Chemical Effects Of Electric Current Online Quiz

Pure water is a poor conductor of electricity, but the presence of dissolved mineral salts (ions) allows it to conduct electricity effectively.

In water electrolysis, oxygen gas is produced at the anode (positive electrode) and hydrogen at the cathode (negative electrode). This follows from oxidation-reduction principles: water molecules lose electrons at the anode to form oxygen. The '11.' prefix appears to be a question number artifact.

In electrolytic solutions, current is conducted by the movement of positively and negatively charged ions dissolved in the solvent, unlike metallic conductors where electrons carry the charge.

When water undergoes electrolysis, the electric current splits water molecules into hydrogen and oxygen gas. Hydrogen gas collects at the cathode, while oxygen gas collects at the anode.

Pure sugar (sucrose) is a covalent compound that does not dissociate into ions when dissolved in water. Since ions are required to carry an electric charge through a solution, sugar solution is a non-conductor.

During the electrolysis of water, hydrogen ions (H+) are attracted to the negative terminal (cathode), where they gain electrons to form hydrogen gas bubbles.

Chromium is used for plating because it is resistant to corrosion and has a hard, shiny surface that is resistant to scratches. It is not used primarily for cost or aesthetic reasons alone.

Tin is less reactive than iron, meaning it does not rust or corrode as easily when exposed to food acids. Electroplating iron with tin protects the iron from coming into contact with the food.

The process of using an electric current to deposit a thin layer of one metal onto the surface of another is scientifically defined as electroplating.

An electrolyte is a substance that produces an electrically conducting solution when dissolved in a polar solvent, such as water.

Electric current can produce heat (like in a heater), chemical changes (like in electrolysis), and magnetic fields (like in an electromagnet).

Distilled water is pure water and lacks the dissolved salts or ions necessary to conduct electricity, making it a poor conductor compared to solutions containing acids or salts.