When a concentrated solution of an electrolyte is dilutedits specific conductance increases.its equivalent conductivity decreases.its specific conductance decreases and equivalent conductivity increases.both specific Conductance and equivalent conductivity increase.

The statement "When a concentrated solution of an electrolyte is diluted, its specific conductance decreases and equivalent conductivity increases" is correct.

Here's why:

1. Specific Conductance: Also known as conductivity, it is the measure of the ability of a solution to conduct electricity. It depends on the concentration of the electrolyte, the nature of the solvent and the temperature. When a concentrated solution is diluted, the number of ions per unit volume decreases, leading to a decrease in specific conductance.

2. Equivalent Conductivity: This is the conductance of an electrolyte solution of one equivalent (or one mole) in a large volume V such that the volume contains only one ion pair. It is directly proportional to the volume or dilution. So, when a solution is diluted, the volume increases, leading to an increase in equivalent conductivity.

So, in summary, when a concentrated solution of an electrolyte is diluted, its specific conductance decreases due to a decrease in the number of ions per unit volume, and its equivalent conductivity increases due to an increase in volume or dilution.