Question 301990ChemistryWAEC

Which of the following statements is/are correct about equilibrium? I. Chemical equilibrium is attained when the rates of forward and backward reactions are equal. II. Changes in concentrations of reactants will alter equilibrium concentrations. 76 III. A catalyst alters equally the rates of both the forward and the backward reactions IV. Temperature affects equilibrium concentrations.

A

IV only

B

I & II

C

III & IV

D

I, II, III & IV

Step-by-Step Explanation

Chemical equilibrium occurs when the rates of the forward and reverse reactions are equal, resulting in constant concentrations of reactants and products. Changes in the concentrations of reactants or products can shift the equilibrium position, while a catalyst speeds up both reactions equally without affecting the equilibrium position. Additionally, temperature changes can influence the equilibrium concentrations by favoring either the exothermic or endothermic direction of the reaction.

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