Aluminum foil is a metal and a good conductor of electricity, but not when in solid form. Sugar is a non-electrolyte and does not conduct electricity when dissolved in water.

Potassium hydroxide is a strong base and a good conductor of electricity when dissolved in water. When potassium hydroxide is dissolved in water, it dissociates into potassium ions (K+) and hydroxide ions (OH-). The potassium ions and hydroxide ions are free to move in the water and can carry an electric current.