Post-UTME Chemistry 2019 Objective — Question 9
Question 9 of 20 from the Post-UTME Screening (Post-UTME) Chemistry 2019 Objective paper, with the correct answer and a full explanation.
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A chemical reaction is said to have attained a state of chemical equilibrium when the
- A. concentrations of the reactants are equal to those of the products
- B. reagents in the system stop reacting
- C. concentrations of the products are greater than those of the reactants
- D. concentrations of the reactants and products remain constantCorrect
Explanation
At equilibrium, the forward and reverse reaction rates are equal, so the concentrations of reactants and products remain constant (though not necessarily equal).
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