Which of the following cannot be dissolved in alcohol?
Plastics that can be heated and reshaped are known as:
Thermoplastic can be moulded to the desired shape again and again where thermosetting plastics will not change its shape on heating.
Which of the following plastics do not have cross-links between their polymer chains?
A. Nylon B. Melamine C. Terylene D. Bakelite
(a) A and B (b) B and C (c) A and C (d) C and D
Which of the following plastic objects can be recycled ?
A. Electric socket B. Polythene bag C. PVC pipe D. Ashtray
(a) A and B (b) B and C (c) A and D (d) C and D
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