Polymer Technology — Part 1 MCQs with Explanations

Nylon-6 and Nylon-66 are both types of polyamides but differ in their molecular structure and properties. Nylon-6 is produced from a single monomer, caprolactam, whereas Nylon-66 is made from two monomers: adipic acid and hexamethylenediamine. Hardness: Nylon-66 is harder than Nylon-6 due to its higher crystallinity and symmetrical structure. So, Option A is incorrect. Abrasion Resistance: Nylon-66 has better abrasion resistance than Nylon-6 because of its denser molecular packing. Thus, Option B is also incorrect. Melting Point: Nylon-66 has a higher melting point (around 255–265°C) than Nylon-6 (around 220–230°C) because of stronger hydrogen bonding. Hence, Option C is incorrect. Conclusion: Since none of the statements are true when comparing Nylon-6 to Nylon-66, the correct answer is Option D: None of these.

Phenol & formaldehyde is the correct answer to “Condensation polymerisation of __________ produces bakelite.”. This question is standard in competitive examination syllabi for Polymer Technology.

Plexiglass or lucite is the correct answer to “Polymethyl methacrylate, which is an acrylic resin, is also called”. This question is standard in competitive examination syllabi for Polymer Technology.

Detergent solution washing is the correct answer to “Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.”. This question is standard in competitive examination syllabi for Polymer Technology.

Polythene is the correct answer to “__________ scrap can be recycled & reutilised.”. This question is standard in competitive examination syllabi for Polymer Technology.

Expanded polystyrene is the correct answer to “Lavatory cisterns are normally made of”. This question is standard in competitive examination syllabi for Polymer Technology.

Melamine resins is the correct answer to “Which of the following polymers belong to the class of formaldehyde resin”. This question is standard in competitive examination syllabi for Polymer Technology.

All of the above is the correct answer to “Dacron (or terylene) fibres as compared to nylon fibres have”. This question is standard in competitive examination syllabi for Polymer Technology.

Coating and films is the correct answer to “Maximum consumption of polymers is in”. This question is standard in competitive examination syllabi for Polymer Technology.

PVC is the correct answer to “Vinyl flooring is done using __________ sheets.”. This question is standard in competitive examination syllabi for Polymer Technology.

Buckets is the correct answer to “All thermoplastic, thermosetting & elastic materials can be processed in a extrusion machine, however it can not be used for the production of plastic”. This question is standard in competitive examination syllabi for Polymer Technology.

Wool is the correct answer to “Which of the following is a natural polyamide fibre.”. This question is standard in competitive examination syllabi for Polymer Technology.

Nylon is the correct answer to “__________ is not a polyester fibre.”. This question is standard in competitive examination syllabi for Polymer Technology.

Cyclohexane is the correct answer to “The starting material used for the manufacture of caprolactum is”. This question is standard in competitive examination syllabi for Polymer Technology.

High density is the correct answer to “__________ polythene is most prone to stress-cracking”. This question is standard in competitive examination syllabi for Polymer Technology.

Increases with increase in temperature is the correct answer to “Viscosity of a polymer solution or melt”. This question is standard in competitive examination syllabi for Polymer Technology.

Polymethylmethacrylate is the correct answer to “Contact lenses for eyes are made of perspex, which is nothing but”. This question is standard in competitive examination syllabi for Polymer Technology.

Sulphur is the correct answer to “Most commonly used rubber vulcanisation agent is”. This question is standard in competitive examination syllabi for Polymer Technology.

Polystyrene is the correct answer to “Hot drink (e.g, tea) cups are usually made of”. This question is standard in competitive examination syllabi for Polymer Technology.

250-280 is the correct answer to “90% of the caprolactum is converted to nylon-6 on its condensation polymerisation in the reactor maintained at a temperature of __________ °C.”. This question is standard in competitive examination syllabi for Polymer Technology.

150 is the correct answer to “Most of the plastics are safe to be used upto a maximum temperature of __________ °C.”. This question is standard in competitive examination syllabi for Polymer Technology.

In a chain without the elimination of water is the correct answer to “A copolymer is formed by the combination of two or more monomer molecules”. This question is standard in competitive examination syllabi for Polymer Technology.

Polyacrylonitrile is the correct answer to “Orlan fibre which is used as a wool sub stitute is”. This question is standard in competitive examination syllabi for Polymer Technology.

Propylene is the correct answer to “Zeigler - Natta catalyst (AlR 3 - AlCl 3 ) is used in the polymerisation of”. This question is standard in competitive examination syllabi for Polymer Technology.

10-2 to 10-5 is the correct answer to “Size range of polymer molecules varies from __________ metre.”. This question is standard in competitive examination syllabi for Polymer Technology.

Leathery is the correct answer to “__________ polymer is produced by the copolymerisation of vinyl chloride-vinyl acetate.”. This question is standard in competitive examination syllabi for Polymer Technology.

Saran is the correct answer to “A copolymer of vinyl and vinylidine chloride is called”. This question is standard in competitive examination syllabi for Polymer Technology.

Polyacrylonitrile is the correct answer to “Most of the fibre forming polymers are crystalline in nature, one of the exceptions being __________ which is amorphous in nature.”. This question is standard in competitive examination syllabi for Polymer Technology.

Carbon black is the correct answer to “Which of the following is the most important rubber compounding ingradient which is used to improve wearing qualities of both natural rubber & SBR by imparting toughness”. This question is standard in competitive examination syllabi for Polymer Technology.

Front wheel tyres of aeroplanes (i.e., heavy duty tyres) is the correct answer to “Styrene butadiene rubber (SBR) is never used for making”. This question is standard in competitive examination syllabi for Polymer Technology.

5°C and 1 kgf/cm2 is the correct answer to “Temperature and gage pressure maintained during the manufacture of cold SBR (styrene butadiene rubber) are”. This question is standard in competitive examination syllabi for Polymer Technology.

50°C and 3 - 4 kg/cm2 is the correct answer to “Temperature and gage pressure maintained during the manufacture of hot SBR (styrene butediene rubber) are”. This question is standard in competitive examination syllabi for Polymer Technology.

Dacron is the correct answer to “Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces”. This question is standard in competitive examination syllabi for Polymer Technology.

Brittle is the correct answer to “Polystyrene is a __________ plastic at room temperature.”. This question is standard in competitive examination syllabi for Polymer Technology.

250-280 is the correct answer to “Condensation polymerisation of caprolac-tum is carried out in the reactor maintained at a temperature of __________ °C for producing nylon-6.”. This question is standard in competitive examination syllabi for Polymer Technology.

Polythene is the correct answer to “__________ is an addition polymer”. This question is standard in competitive examination syllabi for Polymer Technology.

Cellulose is the correct answer to “The synthetic fibres produced from __________ are known as rayon.”. This question is standard in competitive examination syllabi for Polymer Technology.

Cellulose is the correct answer to “__________ is a natural fibre.”. This question is standard in competitive examination syllabi for Polymer Technology.

Polymethyl methacrylate (PMMA) is the correct answer to “Plexiglass (also called lucite) because of its high optical transparency is used for making lenses. It is chemically”. This question is standard in competitive examination syllabi for Polymer Technology.

Polyester is the correct answer to “Alkyd resin is a/an”. This question is standard in competitive examination syllabi for Polymer Technology.