Question

The number of correct statement/s involving equilibria in physical process from the following is
(A) Equilibrium is possible only in a closed system at a given temperature 
(B) Both the opposing processes occur at the same rate. 
(C) When equilibrium is attained at a given temperature, the value of all its parameters became equal 
(D) For dissolution of solids in liquids, the solubility is constant at a given temperature

Answer 1

Correct Answer: 3

Step 1: Evaluate Each Statement 

• (A): Equilibrium is possible only in a closed system at a given temperature. Correct—A closed system is necessary to prevent loss of matter and maintain equilibrium.
• (B): Both the opposing processes occur at the same rate. Correct—At equilibrium, the rates of forward and reverse reactions are equal.
• (C): When equilibrium is attained, the value of all parameters becomes constant. Incorrect—At equilibrium, the parameters (e.g., concentrations, pressure) remain constant but are not necessarily equal.
• (D): For dissolution of solids in liquids, the solubility is constant at a given temperature. Correct—Solubility is temperature-dependent and remains constant at a specific temperature.

Step 2: Count the Correct Statements

Correct statements: (A), (B), and (D).

Total: 3 correct statements.

Conclusion:

Final Answer: The number of correct statements is 3.