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MCQs 1: Ion exchange resins are made of____________________?

Lucite Sulphonated Bakelite Polystyrene Teflon
Answer Explanation

MCQs 2: Alkyd resin is a/an___________________?

Polyamide Polyester Polyolefin Addition polymer
Answer Explanation

MCQs 3: The physical state in which polymers exist is___________________?

Melts & rubber like state Amorphous glassy state Partially crystalline state All A., B. and C.
Answer Explanation

MCQs 4: Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m2. Which of the following polymers has the maximum film elongation (of the order of 100%) ?

Water impermeable cellophane Polythene Cellulose acetate Teflon
Answer Explanation

MCQs 5: Polycaprolactam (Nylon – 6) is produced by the condensation polymerisation of caprolactam at 240-280°C in which the conversion of caprolactam is about ______________ percent?

50 75 90 99
Answer Explanation

MCQs 6: Low pressure Zeigler process for the manufacture of polythene uses a catalyst which is_______________________?

Ni V2O5 Fe Aluminium triethyl combined with titanium tetrachloride
Answer Explanation

MCQs 7: Plastic articles are normally produced by _____________ moulding?

Green sand Injection Shell Dry sand
Answer Explanation

MCQs 8: Temperature maintained in the emulsion polymerisation reactor for PVC manufacture is about ______________ ° C?

-20 50 50 500
Answer Explanation

MCQs 9: Diphenylamine is added to rubber to_________________?

Vulcanise it Protect it from deterioration on exposure to air Make it non-inflammable Make it thermosetting
Answer Explanation

MCQs 10: Plastic tubes & pipes are generally made by ______________ moulding?

Injection Transfer Extrusion Compression
Answer Explanation

MCQs 11: Which of the following is an elastomer ?

Thiokol Phenol formaldehyde Urea formaldehyde Polystyrene
Answer Explanation

MCQs 12: ______________ is an addition polymer ?

Nylon Bakelite Polythene None of these
Answer Explanation

MCQs 13: Liners of bags are usually made of ____________________?

Polythene PVC Polypropylene Polyesters
Answer Explanation

MCQs 14: Most commonly used rubber vulcanisation agent is __________________?

Sulphur Bromine Platinum Alumina
Answer Explanation

MCQs 15: Thermocol (expanded polystyrene) is not used for __________________?

Low temperature thermal insulation as in refrigerator and air conditioners Acoustic control and ceiling for building High temperature thermal insulation in furnaces Packing of delicate electronic gadgets
Answer Explanation

MCQs 16: Which of the following is not a polymer of two monomers ?

Teflon Bakelite SBR None of these
Answer Explanation

MCQs 17: Buna-S is also called____________________?

Polyurethane SBR Teflon Bakelite
Answer Explanation

MCQs 18: Pick out the wrong statement ?

Cold SBR is superior as compared to hot SBR Polymerisation temperature can modify the properties of SBR Production of cold SBR employs lower pressure as compared to that of hot SBR None of these
Answer Explanation

MCQs 19: Pick out the wrong statement ?

Linear polymers are formed from bifunctional groups only and are normally thermoplastic Cross-linked branched chain polymers are either elastometric or thermosetting Branching in case of cross-linked polymers caused by small amount of impurities in bifunctional monomer formulation reduces its solubility and increas Dibasic acids reacts with dihydric alcohols to give polyesters using addition polymerisation reaction
Answer Explanation

MCQs 20: Pick out the wrong statement ?

Polymeric fibres are never produced by addition polymerisation Property of tackiness is exhibited by uncured rubber Sharp melting point is not observed in thermoplastic polymers Polythene generally has an excellent resistance to ultra violet rays
Answer Explanation

MCQs 21: Pick out the wrong statement ?

Addition polymers are generally formed by chain growth polymerisation Condensation polymers are generally formed by step growth polymerisation Teflon is formed by step growth polymerisation Bakelite is formed by step growth polymerisation
Answer Explanation

MCQs 22: Pick out the wrong statement?

Polymers made of only one monomer is called homopolymer Polymers made of more than one monomer is called copolymer or mixed polymer Vulcanised rubber is more elastic than natural rubber The intermolecular forces in thermoplastic polymers are intermediate to that of elastomers & fibres
Answer Explanation

MCQs 23: Pick out the wrong statement ?

Polystyrene is a thermoplastic polymer Protein is a natural polymer Neoprene is a natural rubber Polythene is a copolymer, while SBR is a homopolymer
Answer Explanation

MCQs 24: Pick out the wrong statement?

Denier is defined as weight in gm of 9000 metres length of a fibre, while tex is defined as weight in gm of 1000 metres length of fibre Crimp is a measure of the difference between the length of the straightened and unstraightened fibre Dacron fibres, acrylic fibres, viscose rayon fibres & cellulose acetate fibres are all prepared by wet spinning Nylon fibres have greater water absorption capacity than polyester fibres
Answer Explanation

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