Thermoplastic Polymers MCQs

By: Prof. Dr. Fazal Rehman | Last updated: November 27, 2024

1. At a pressure of which of the following, LDPE is prepared by polymerising ethylene?
(A). 100-200 atmospheres
(B). 1000-5000 atmospheres
(C). 10-100 atmospheres
(D). 2-10 atmospheres
(E). None of these
Answer: B

2. Which of the following is incorrect?
(A). Inert and has excellent chemical resistance, LDPE is chemically
(B). LDPE is flexible and tough
(C). For making films in general packaging, carrier bags etc LDPE is used
(D). For load-bearing applications LDPE has high rigidity and is suitable
(E). None of these
Answer: D

3. For the manufacture of pipes for the distribution of gas, LDPE is suitable.
(A). True
(B). False
(E). None of these
Answer: B

4. In the presence of which of the following the ethylene is polymerised under?
(A). Zeigler Natta catalyst
(B). Supported metal oxide catalyst
(C). Lewis acids catalyst
(D). Friedel crafts catalyst
(E). None of these
Answer: A

5. Which of the following is the softening temperature of HDPE?
(A). 135°C
(B). 200°C
(C). 85°C
(D). 150°C
(E). None of these
Answer: A

6. To make which of the following plasticized PVC is not used?
(A). Baby-pants
(B). Bathroom curtaining
(C). Pipes for drainage
(D). Garden hose
(E). None of these
Answer: C

7. ______ is also known as Lucite.
(A). Polystyrene
(B). Polyvinyl acetate
(C). Perspex
(D). Teflon
(E). None of these
Answer: C

8. Which of the following is the crystallinity of LDPE?
(A). 55%
(B). 10%
(C). 30%
(D). 80-90%
(E). None of these
Answer: A

9. By which of the following polymerisation of styrene, Polystyrene is prepared?
(A). Condensation
(B). Free radical
(C). Anionic
(D). Cationic
(E). None of these
Answer: B

10. Polystyrene is hard but brittle due to the chain stiffening effect of a benzene ring.
(A). True
(B). False
(E). None of these
Answer: A

11. Which of the following is incorrect?
(A). PVC is odourless, colourless and non-inflammable
(B). For making bottles for consumable liquids PVC is used
(C). In ethyl chloride PVC has superior chemical resistance but is soluble
(D). PVC has poor resistance to weathering and oil resistance
(E). None of these
Answer: D

12. Which of the following is incorrect?
(A). HDPE has good electrical insulation properties
(B). From odour and toxicity, HDPE is free
(C). For domestic water and gas piping HDPE can be used
(D). Compared to LDPE, HDPE possesses a lower tensile strength
(E). None of these
Answer: D

13. Which of the following is the softening temperature of polystyrene?
(A). 80-100°C
(B). 10-20°C
(C). 30-50°C
(D). 120-150°C
(E). None of these
Answer: A

14. ______ is an application of polystyrene?
(A). For solar collectors Dome-shaped covers
(B). For talcum powder Containers
(C). For printed circuitry Laminates
(D). Insulators for motors
(E). None of these
Answer: B

15. _______ act as a catalyst in the preparation of PVC.
(A). Benzoyl peroxide
(B). Grignard reagent
(C). Potassium amide
(D). Lewis acid
(E). None of these
Answer: A

16. _____ statement is incorrect about Teflon.
(A). It is chemically and dense inert
(B). There are good electrical insulation properties
(C). There is a high density of the order 2.1 to 2.3 gm/cm³
(D). There is a high coefficient of friction
(E). None of these
Answer: D

17. PVC is a polymeric polar molecule the C-Cl dipole makes.
(A). True
(B). False
(E). None of these
Answer: A

18. _____ is not an example of thermoplastic?
(A). Vulcanised rubber
(B). Nylon
(C). PVC
(D). Polyester
(E). None of these
Answer: A

19. ______ is used for making chewing gums.
(A). Perspex
(B). Teflon
(C). Polystyrene
(D). Polyvinyl acetate
(E). None of these
Answer: D

20. _____ is an application of Teflon.
(A). Audio cassettes
(B). Combs and brush handles
(C). Optical fibres
(D). Coatings of frying pans
(E). None of these
Answer: D

21. By the process of which of the following polymerisation of ethylene, Polythene is prepared?
(A). Living
(B). Condensation
(C). Free-radical
(D). Addition
(E). None of these
Answer: D

22. Which of the following is thermoplastic?
(A). Insoluble
(B). Amorphous
(C). Cross-linked
(D). Held by a covalent bond
(E). None of these
Answer: B

 

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