20.5 Polymers

Which of the following polymers is formed by addition polymerisation?

A. Nylon

B. Polyethylene

C. Polyester

D. Bakelite

Which polymer is commonly used in the textile industry due to its strength and durability?

A. Polypropylene

B. PVC

C. Nylon

D. Polystyrene

Which environmental concern is primarily associated with non-biodegradable polymers?

A. Air pollution

B. Water pollution

C. Soil erosion

D. Landfill waste accumulation

Which of the following is a condensation polymer?

A. Polyethylene

B. Polypropylene

C. Nylon

D. Polybutadiene

Which polymer is commonly used in packaging due to its clarity and flexibility?

A. Polypropylene

B. PVC

C. Nylon

D. Polyester

a) Describe the mechanism of the formation of polyethylene. [3]

b) How does the structure of polyethylene differ from polypropylene? [2]

a) Explain the environmental concerns associated with the disposal of polymers. [3]

b) How can recycling help mitigate the environmental impact of polymers? [2]

a) Describe the mechanism of formation of nylon. [3]

b) Why is nylon commonly used in textiles? [2]

a) Explain the significance of polymers in biochemistry and medicine. [3]

b) Describe the properties of polyester that make it suitable for use in textiles. [2]

c) How does the structure of polyester differ from that of nylon? [3]

a) What are the environmental concerns associated with the use of non-biodegradable polymers? [3]

b) Explain the process of recycling polymers. [3]

c) How does recycling polymers contribute to sustainable development? [2]