Does this solution conduct electricity better or worse than before the water is evaporated

Answer 1

It depends on the substance dissolved in the water.

If the dissolved substance is an electrolyte, such as salt or an acid, then the solution would conduct electricity better when the water is evaporated. This is because the dissolved ions are responsible for conducting electric current in the solution, and when the water evaporates, these ions become more concentrated and available for conducting electricity.

On the other hand, if the dissolved substance is non-electrolytic, such as sugar or alcohol, then the solution would not conduct electricity before or after the water evaporates. These substances do not dissociate into ions and, therefore, cannot conduct electric current.