Free Chemical Process Principles MCQs with Answers
2,710 Chemical Process Principles MCQs from Chemical Engineering, each with the correct answer and a written explanation of why it is correct. Free and unlimited, with no account needed.
Last updated
2,710 questions · page 55 of 136
- A. Nylon
- B. Dacron
- C. Rayon
- D. Orion
Explanation: Nylon fibres are polyamides because their chains contain repeating amide linkages, formed from diamines and dicarboxylic acids or related…
Correct answer: Nylon- A. Thiokol (a polysulphide rubber)
- B. Neoprene
- C. Butyl rubber
- D. Polyurethane rubber
Explanation: Polymerisation of chloroprene, 2-chloro-1,3-butadiene, produces neoprene.
Correct answer: Neoprene- A. Engineering plastic
- B. Polyamide fibre
- C. Polysulphide rubber
- D. Expanded polystyrene
Explanation: Thiokol is the trade name for polysulfide rubber, produced from compounds containing sulfur linkages in the polymer chain.
Correct answer: Polysulphide rubber- A. Glycerol
- B. Nitro cellulose
- C. None of these
- D. Camphor
Explanation: Celluloid is cellulose nitrate plasticised with camphor, which reduces intermolecular attraction and suppresses crystallisation, making…
Correct answer: Camphor- A. Synthetic rubber
- B. Monomer
- C. Polyester
- D. None of these
Explanation: Neoprene is the synthetic rubber obtained by polymerising chloroprene. It is therefore a rubber polymer rather than a monomer or polyester.
Correct answer: Synthetic rubber- A. Low viscosity
- B. Good mechanical strength
- C. Low melting point
- D. None of these
Explanation: Polyfunctional monomers form branched or cross-linked polymer networks, which restrict chain movement and give high rigidity and…
Correct answer: Good mechanical strength- A. Protein
- B. Starch
- C. Cellulose
- D. None of these
Explanation: β-glucose units join through β-1,4-glycosidic bonds to form cellulose, whose straight chains provide structural strength in plant cell…
Correct answer: Cellulose- A. Percent elongation
- B. Strength
- C. Freezing point
- D. Resilience
Explanation: Increasing the styrene content of SBR makes it harder and stronger but reduces its resilience, or ability to recover after deformation.
Correct answer: Resilience- A. Bakelite
- B. Neoprene
- C. Nylon-66
- D. Terylene
Explanation: Neoprene is formed by polymerising only chloroprene, so it is a homopolymer.
Correct answer: Neoprene- A. Dyeing
- B. Printing
- C. Polymer
- D. Photographic
Explanation: Acrylonitrile is an important monomer for producing acrylic fibres, ABS, and nitrile rubber, so its main industrial connection is the…
Correct answer: Polymer- A. Monomer
- B. A natural polymer
- C. Thermoplastic material
- D. Inorganic polymer
Explanation: Silicones have an inorganic siloxane backbone made of alternating silicon and oxygen atoms, although organic groups are attached to…
Correct answer: Inorganic polymer- A. Siloxane elastomers
- B. Urea-formaldehyde resins
- C. Vinyl polymers
- D. Polyamides
Explanation: Urea-formaldehyde resin is produced by step-growth condensation between urea and formaldehyde, not by the initiation, propagation, and…
Correct answer: Urea-formaldehyde resins- A. Bakelite
- B. Unsaturated polyester
- C. Isoprene
- D. Saturated polyester
Explanation: Saturated polyesters such as polyethylene terephthalate can be drawn and oriented into strong fibres.
Correct answer: Saturated polyester- A. Both A. & B.
- B. A polyester
- C. Same as Dacron
- D. Neither A. nor B.
Explanation: Terylene and Dacron are trade names for the same polyester fibre, polyethylene terephthalate. Thus both statements A and B are true.
Correct answer: Both A. & B.- A. Bakelite
- B. Teflon
- C. Polythene
- D. PVC
Explanation: Polythene, or polyethylene, is produced from inexpensive ethylene by a large-scale process and is generally regarded as the lowest-cost…
Correct answer: Polythene- A. Glass reinforced plastics
- B. Decorative laminates
- C. Electrical insulation
- D. Decorative paint
Explanation: Bakelite is mainly used in moulded articles, decorative laminates, electrical insulation, and reinforced plastics, but it is not suitable…
Correct answer: Decorative paint- A. Nylon-6
- B. Nylon-66
- C. Dacron
- D. Rayon
Explanation: Polycaprolactam is formed by ring-opening polymerisation of caprolactam and is known as Nylon-6.
Correct answer: Nylon-6- A. Density
- B. Tensile strength
- C. Degree of irregularity in atomic packing
- D. Melting point
Explanation: Branches prevent polymer chains from packing closely and regularly, so branched polymers have a higher degree of irregularity in atomic…
Correct answer: Degree of irregularity in atomic packing- A. Is produced by Polycondensation reaction
- B. Softening temperature is 200°C
- C. Can be made thermosetting by adding a plasticiser
- D. Uses either emulsion or suspension polymerisation methods
Explanation: PVC is an addition polymer commonly manufactured by suspension or emulsion polymerisation.
Correct answer: Uses either emulsion or suspension polymerisation methods- A. Automobile cushion
- B. Thermal insulation in refrigerator
- C. Coating and adhesive
- D. Fibre reinforced plastic (FRP)
Explanation: Polyurethane is widely used for automobile cushions, refrigerator insulation, coatings, and adhesives.
Correct answer: Fibre reinforced plastic (FRP)