1. Which of the following is NOT a characteristic of a system at equilibrium?
  a) The rates of the forward and reverse reactions are equal.
  b) The concentrations of reactants and products remain constant.
  c) The reaction has stopped completely.
  d) The macroscopic properties of the system remain constant.

2. What does the equilibrium constant (K) represent?
  a) The rate of the forward reaction.
  b) The rate of the reverse reaction.
  c) The ratio of product concentrations to reactant concentrations at equilibrium.
  d) The activation energy of the reaction.
 

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