Dynamic Nature of Equilibrium — Prelims Questions

Which of the following statements correctly describes a system at dynamic equilibrium?

Consider the reversible reaction $A(g) + B(g) \rightleftharpoons C(g)$. Which graph best represents the change in reaction rates over time as the system approaches dynamic equilibrium, starting with only A and B?

Which of the following physical processes can attain dynamic equilibrium in a closed system?

At dynamic equilibrium, which of the following macroscopic properties remains constant?

A catalyst is added to a system at dynamic equilibrium. What will be the effect?

Which of the following scenarios represents a dynamic equilibrium?