Question: Which of the following statements is true about a system at equilibrium?

Options:

1. The concentrations of reactants and products are equal
2. The rate of the forward reaction equals the rate of the reverse reaction
3. No reactions occur
4. The system is at rest

Correct Answer: The rate of the forward reaction equals the rate of the reverse reaction

Solution:

At equilibrium, the rates of the forward and reverse reactions are equal, not necessarily the concentrations.