⚗️ Chemical Engineering Solved MCQs with Answers

Practice 1920 approved ⚗️ Chemical Engineering questions with verified answers from the 🛠️ Engineering Essentials subject for Pakistan exams.

1920 solved MCQs

Polymerisation of poly functional monomers produces polymers havingAnswer: good machanical strength Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature.Answer: Polyacrylonitrile Thermocole is a spongy, porous, rigid or flexible foamed plastic, obtained by blowing gas/air through moltenAnswer: Either (b) or (c) Styrene butadiene rubber (SBR) isAnswer: A synthetic polymer. Polycaprolactum isAnswer: Nylon-6 Dacron is aAnswer: None of these Dacron is aAnswer: None of these Polymethyl methacrylate (PMMA) which is also known as perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer.Answer: Thermosetting __________ of SBR is adversely affected, if more quantity of styrene is added to butadiene during its co-polymerisation to produce SBR.Answer: Resilience Rexin (also called artificial leather), which is used for making table cover, automobile seat cover, shoes etc. is made by coating thick cloth with moltenAnswer: PVC The starting material used for the manufacture of caprolactum isAnswer: Cyclohexane Nylon 6, 10 which is used for bristles making is superior to nylon 6, 6 due to its lower water absorption capacity, is a/anAnswer: Polyamide Styrene which is a monomer for the production of polystyrene, is commercially produced by theAnswer: Catalytic dehydrogenation of ethyl benzene. Branched chain polymers compared to linear polymers have higherAnswer: Degree of irregularity in atomic packing. Styrene butadiene rubber is commercially manufactured byAnswer: Emulsion polymerisation __________ polythene is most prone to stress-crackingAnswer: High density Acrylonitrile is mainly used in the __________ industry.Answer: Polymer Collapsible tubes for tooth paste are produced by __________ extrusion.Answer: Impact Which of the following is not an elastomer ?Answer: None of these Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemicallyAnswer: Polymethyl methacrylate (PMMA). __________ is a copolymer.Answer: Styrene butadiene rubber (SBR) Polyvinyl chloride (PVC)Answer: Uses either emulsion or suspension polymerisation methods. Which of the following is not a condensation polymer ?Answer: Polymethylmethacrylate (PMMA) Pickout the wrong statement.Answer: Polymers made of only one monomer is called homopolymer. The only natural thermoplastic resin, which is a product of animal life isAnswer: Shellac Silicone is a/anAnswer: Inorganic polymer Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation ?Answer: PVC Polymers areAnswer: Macromolecules __________ practically possess no elasticity.Answer: Vulcanite or ebonite Phenol formaldehydeAnswer: Employs condensation polymerisation.