Lakhmir Singh and Manjit Kaur Solutions for Chapter: Synthetic Fibres and Plastics, Exercise 5: Questions Based on High Order Thinking Skills (HOTS)

Which plastic is used for making electric switches?

Which plastic(write the full name) is used for making flexible water bottles? (polyvinyl chloride / Poly-Ethylene Terephthalate)

Which of the following articles made of plastics ‘can be recycled’ and which ‘cannot be recycled’? Give reasons for your choice.
Telephone instruments, Plastic toys, Cooker handles, Plastic covering on electrical wires, Electric switches, Ballpoint pens, Carry bags, Plastic bottles, Plastic chairs.
 

Out of the following materials:

Cotton, Nylon, Terylene, Wool, PET, Acrylic 

Which materials are polyesters?

Out of the following materials:

Cotton, Nylon, Terylene, Wool, PET, Acrylic 

Which material is a polyamide?

Out of the following materials:

Cotton, Nylon, Terylene, Wool, PET, Acrylic 

Which material is used as a substitute for wool?

Out of the following materials:

Cotton, Nylon, Terylene, Wool, PET, Acrylic 

Which material is used as a substitute for glass?

The synthetic fibre A is chemically a polyamide whereas the synthetic fibre B contains a large number of ester groups. Another synthetic fibre C is made of a polymer D which consists of a number of glucose units joined one after the other.
(a) Which fibre could be (i) terylene (ii) rayon, and (iii) nylon?
(b) Name the polymer D.
(c) Which fibre (A, B, or C) is prepared from a natural raw material?
(d) Which fibre (A, B or C) contains the same type of groups as those in a PET jar?