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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- A. rubber cement
- B. contact adhesives
- C. emulsion adhesives
- D. epoxy resins
Explanation: The correct answer is emulsion adhesives. These are often referred to as polymer dispersion adhesives and are typically based on polyvinyl…
Correct answer: emulsion adhesives- A. Rubber cements
- B. Emulsion adhesives
- C. Contact adhesives
- D. Pressure-sensitive adhesive
Explanation: Pressure-sensitive adhesives (PSAs) form a bond when light pressure is applied, and Van der Waals forces significantly contribute to their…
Correct answer: Pressure-sensitive adhesive- A. One-part adhesives
- B. Dying adhesives
- C. Multiparts adhesives
- D. Pressure-sensitive adhesives
Explanation: The correct answer is Multiparts adhesives. These adhesives are formulated by mixing two or more components, which then undergo a chemical…
Correct answer: Multiparts adhesives- A. UV light
- B. Heat
- C. An added catalyst
- D. Moisture
Explanation: Cyanoacrylates, or super glues, are known for their rapid bonding capabilities.
Correct answer: Moisture- A. Urethane-based
- B. Epoxy-based
- C. Acrylic-based
- D. Silicone-based
Explanation: Acrylic-based polymers are the correct choice for light-curing adhesives because they contain photoinitiators that react to specific…
Correct answer: Acrylic-based- A. Bonding thin materials
- B. Water-based adhesives failing in humid climates
- C. Creating stronger bonds for construction
- D. Adhering labels to beverage bottles
Explanation: The correct answer is Option B: 'Water-based adhesives failing in humid climates.' Hot melt adhesives were developed because traditional…
Correct answer: Water-based adhesives failing in humid climates- A. Polystyrene
- B. Polyvinyl Chloride
- C. Nylon
- D. Acrylic Resin
Explanation: The correct answer is Nylon. Nylon is a synthetic polymer known as a polyamide, which is formed through the condensation polymerization of…
Correct answer: Nylon228. Both PVA (Polyvinyl Acetate) and PVAc-based emulsion adhesives are primarily used for what purpose?
- A. As textile fibers
- B. As coating materials
- C. As adhesive materials
- D. As packing materials
Explanation: PVA (Polyvinyl Acetate) and PVAc-based emulsion adhesives are primarily used as adhesive materials because they effectively bond a variety…
Correct answer: As adhesive materials229. A key difference between addition and condensation polymerization is that addition polymerization:
- A. Eliminates a water molecule
- B. Involves reaction between two functional groups
- C. Does not involve the elimination of a small molecule
- D. Is generally ionic in nature
Explanation: Addition polymerization involves the joining of monomers without the formation of by-products, such as water or other small molecules.
Correct answer: Does not involve the elimination of a small molecule- A. Vat Dye - Forms a covalent bond with the fiber
- B. Mordant Dye - Uses a metal salt to form a lake
- C. Disperse Dye - Applied directly from a water solution
- D. Acid Dye - Used for dyeing cotton directly
Explanation: The correct answer is Option B: Mordant Dye - Uses a metal salt to form a lake.
Correct answer: Mordant Dye - Uses a metal salt to form a lake- A. Epoxy resin
- B. Cyanoacrylate
- C. Bakelite
- D. Ethylene-vinyl acetate
Explanation: The correct answer is Ethylene-vinyl acetate. This substance is known for its use as a hot-melt adhesive due to its thermoplastic nature…
Correct answer: Ethylene-vinyl acetate- A. Biopolymers
- B. Dimers
- C. Monomers
- D. Metamers
Explanation: Polymers are large molecules constructed by linking together many small, identical or similar molecules called monomers.
Correct answer: Monomers- A. Copolymer
- B. Styrene
- C. Homopolymer
- D. Terpolymer
Explanation: The correct answer is Terpolymer. A terpolymer is a type of copolymer that is formed when three different monomers are combined.
Correct answer: Terpolymer- A. Vinyl chloride
- B. Styrene
- C. Methyl methacrylate
- D. Hexamethylenediamine
Explanation: The correct answer is Methyl methacrylate, as it is the monomer used to create acrylic resins.
Correct answer: Methyl methacrylate- A. Dihydric alcohol and dicarboxylic aromatic acids
- B. Polyamines with aliphatic dicarboxylic acids
- C. Styrene in the presence of catalyst
- D. Epichlorohydrin with diphenylolpropane
Explanation: The correct answer is Option A: Polyester resins are synthesized by the polycondensation of dihydric alcohols and dicarboxylic aromatic…
Correct answer: Dihydric alcohol and dicarboxylic aromatic acids- A. Animal fat
- B. Starch
- C. Protein
- D. Polyester
Explanation: The correct answer is Polyester. Polyester is a synthetic polymer, meaning it is created through chemical synthesis, rather than occurring…
Correct answer: Polyester- A. Light
- B. Moisture
- C. Heat
- D. All of these
Explanation: The correct answer is All of these because one-part adhesives can be activated or cured using various external energy sources such as…
Correct answer: All of these- A. Acetic acid
- B. Hexanoic acid
- C. Decanoic acid
- D. Dodecanoicacid
Explanation: (Z)-7,8-epoxy-2-methyloctadecane is the synthetic pheromones, which attract male gypsy moth.
Correct answer: Acetic acid- A. A and C
- B. A and B
- C. B and C
- D. B and D
Explanation: Linoleic acid and arachidonic acid are polyunsaturated omega-6 fatty acid whereas palmitic acid and stearic acid are saturated fatty acids…
Correct answer: A and B- A. Nylon-6,8
- B. Dacron
- C. Teflon
- D. Nylon-6,6
Explanation: The correct answer is Dacron. Dacron, or polyethylene terephthalate (PET), is the result of a condensation reaction between terephthalic…
Correct answer: Dacron