Rust, Corrosion and Tarnish Quiz

What chemical reaction causes rust on iron?

• Evaporation

• Oxidation

• Condensation

• Sublimation

Explain the chemical process of rust formation on metals.

• Rust is formed when iron is exposed to fire and water

• Iron oxide or rust is formed when iron or steel is exposed to oxygen and moisture.

• Rust is created when iron is mixed with salt and vinegar

• Rust is a result of iron being exposed to air and sunlight

Name two common methods for preventing rust on metal surfaces.

• Applying protective coating and galvanization

• Exposing the metal to extreme heat

• Using lemon juice and salt

• Applying water and vinegar

How does applying a protective coating prevent rust on metal?

• It speeds up the chemical reaction that causes rust

• It weakens the metal, making it more susceptible to rust

• It creates a barrier between the metal and the surrounding environment, preventing moisture and oxygen from reaching the metal surface and causing rust.

• It attracts more moisture and oxygen to the metal surface

What are the effects of corrosion on the strength of metals?

• It makes the strength of metals unpredictable.

• It increases the strength of metals.

• It weakens the strength of metals.

• It has no effect on the strength of metals.

Explain how corrosion can lead to the weakening of metal structures.

• Corrosion can lead to the weakening of metal structures by preventing any damage to the metal.

• Corrosion can lead to the weakening of metal structures by making them stronger and more durable.

• Corrosion can lead to the weakening of metal structures by causing the metal to lose its strength and integrity.

• Corrosion can lead to the weakening of metal structures by improving the overall structural integrity.

What environmental factors contribute to the rusting of iron?

• Exposure to oxygen and moisture

• Exposure to sunlight and air pollution

• High temperature and low humidity

• Contact with plastic and glass

How does moisture in the air contribute to the rusting of metal?

• Moisture in the air causes the metal to become stronger and more resistant to rust

• Moisture in the air contains oxygen and water, which react with the metal to form rust through a process called oxidation.

• Moisture in the air has no effect on the rusting of metal

• Moisture in the air evaporates quickly and prevents the formation of rust on metal

What are two effective methods for removing tarnish from metal surfaces?

• Baking soda and water, commercial metal polish

• Vinegar and salt

• Toothpaste and olive oil

• Lemon juice and sugar

Explain the process of using a metal polish to remove tarnish from silverware.

• Gently rub the tarnished areas of the silverware with a small amount of metal polish using a soft cloth in a circular motion.

• Use a rough sandpaper to remove the tarnish

• Soak the silverware in water mixed with bleach

• Scrub the silverware vigorously with a wire brush