I. Plastic was invented in 1960 |
II. They are the products of polymer chemistry produced from the by- products of petroleum refining |
III. They are characterized into thermoplastics and thermosetting plastic |
A) I & II
B) II & III
C) Only III
D) All the above
Correct Answer: D
Solution :
Plastics have become an indispensable part of our daily lives. Invented in 1935, they are wonderful products of polymer chemistry produced from the by- products of petroleum refining. They are classified as into two main categoriesYou need to login to perform this action.
You will be redirected in
3 sec