Question

Which of the following statements is correct for an electrolytic solution upon dilution?

• A. The conductivity increases upon dilution.
• B. The conductance decreases upon dilution.
• C. The molar conductance decreases, but equivalent conductance increases upon dilution.
• D. The molar conductance increases, while equivalent conductance decreases upon dilution.

Answer 1

Answer: (B)

The conductance decreases upon dilution.

When an electrolyte solution is diluted, it's concentration decreases. Due to this, the conductance increases and the conductivity decreases.

The conductance depends on the number of current-carrying ions in the solution and the conductivity depends on the number of ions per unit volume of the solution.

Due to dilution, the degree of dissociation and the number of ions increases but the number of ions per unit volume decreases.

Hence, option B is correct.