Can sucrose conduct electricity as a solid or in-solution?
Sucrose can not conduct significant electric currents in either solid form or in solution in water, because sucrose does not contain ions in its solid form and does not ionize when it dissolves in water.
Potassium Bromide or KBr is not able to conduct electricity in solid state. It is an ionic compound and its ions are not free to move in the solid state, hence they are not able to conduct electricity. But when they are in aqueous state, they are free to move and thus become able to conduct electricity.
Most ionic solids cannot conduct electricity in the solid phase. They only do so in the liquid phase. While they are solid, the ions in the ionic solid are fixed in their lattice so cannot move to conduct electricity whereas in the liquid phase, the ions are free and mobile and can act as charge carriers for electricity.
An ionic compound cannot conduct electricity only in solid state. It is so because conduction in an ionic compound is due to movement of ions. In the solid state the ions are unable to move, so they can't conduct electricity but in molten state they are free and hence conduct electricity in that state.
Molten and Aqueous Sodium Chloride conduct electricity because the ions are free to move where as is a solid they have no free room. This is the same for magnesium chloride. In aluminum chloride and phosphorus chloride the solid doesn't conduct electricity because the ions aren't free to move. In liquid form they have converted into a covalent form, and so don't conduct either. All of the other chloride don't conduct electricity because they have…