Question

why does aqueous solution of sugar do not conduct electricity

Answer 1

When sugar is dissolved in water, the solution does not conduct electricity, because there are no ions in the solution. Some substances that are made of molecules form solutions that do conduct electricity. Ammonia is such a substance. When ammonia dissolves in water, it reacts with the water and forms a few ions.

Answer 2

it doesn't conduct electricity because when dissolved in water it doesn't contain free ions,sugar solution contains neutral molecule of sugar and molecules are not hydrated for an electrolysis .