Final answer:
Nonelectrolytes exhibit no conductivity because they do not produce ions when dissolved in water, unlike electrolytes that dissociate into ions and enable electrical conduction.
Step-by-step explanation:
The characteristic of nonelectrolytes is that they exhibit no conductivity when dissolved in water. This is because nonelectrolytes do not produce ions in solution. Substances like sugar or ethanol are examples of nonelectrolytes.
When they are dissolved in water, the molecules remain intact without releasing ions, unlike electrolytes which dissociate into ions and facilitate the conduction of electricity. Therefore, nonelectrolyte solutions, such as ethanol, cannot conduct electricity since they lack the free-moving, charged species necessary for conductivity.