Question

Which of the following statements regarding thermoplastics and thermosetting plastics are true?

• A. Thermoplastics have the ability to withstand heat.
• B. Thermosetting plastics have the ability to withstand heat.
• C. Thermoplastics have linear molecular chains.
• D. Thermosetting plastics have cross-linked molecular chains.

Answer 1

Answer: (B), (C), (D)

The correct options are
B Thermosetting plastics have the ability to withstand heat.
C Thermoplastics have linear molecular chains.
D Thermosetting plastics have cross-linked molecular chains.

Plastics are classified into thermoplastics and thermosetting plastics depending on their ability to withstand heat.

Thermoplastics get deformed easily on heating, whereas, thermosetting plastics when moulded once, can withstand heat to a large extent. Thermoplastics have linear molecular structure and are soft, while the thermosetting plastics have cross-linked molecular structure and are hard.