemical equilibrium?
(a) Chemical equilibrium is attained whether we start with reactants or products
(b) Chemical equilibrium is dynamic in nature
(c) Chemical equilibrium, \( \mathrm{CaCO}_{3}(s) \rightleftharpoons \mathrm{CaO}(s)+\mathrm{O}_{2}(g) \) is attained, when \( \mathrm{CaCO}_{3}(s) \) is heated in an open vessel
(d) At equilibrium, the concentration of each of the reactants and products becomes constant.
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