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.
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- A. 10
- B. 20
- C. 50
- D. 85
Explanation: Bamboo fibre typically contains about 40 to 60% cellulose, making 50% the closest listed value.
Correct answer: 50- A. Terylene
- B. Polybutadiene
- C. PVC
- D. Polypropylene
Explanation: Terylene is a polyester formed by step-growth condensation of ethylene glycol and terephthalic acid or a related ester, with elimination…
Correct answer: Terylene- A. PTFE
- B. Buna-S
- C. PMMA
- D. Polycaprolactam
Explanation: Buna-S is formed from two monomers, butadiene and styrene, so it is a copolymer.
Correct answer: Buna-S- A. Chain length
- B. Intermolecular forces
- C. None of these
- D. Both A. and B.
Explanation: Increasing chain length changes molecular weight and entanglement, while intermolecular forces affect strength, flexibility and softening…
Correct answer: Both A. and B.- A. Adipic acid and Hexamethylene diamine
- B. Caprolactam
- C. Maleic anhydride and Hexamethylene diamine
- D. Dimethyl terephthalate (DMT) and ethylene glycol
Explanation: Nylon-66 is the condensation product of adipic acid and hexamethylene diamine, producing amide linkages and water.
Correct answer: Adipic acid and Hexamethylene diamine- A. Dacron
- B. Bakelite
- C. Teflon
- D. Celluloid
Explanation: PTFE is the polymer of tetrafluoroethylene and is marketed under the trade name Teflon.
Correct answer: Teflon- A. 0.38
- B. 0.56
- C. 0.81
- D. 0.91
Explanation: Low-density polyethylene normally has a density of about 0.91 to 0.93 g/cm³ because its branched chains pack less efficiently.
Correct answer: 0.91- A. Detergent solution washing
- B. Dyeing/colouring
- C. Improving the stretchability
- D. Glycol soaking
Explanation: Scouring removes oils, waxes, dirt and other impurities from fibres by washing them with a detergent or alkaline solution.
Correct answer: Detergent solution washing- A. Fibres
- B. Moulded articles
- C. Adhesives
- D. All A., B. & C.
Explanation: Polyvinyl acetate is widely used in adhesives and coatings, but its low softening temperature and limited thermal stability make it…
Correct answer: Moulded articles- A. Soluble in all organic solvents
- B. Formed by addition polymerisation only
- C. More brittle
- D. Easily reshaped & reused
Explanation: Thermosetting polymers form a permanent three-dimensional cross-linked network during curing, so they cannot be melted and reshaped like…
Correct answer: More brittle- A. Perspex
- B. Lucite
- C. Plexiglass
- D. Teflon
Explanation: Perspex, Lucite and Plexiglas are trade names for PMMA. Teflon is the commercial name associated with polytetrafluoroethylene, or PTFE…
Correct answer: Teflon- A. Viscose rayon
- B. Saturated polyester
- C. Polyvinyl acetate
- D. Acrylic
Explanation: Viscose rayon, acrylic polymers and some polyvinyl acetate fibres can be produced by wet spinning through a coagulation bath.
Correct answer: Saturated polyester- A. Electrical insulation purpose
- B. Tanning of leather
- C. Strengthening of plaster of Paris
- D. Decorative laminates
Explanation: Melamine-formaldehyde resin is used for electrical insulation, decorative laminates and some leather-finishing applications because of its…
Correct answer: Strengthening of plaster of Paris- A. Densities
- B. Melting point
- C. Tensile strength
- D. Hardness, rigidity & brittleness
Explanation: Branching and cross-linking restrict polymer-chain movement, increasing hardness and rigidity while reducing flexibility.
Correct answer: Hardness, rigidity & brittleness- A. Aluminium triethyl activated with TiCl4
- B. Platinum
- C. Molybdenum
- D. Nickel
Explanation: The Ziegler catalyst system combines titanium tetrachloride with an organoaluminium compound such as triethylaluminium.
Correct answer: Aluminium triethyl activated with TiCl4- A. 7 kgf/cm2 and 700°C
- B. 1000 kgf/cm2 and 100°C
- C. 7 kgf/cm2 and 70 °C
- D. 1 kgf/cm2 (gage) and 70°C
Explanation: Low-pressure Ziegler polymerisation commonly operates near 7 kgf/cm² and 70 °C in a hydrocarbon solvent.
Correct answer: 7 kgf/cm2 and 70 °C- A. Having high flexural strength
- B. Exemplified by protein derivatives
- C. Thermosetting material
- D. Having very high tensile strength and heat resistance
Explanation: Elastomers are rubber-like polymers that can undergo substantial reversible deformation; in this list, high flexural strength is the…
Correct answer: Having high flexural strength- A. Polyolefins
- B. Polyamide
- C. Polyacrylate
- D. Polyurethane
Explanation: Nylons contain repeating amide linkages, so their generic chemical class is polyamides.
Correct answer: Polyamide- A. In making PVC
- B. For making nylon-6
- C. In insecticides manufacture
- D. As plasticisers
Explanation: Phthalic anhydride is mainly used to manufacture phthalate plasticisers, such as dioctyl phthalate, which are added to polymers to…
Correct answer: As plasticisers- A. Polyvinyl butyral
- B. Polyvinyl acetate
- C. Polyvinyl alcohol
- D. PVC
Explanation: Polyvinyl butyral forms the tough, transparent interlayer in laminated safety glass and holds glass fragments together after breakage.
Correct answer: Polyvinyl butyral