Question

Which of the following statements correctly describes any chemical reaction that has reached equilibrium?(A) The concentration of products equals the concentration of reactants.(B) The rate of the forward reaction equals the rate of the reverse reaction.(C) Both forward and reverse reactions have halted.(D) The reaction is now irreversible.(E) No reactants remain.

Answer 1

Answer: B. The rate of the forward reaction equals the rate of the reverse reaction

Explanation:

Answer 2

Answer: Option (B) is the correct answer.

Explanation:

An equilibrium reaction is defined as the reaction in which the rate of forward reaction is equal to the rate of backward reaction.

For example, $N_{2}(g) + 3H_{3}(g) \rightleftharpoons 2NH_{3}(g)$

Whereas if a chemical reaction does not have rate of forward reaction equal to the rate of backward reaction then it is not known as an equilibrium reaction.

For example, $NaOH + HCl \rightarrow NaCl + H_{2}O$ is not an equilibrium reaction.

Thus, we can conclude that the statement rate of the forward reaction equals the rate of the reverse reaction, correctly describes any chemical reaction that has reached equilibrium.