13.
Plastics are the materials obtained by mixing the __________ with the other ingredients which impart special engineering properties.
Answer : B. Resin
14.
Plastic resin is used in the paint industry as ________
Answer : A. Ion exchanger
15.
Thermo setting plastics are formed by_________
Answer : C. Step polymerisation
16.
Which of the following is the example of the syndiotactic polymers?
Answer : B. Gutta percha
17.
Which of the following increases the flexibility of the polymer?
Answer : C. Plasticizers
18.
Plasticizers ___________ the strength of the plastic
Answer : B. Decrease
