Question

For the reaction, $$ H_2(g) + I_2(g) \rightleftharpoons 2HI(g) $$ Attainment of equilibrium is predicted correctly by: 

• A.
• B.
• C.
• D.

Hint:

At equilibrium, the concentrations of reactants and products become constant, and the reaction rate of the forward and reverse reactions become equal.

Answer 1

The Correct Option is C

- For the reaction at equilibrium, the concentrations of the reactants (\( H_2 \) and \( I_2 \)) decrease, and the concentration of the product (\( HI \)) increases over time.
- As the system reaches equilibrium, the concentration of the reactants will stabilize and the product concentration will also stabilize. Thus, the graph where the concentrations of \( H_2 \) and \( I_2 \) decrease and the concentration of \( HI \) increases correctly represents the attainment of equilibrium.

Final Answer: Option (3).