In a closed system at equilibrium, which of the following statements is true?
A. The concentration of reactants is zero.
B. The rate of the forward reaction is greater than the rate of the reverse reaction.
C. The concentration of products and reactants remains constant.
D. The reaction has completely stopped.


Q2. Which of the following is a characteristic of a system at equilibrium?

A. The system is at its lowest energy state.
B. The system no longer reacts with its surroundings.
C. The system's macroscopic properties remain unchanged.
D. The system has reached maximum entropy.

Q3. According to Le Chatelier's principle, if the concentration of a reactant in a system at equilibrium is increased, what will happen to the position of equilibrium?

A. It will shift towards the products.
B. It will shift towards the reactants.
C. It will remain unchanged.
D. It will shift in a direction that reduces the change.