Chemical Effects of Electric Current

What is electrolysis?

• Electrolysis is the process of using a magnetic field to drive a chemical reaction.

• Electrolysis is the process of using heat to drive a chemical reaction.

• Electrolysis is the process of using an electric current to drive a non-spontaneous chemical reaction.

• Electrolysis is the process of using pressure to drive a chemical reaction.

Name the process in which a metal is coated with a thin layer of another metal using electrolysis.

• Electrofusion

• Electroplating

• Metallic coating

• Electrocoating

How can corrosion be prevented in iron?

• By using a hammer to break the iron

• By applying a protective coating, using sacrificial anodes, or galvanizing the iron.

• By exposing to extreme heat

• By soaking in water for extended periods

What is the purpose of using a sacrificial anode in corrosion prevention?

• To protect the primary metal structure by corroding itself instead

• To increase the rate of corrosion on the primary metal structure

• To provide additional strength to the primary metal structure

• To attract more moisture to the primary metal structure

Explain the concept of electroplating.

• Electroplating is the process of coating a metal object with a thin layer of another metal using electricity.

• Electroplating involves heating metal objects to create a shiny surface.

• Electroplating is the process of coating a metal object with a thin layer of plastic using electricity.

• Electroplating is a method of removing metal from objects using chemicals.

What happens at the anode during electrolysis?

• Oxidation

• Evaporation

• Condensation

• Reduction

Why is it important to use a salt bridge in an electrolytic cell?

• To prevent the flow of ions between the two half-cells

• To reduce the efficiency of the electrolytic cell

• To increase the temperature of the electrolyte

• To maintain electrical neutrality and allow the flow of ions between the two half-cells.

What is the role of cathode in electrolysis?

• The cathode repels positively charged ions and is where oxidation occurs.

• The cathode attracts negatively charged ions and is where reduction occurs.

• The cathode attracts positively charged ions and is where reduction occurs.

• The cathode attracts positively charged ions and is where oxidation occurs.

How does electroplating help in enhancing the appearance of objects?

• Electroplating enhances the appearance of objects by making them more prone to rust and deterioration.

• Electroplating enhances the appearance of objects by providing a shiny, reflective, or colored finish while also preventing corrosion and wear.

• Electroplating enhances the appearance of objects by causing them to emit a foul odor.

• Electroplating enhances the appearance of objects by making them heavier and less visually appealing.

What are some common methods used for corrosion prevention?

• Protective coatings, corrosion-resistant alloys, cathodic protection, proper design

• Regular maintenance, sacrificial anodes, high humidity levels