Question

Why does alcohol and glucose not conduct electricity?

Answer 1

As in the both H+ ions are not produced .for conducting electricity solution must have H+ions

Answer 2

Alcohol does not conduct electricity because it is a covalent compound .they do not have  any free electrons to move. This is because they have a stable electronic configuration. Because of this the alcohol molecules are not ionized in water because the bonding with these molecules is strong enough to resist the breaking up of the bond .

So these compound cannot be splitted into ions .

Therefore their conductivity is zero.