31. Ostwald’s dilution law helps to calculate:

• A) pH of strong acids
• B) Dissociation constant of weak electrolytes
• C) The solubility of strong electrolytes
• D) The strength of strong acids
• Answer: B

32. The conductivity of a solution decreases as the concentration of ions:

• A) Increases
• B) Decreases
• C) Remains constant
• D) Changes randomly
• Answer: B

33. Which of the following is true about strong electrolytes?

• A) They dissociate completely in water
• B) They partially dissociate in water
• C) They do not dissociate in water
• D) They cannot conduct electricity
• Answer: A

34. The molar conductivity of a solution at infinite dilution is:

• A) Maximum
• B) Minimum
• C) Zero
• D) Independent of dilution
• Answer: A

35. Arrhenius acids release which ion when dissolved in water?

• A) OH⁻
• B) H⁺
• C) Na⁺
• D) Cl⁻
• Answer: B

36. The unit of molar conductivity is:

• A) S cm² mol⁻¹
• B) S cm mol⁻¹
• C) Ohm m² mol⁻¹
• D) Farad mol⁻¹
• Answer: A

37. Which of the following statements is true about weak electrolytes?

• A) They fully dissociate in solution
• B) They are strong conductors of electricity
• C) They dissociate partially in water
• D) They do not dissociate at all
• Answer: C

38. In Arrhenius theory, which of the following is classified as a base?

• A) H₂SO₄
• B) HCl
• C) NaOH
• D) CH₃COOH
• Answer: C

39. Which of the following affects the conductivity of an electrolyte solution?

• A) Ion concentration
• B) Temperature
• C) Nature of the electrolyte
• D) All of the above
• Answer: D

40. The degree of dissociation (α) for a weak electrolyte increases with:

• A) Increased concentration
• B) Increased dilution
• C) Increased temperature
• D) Increased pressure
• Answer: B