Question 1: Describe two common everyday items that are made from polymers. Explain why polymers are suitable for these items.

Answer: Common items include plastic bottles and food containers. Polymers are suitable because they are lightweight, durable, and resistant to corrosion.

Question 2: Identify whether the following statement is true or false: 'Polymers can be natural or synthetic.'

Answer: True

Question 3: List three properties of thermoplastic polymers and explain how each property influences their use in manufacturing.

Answer: Properties include: 1) Malleability - allows shaping when heated; 2) Recyclability - can be remelted and reused; 3) Flexibility - suitable for products requiring bending or stretching.

Question 4: Design Brief: You are asked to create a lightweight, flexible storage container for school supplies. Which type of polymer would you choose and why?

Answer: A suitable choice could be a thermoplastic polymer like polypropylene because it is lightweight, flexible, and easy to mould into different shapes.

Question 5: Sketch an idea for a container made from a polymer that is both transparent and durable. Label key features of your design.

Answer: A correct sketch would show a container with a clear body, a secure lid, and handles. Labels should include 'transparent material,' 'durable walls,' and 'easy to open lid.'

Question 6: Explain the differences between thermoplastics and thermosetting plastics in terms of their structure and recyclability.

Answer: Thermoplastics have long polymer chains that can be melted and reshaped repeatedly, making them recyclable. Thermosetting plastics have cross-linked chains that prevent melting; once set, they cannot be remelted or reshaped.

Question 7: A product needs to be heat-resistant and maintain its shape at high temperatures. Would you choose a thermoplastic or a thermosetting polymer? Justify your answer.

Answer: A thermosetting polymer, because it retains its shape and resists deformation when exposed to high temperatures.

Question 8: Draw a simple cross-section of a polymer fibre used in clothing, showing the arrangement of polymer chains.

Answer: A correct sketch would show long, tangled polymer chains aligned parallel within the fibre, indicating flexibility and strength.

Question 9: What environmental concerns are associated with the use of polymers, and how can these be addressed?

Answer: Polymers contribute to plastic waste and pollution. They can be addressed through recycling, using biodegradable polymers, and reducing single-use plastics.

Question 10: Identify a polymer that is commonly used in packaging and describe its key properties that make it suitable.

Answer: Polyethylene is commonly used due to its lightweight, chemical resistance, flexibility, and low cost.