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 11 of 15
- A. Adipic acid
- B. Hexamethylene diamine
- C. Benzene-1,4-dicarboxylic acid
- D. Epichlorohydrin
Explanation: The correct answer is Option C:Benzene-1,4-dicarboxylic acid. Terelyne is a type of polyester formed by the reaction of ethane-1,2-diol…
Correct answer: Benzene-1,4-dicarboxylic acid- A. Two monomers each with 8 oxygen atoms
- B. Epichlorohydrin and diphenylol propane
- C. Adipic acid and hexamethylene diamine
- D. Vinyl chloride and vinyl acetate
Explanation: Nylon 6,6 is a type of polyamide and its name is derived from the two monomers used to create it: adipic acid and hexamethylene diamine.
Correct answer: Adipic acid and hexamethylene diamine- A. Polyether
- B. Polyester
- C. Polyvinyl
- D. Polyolefin
Explanation: The fundamental structure of epoxy resins is actually that of a polyether.
Correct answer: Polyether- A. Polystyrene
- B. Polyvinyl Acetate (PVA)
- C. Polyvinyl Chloride (PVC)
- D. Polyamide
Explanation: The correct answer is Polyvinyl Acetate (PVA). PVA is a colorless, non-toxic resin with a distinct odor and is primarily used as an…
Correct answer: Polyvinyl Acetate (PVA)- A. Pigment
- B. Chromogen
- C. Mordant
- D. Dye
Explanation: The correct answer is Dye because dyes are specifically designed to be soluble, allowing them to penetrate the fabric and bond with it to…
Correct answer: Dye- A. Auxochrome
- B. Chromophore
- C. Lake
- D. Chromogen
Explanation: The correct answer is Chromophore. Chromophores are the parts of a dye molecule responsible for color production.
Correct answer: Chromophore- A. -OH
- B. -NH₂
- C. -N=N-
- D. -SO₃H
Explanation: Chromophores are parts of molecules responsible for their color. The -N=N- group, known as an azo group, is a typical chromophore found in…
Correct answer: -N=N-- A. To produce the initial color
- B. To deepen or intensify the color and help it bind
- C. To make the dye insoluble in all solvents
- D. To act as a reducing agent
Explanation: An auxochrome is a functional group attached to a chromophore that modifies the ability of the chromophore to absorb light, thus altering…
Correct answer: To deepen or intensify the color and help it bind- A. Staudinger
- B. William Henry Perkin
- C. W.H. Carothers
- D. Ziegler and Natta
Explanation: William Henry Perkin discovered the first synthetic aniline dye, mauveine, in 1856 while attempting to synthesize quinine.
Correct answer: William Henry Perkin210. Alizarin, a dye derived from the madder root, is an example of which type of dye based on source?
- A. Synthetic dye
- B. Animal dye
- C. Natural dye
- D. Mineral dye
Explanation: The correct answer is Natural dye. Alizarin is extracted from the madder root, which is a plant-based source, fitting the definition of a…
Correct answer: Natural dye- A. Chromogen
- B. Lake
- C. Vat
- D. Pigment
Explanation: The correct answer is Lake. A lake is a type of dye that becomes insoluble through the formation of a complex involving a mordant, which…
Correct answer: Lake212. Which method of dyeing involves producing a water-insoluble azo dye directly on the fabric itself?
- A. Vat dyeing
- B. Direct dyeing
- C. Disperse dyeing
- D. Azotic dyeing
Explanation: The correct answer is Azotic dyeing. This process involves a chemical reaction occurring directly on the fabric to form a water-insoluble…
Correct answer: Azotic dyeing- A. Acid dyes
- B. Basic dyes
- C. Disperse dyes
- D. Vat dyes
Explanation: Disperse dyes are specifically designed for dyeing synthetic fibers such as polyester, due to their insolubility in water and ability to…
Correct answer: Disperse dyes- A. Sulphur dyes
- B. Fibre-reactive dyes
- C. Solvent dyes
- D. Basic dyes
Explanation: Fibre-reactive dyes are unique because they form covalent bonds with the substrate, which is typically cellulose fibers.
Correct answer: Fibre-reactive dyes- A. Permanent
- B. Semi-permanent
- C. Demi-permanent
- D. Temporary
Explanation: The correct answer is Temporary. Temporary hair dyes are designed to coat the surface of the hair with large pigment molecules, which do…
Correct answer: Temporary- A. It acts as the primary coloring agent
- B. It acts as the oxidizing agent
- C. It opens the hair shaft
- D. It neutralizes the dye
Explanation: In permanent hair dyeing, ammonia plays a crucial role by opening the hair shaft.
Correct answer: It opens the hair shaft- A. Acid dyes
- B. Solvent dyes
- C. Direct dyes
- D. Vat dyes
Explanation: Solvent dyes are ideal for coloring non-polar substances such as oils, waxes, and shoe polishes because they are soluble in organic…
Correct answer: Solvent dyes- A. Azo dyes
- B. Anthraquinone dyes
- C. Triarylmethane dyes
- D. Nitro dyes
Explanation: Malachite Green belongs to the triarylmethane class of dyes. These dyes are recognized by their structure consisting of three aryl groups…
Correct answer: Triarylmethane dyes- A. Reactive and Non-reactive
- B. Bold and Liquid
- C. Natural and Synthetic
- D. Drying and Curing
Explanation: Adhesives are classified based on their origin into two main categories: Natural and Synthetic.
Correct answer: Natural and Synthetic220. An adhesive that hardens simply by the evaporation of the solvent it is suspended in is known as:
- A. Reactive adhesive
- B. Pressure-sensitive adhesive
- C. Drying adhesive
- D. Hot-melt adhesive
Explanation: The correct answer is Drying adhesive. These adhesives harden through the evaporation of the solvent in which they are suspended.
Correct answer: Drying adhesive