A plastic which cannot be softened by heat is described as
-
thermosetting
- non-biodegradable
- thermoplastic
- malleable
The correct answer is: A
Explanation
There are basically two categories of plastics:
Thermoplastic can be deformed or bent when heated, such as PVC, nylon, and polythene. Thermoplastics can be melted and re-melted into new forms, making them often recyclable. On the other hand, Thermosetting Plastics cannot be softened again by heating once they are formed, such as Bakelite. The answer is Option A