Free Polymers MCQs with Answers
72 Polymers MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Polymers are large molecules made from repeating monomer units joined by covalent bonds. The topic distinguishes addition polymers such as polyethylene, PVC and polystyrene from condensation polymers such as nylon and polyester, and relates chain structure to thermoplastics, thermosetting polymers, elastomers, properties, uses and environmental concerns.
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- A. Polyethylene
- B. PVC
- C. Orlon
- D. nylon 6-6
Explanation: Nylon 6,6 is a copolymer because it is formed from two different monomers, hexamethylene diamine and adipic acid.
Correct answer: nylon 6-6- A. synthetic
- B. Protein
- C. Cellulose
- D. Nylon
Explanation: Polyamides contain repeating amide links, -CONH-, in their polymer chains; the best-known synthetic polyamides are nylons.
Correct answer: Nylon- A. Boron
- B. Saffron
- C. Rayon
- D. None of these
Explanation: Rayon is a regenerated cellulose fibre made by chemically processing natural cellulose, so it is classified as a man-made or artificial…
Correct answer: Rayon- A. Cationic detergents
- B. Anionic detergents
- C. Non-ionic detergents soap
- D. All of above
Explanation: Polyethylene glycol has long chains with water-attracting ether and hydroxyl groups, so it is used to make non-ionic detergents that clean…
Correct answer: Non-ionic detergents soap- A. C12H22O11
- B. C6H10O5
- C. (C6H10O5)n
- D. C6H12O6
Explanation: Starch is a polysaccharide made from a large number of glucose units joined by condensation reactions, so its general formula is…
Correct answer: (C6H10O5)n- A. oxidation
- B. elimination
- C. condensation polymerization
- D. additional polymertization
Explanation: Phenol and formaldehyde join by eliminating small molecules such as water while forming a cross-linked resin, so Bakelite is produced by…
Correct answer: condensation polymerization- A. I2
- B. Br2
- C. Cl2
- D. F2
Explanation: Teflon is polytetrafluoroethylene, formed from tetrafluoroethene and containing fluorine atoms attached to the carbon chain.
Correct answer: F2- A. Nylon 66
- B. urotropine
- C. Aniline formaldehyde plastic
- D. Bakelite
Explanation: Phenol and formaldehyde undergo acid-catalysed condensation, forming phenol-formaldehyde resin, commonly called Bakelite after curing.
Correct answer: Bakelite- A. 36%
- B. 46%
- C. 56%
- D. 66%
Explanation: Urea has formula CO(NH2)2, so its molar mass is 12 + 16 + 2(14) + 4(1) = 60 g mol^-1.
Correct answer: 46%- A. CH4 N2 and CO2
- B. H2 N2 and CO
- C. H2 CO2 and H2O
- D. H2O N2 and H2
Explanation: Industrial urea is manufactured from ammonia and carbon dioxide: 2NH3 + CO2 produces CO(NH2)2 + H2O.
Correct answer: CH4 N2 and CO2- A. 4
- B. 3
- C. 2
- D. 5
Explanation: In a cement rotary kiln, the charge passes through four functional zones: drying or preheating, calcination, burning or clinkering, and…
Correct answer: 4- A. dry process
- B. wet process
- C. both
- D. none
Explanation: Cement can be manufactured by either the dry process, in which dry raw materials are ground and fed to the kiln, or the wet process, in…
Correct answer: both- A. lime stone
- B. marble
- C. chalk
- D. all of the above
Explanation: Calcareous materials are rich in calcium carbonate, CaCO3. Limestone, marble and chalk all contain mainly calcium carbonate, although…
Correct answer: all of the above- A. prilling
- B. evaporation
- C. condensation
- D. crystallization
Explanation: In a prilling tower, molten urea is sprayed from the top and cooled by an upward air current.
Correct answer: prilling- A. straight
- B. compound
- C. both a and b
- D. none of the above
Explanation: A straight fertilizer supplies mainly one primary plant nutrient, such as nitrogen, phosphorus or potassium.
Correct answer: straight- A. Rotation of the crops
- B. Adding lime to the acid salts
- C. Adding manure and growing legumes
- D. All
Explanation: Crop rotation prevents continuous depletion of the same nutrients, lime neutralizes acidic soil, and manure adds organic matter and…
Correct answer: All- A. Acrylic acid
- B. Epichlorohydrin
- C. Vinyl chloride
- D. Adipic acid with hexamethylene diamine
Explanation: Nylon-6,6 is made by condensation polymerization of adipic acid with hexamethylene diamine, producing polyamide chains and water.
Correct answer: Adipic acid with hexamethylene diamine- A. Dihydric alcohol and dicarboxylic aromatic acids
- B. Polyamines with aliphatic dicarboxylic acids
- C. Styrene in the presence of catalyst
- D. Epichlorohydrin with diphenylol propane
Explanation: Polyester resins form by condensation between a dihydric alcohol and a dicarboxylic acid, commonly an aromatic acid, producing ester…
Correct answer: Dihydric alcohol and dicarboxylic aromatic acids- A. Copolymer
- B. Terpolymer
- C. Homopolymer
- D. Biopolymer
Explanation: A terpolymer is formed when three different monomers are incorporated into one polymer.
Correct answer: Terpolymer- A. Strecker
- B. Sabatier
- C. Runge
- D. W. H. Carothers
Explanation: W. H. Carothers classified polymerization into addition polymerization and condensation polymerization, based on how monomers join and…
Correct answer: W. H. Carothers