Quiz 2

• Polymers are large molecules composed of repeating monomers/small units.
• What is the main advantage of using polymers in engineering applications?

  Lightweight and high strength-to-weight ratio
• Which of the following is an example of a synthetic polymer?

  Polyethylene
• Polyethylene terephthalate (PET) is commonly used in the production of plastic bottles.
• Which polymer is commonly used for making pipes and plumbing fittings?

  Polyvinyl chloride (PVC)
• Carbohydrates are a type of organic polymer.
• Polymers have a regular and orderly arrangement of atoms.

  False
• Polyvinyl chloride (PVC) = Insulation for electrical wires

  Polyethylene = Packaging materials

  Polyurethane = Foam cushioning furniture

  Polycarbonate = Transparency and impact resistance in safety goggles
• Protein are polymers formed by the combination of amino acids
• The anode is the electrode where oxidation occurs in electrochemical cell.
• An electrochemical cell can generate electrical energy from chemical reactions.
• The cathode is the electrode where reduction occurs in an electrochemical cell.
• The weakest reducing agent listed above is

  Mn2+

  
• In the following half equation, which is the oxidizing agent?

  NO3^-

  
• The standard cell potential is temperature-dependent.
• Battery = A device that converts chemical energy into electrical energy

  Corrosion = The process of gradual deterioration of a material due to electrochemical reaction with its environment.

  Redox reaction = A reaction that involves the transfer of electrons between species.

  Voltaic cell = An electrochemical cell that generates electrical energy from spontaneous redox reactions.
• According to the following cell diagram, which chemical species undergoes reduction?

  NO3^-

  
• Redox reactions involve the transfer of electrons between species.