Free Industrial Chemistry MCQs with Answers
292 Industrial Chemistry MCQs from Chemistry, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Industrial chemistry applies chemical reactions and material properties to the manufacture of adhesives, dyes and polymers. Coverage includes addition and condensation polymerisation, thermoplastics and thermosetting polymers, the structural basis of colour in dyes, and how adhesive composition enables bonding between surfaces.
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Read the Industrial Chemistry notesFree MDCAT chapter notes with key terms292 questions · page 2 of 15
- A. Homopolymer
- B. Thermosetting polymer
- C. Thermoplastic polymer
- D. Copolymer
Explanation: This is the option marked correct in the official UHS answer key. PVC softens on heating and can be remoulded repeatedly because its…
Correct answer: Thermoplastic polymer- A. Triggers hydration
- B. Triggers hydrolysis
- C. Prevents rapid hardening
- D. all of the above
Explanation: About 2% gypsum is added to cement to react with the highly reactive aluminate component and control the setting time, thereby preventing…
Correct answer: Prevents rapid hardening- A. As water purifier
- B. As mordant
- C. fire proofing fabrics
- D. Softening of hard water
Explanation: Alum acts as a mordant because it forms an insoluble complex with the dye and fibre, helping the colour adhere permanently to cloth.
Correct answer: As mordant- A. Mordent dye
- B. Vat dye
- C. Acid dye
- D. Direct dye
Explanation: Direct dyes are useful for fibres such as cellulose because their molecules can form hydrogen bonds with hydroxyl groups in the fibre.
Correct answer: Direct dye- A. Vinyl Chloride
- B. Vinyl acetate
- C. Formaldehyde
- D. Methyl methacrylate
Explanation: Polyvinyl acetate is formed by addition polymerisation of vinyl acetate, CH2=CH-OCOCH3, with the double bond opening to make the polymer…
Correct answer: Vinyl acetate- A. Natural rubber
- B. Vulcanized rubber
- C. synthetic rubber
- D. All of the above
Explanation: Neoprene is polychloroprene, a man-made elastomer produced by polymerising chloroprene, so it is a synthetic rubber.
Correct answer: synthetic rubber- A. Nylon
- B. Polyester
- C. bakelite
- D. PVC
Explanation: Bakelite is a thermosetting phenol-formaldehyde polymer with extensive cross-links between its chains.
Correct answer: bakelite- A. High density polythene
- B. Low density polythene
- C. PVC
- D. both A and C
Explanation: High-density polythene has relatively unbranched, linear chains, and PVC is also generally classified as a linear addition polymer.
Correct answer: both A and C- A. Natural polymers
- B. semisynthetic polymers
- C. Synthetic polymers
- D. None of These
Explanation: Vulcanized rubber is natural rubber chemically modified by heating it with sulphur, which creates cross-links between polyisoprene chains.
Correct answer: semisynthetic polymers- A. Natural rubber
- B. Synthetic rubber
- C. nylon 6-6
- D. Polystyrene
Explanation: Hexamethylene diamine reacts with adipic acid by condensation polymerisation, forming amide links and eliminating water.
Correct answer: nylon 6-6- 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