Here below some basic MCQ’s about “Polymers and polymerization” with answer which is explained in details. Let’s check one by one which is given below.
1. Which of the following is an example of a natural polymer?
- a) Polyethylene
- b) Nylon-6,6
- c) DNA
- d) Polystyrene
Answer: c) DNA
Explanation: DNA is a natural polymer made up of nucleotide monomers. Polyethylene and polystyrene are synthetic polymers, while Nylon-6,6 is an example of a synthetic polyamide.
2. Bakelite is an example of which type of polymer?
- a) Thermoplastic polymer
- b) Thermosetting polymer
- c) Elastomer
- d) Addition polymer
Answer: b) Thermosetting polymer
Explanation: Bakelite is a thermosetting polymer, which means it hardens irreversibly when heated. It cannot be remelted or reshaped after the initial setting.
3. Which of the following is an addition polymer?
- a) Teflon
- b) Nylon-6,6
- c) Polyester
- d) Bakelite
Answer: a) Teflon
Explanation: Teflon (polytetrafluoroethylene) is an addition polymer, formed by the polymerization of tetrafluoroethylene monomers without the elimination of any by-products.
4. Which of the following polymers is an example of a condensation polymer?
- a) Polyvinyl chloride (PVC)
- b) Teflon
- c) Nylon-6,6
- d) Polyethylene
Answer: c) Nylon-6,6
Explanation: Nylon-6,6 is a condensation polymer formed by the reaction of hexamethylene diamine and adipic acid, where a molecule of water is eliminated during the polymerization process.
5. The process by which monomers add together to form a polymer without the elimination of any by-products is called:
- a) Condensation polymerization
- b) Addition polymerization
- c) Copolymerization
- d) Cross-linking
Answer: b) Addition polymerization
Explanation: In addition polymerization, monomers combine to form a polymer without the loss of any atoms or molecules. This is typical of polymers like polyethylene and polypropylene.
6. Which of the following is a synthetic polymer?
- a) Wool
- b) Silk
- c) Polyethylene
- d) Cellulose
Answer: c) Polyethylene
Explanation: Polyethylene is a synthetic polymer made from ethylene monomers through the process of addition polymerization. Wool, silk, and cellulose are examples of natural polymers.
7. Which of the following is an elastomer?
- a) Bakelite
- b) Natural rubber
- c) PVC
- d) Polyester
Answer: b) Natural rubber
Explanation: Natural rubber is an elastomer, which means it can be stretched and will return to its original shape when the stretching force is removed. Elastomers have elasticity and flexibility.
8. In which type of polymerization are water molecules eliminated during the formation of the polymer?
- a) Addition polymerization
- b) Condensation polymerization
- c) Free radical polymerization
- d) Coordination polymerization
Answer: b) Condensation polymerization
Explanation: In condensation polymerization, monomers react together with the elimination of small molecules such as water, ammonia, or hydrogen chloride. This occurs in the synthesis of polymers like Nylon-6,6 and polyesters.
9. Which of the following polymers is used to make non-stick cookware?
- a) PVC
- b) Bakelite
- c) Teflon
- d) Polystyrene
Answer: c) Teflon
Explanation: Teflon, or polytetrafluoroethylene (PTFE), is a polymer known for its non-stick properties and is commonly used in cookware coatings.
10. Which of the following is an example of a copolymer?
- a) Nylon-6
- b) Styrene-butadiene rubber (SBR)
- c) Polyethylene
- d) Polystyrene
Answer: b) Styrene-butadiene rubber (SBR)
Explanation: A copolymer is made from two or more different monomers. Styrene-butadiene rubber (SBR) is a copolymer of styrene and butadiene, commonly used in tire manufacturing.
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