_Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to$?

Reduce the time of vulcanisation and quantity of vulcanising agent

Protect rubber goods from attack by oxygen & ozone present in the atmosphere

Reduce its viscosity to permit easier processing

Reduce the time of vulcanisation and quantity of vulcanising agent

Condensation polymerisation product of hexamethylene diamine and adipic acid

Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol

_Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the$?

Strengthening of plaster of paris

_In nylon-6, the number 6 represents the total number of$?

Carbon atoms in the linear polymer chain

Condensation polymerisation product

Addition polymerisation product

Condensation polymerisation product

Polytetra florouethylene (PTFE)

_In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher$?

Hardness, rigidity & brittleness

_Gutta parcha rubber is$?

Soft & tacky at room temperature

Recovered by coagulation of rubber latex

_Nylon-66 compared to nylon-6 has$?

More abrasion resistant properties

_Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is$?

1000 kgf/cm¬¨‚â§ and 100¬¨‚àûC

7 kgf/cm¬¨‚â§ and 70 ¬¨‚àûC

1000 kgf/cm¬¨‚â§ and 100¬¨‚àûC

7 kgf/cm¬¨‚â§ and 700¬¨‚àûC

1 kgf/cm¬¨‚â§ (gage) and 70¬¨‚àûC

Thermosetting polymers as compared to thermoplastic polymers$?

Are formed by addition polymerisation

Have three dimensional structure

607 + Mcqs in Polymer Technology in Chemical Engineering Page 6 McqOptions

251.	_Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to$?
A.	Protect rubber goods from attack by oxygen & ozone present in the atmosphere
B.	Reduce its viscosity to permit easier processing
C.	Reduce the time of vulcanisation and quantity of vulcanising agent
D.	Increase its viscosity
Answer» C. Reduce the time of vulcanisation and quantity of vulcanising agent

Discussion

252.	_Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation?$?
A.	PVC
B.	Bakelite
C.	PTFE
D.	Epoxy resin
Answer» B. Bakelite

Discussion

253.	_Dacron is a$?
A.	Condensation polymerisation product of hexamethylene diamine and adipic acid
B.	Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol
C.	Thermosetting material
D.	None of these
Answer» E.

Discussion

254.	_Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.$?
A.	Improving the stretchability
B.	Dyeing/colouring
C.	Detergent solution washing
D.	Glycol soaking
Answer» D. Glycol soaking

Discussion

255.	_Silicone is a/an$?
A.	Monomer
B.	Inorganic polymer
C.	Thermoplastic material
D.	A natural polymer
Answer» C. Thermoplastic material

Discussion

256.	_Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the$?
A.	Electrical insulation purpose
B.	Tanning of leather
C.	Strengthening of plaster of paris
D.	Decorative laminates
Answer» D. Decorative laminates

Discussion

257.	_In nylon-6, the number 6 represents the total number of$?
A.	Carbon atoms in the ring
B.	Carbon atoms in the linear polymer chain
C.	Nitrogen atoms in the ring
D.	Hydrogen atoms in the ring
Answer» C. Nitrogen atoms in the ring

Discussion

258.	_Phosphates (e.g., triceresyl, tributyl, tetrabutyl, tripheyl etc.) are added to polymers to act as$?
A.	Hardeners
B.	Anti-shrinkage agents
C.	Plasticisers
D.	Transparency improver
Answer» D. Transparency improver

Discussion

259.	___________ polymer is used for making unbreakable crockery.$?
A.	Thermoplastic
B.	Melamine
C.	Addition
D.	None of these
Answer» C. Addition

Discussion

260.	_Polythene is a/an$?
A.	Addition polymerisation product
B.	Condensation polymerisation product
C.	Thermosetting material
D.	None of these
Answer» B. Condensation polymerisation product

Discussion

261.	_In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer?$?
A.	PTFE
B.	Buna-S
C.	PMMA
D.	Polycaprolactum
Answer» C. PMMA

Discussion

262.	_Teflon is$?
A.	Phenol formaldehyde
B.	An inorganic polymer
C.	Polytetra florouethylene (PTFE)
D.	A monomer
Answer» D. A monomer

Discussion

263.	_Viscose rayon is$?
A.	Cellulose nitrate
B.	Regenerated cellulose nitrate
C.	Regenerated cellulose acetate
D.	None of these
Answer» E.

Discussion

264.	_In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher$?
A.	Densities
B.	Melting point
C.	Tensile strength
D.	Hardness, rigidity & brittleness
Answer» E.

Discussion

265.	_Polycaprolactum is nothing but$?
A.	Orlon
B.	Nylon 6, 6
C.	Nylon 6
D.	Saran
Answer» D. Saran

Discussion

266.	_Condensation polymerisation is not involved in the manufacture of$?
A.	Teflon
B.	Polythene
C.	Terylene
D.	Nylon
Answer» C. Terylene

Discussion

267.	_Cation exchange resins used in water treatment is made from __________ resin.$?
A.	Urea formaldehyde
B.	Epoxy
C.	Amino
D.	Phenolic
Answer» B. Epoxy

Discussion

268.	_Gutta parcha rubber is$?
A.	Soft & tacky at room temperature
B.	An isomer of natural rubber
C.	A thermosetting resin
D.	Recovered by coagulation of rubber latex
Answer» C. A thermosetting resin

Discussion

269.	_Bakelite (phenol-formaldehyde) resin can not be used as$?
A.	Decorative paint
B.	Decorative laminates
C.	Electrical insulation
D.	Glass reinforced plastics
Answer» B. Decorative laminates

Discussion

270.	_The inter particle forces between linear chains in nylon-66 are __________ bonds.$?
A.	Hydrogen
B.	Covalant
C.	Ionic
D.	None of these
Answer» B. Covalant

Discussion

271.	_Which of the following is not present in bagasse fibre?$?
A.	Cellulose
B.	Lignin
C.	Pentogens
D.	None of these
Answer» E.

Discussion

272.	_Nylon-66 compared to nylon-6 has$?
A.	Lower melting point
B.	More abrasion resistant properties
C.	Higher hardness
D.	All of the above
Answer» D. All of the above

Discussion

273.	_Which of the following is not a polymer of two monomers?$?
A.	Teflon
B.	Bakelite
C.	SBR
D.	None of these
Answer» B. Bakelite

Discussion

274.	_Ion exchange resins are made of$?
A.	Lucite
B.	Sulphonated bakelite
C.	Polystyrene
D.	Teflon
Answer» C. Polystyrene

Discussion

275.	_Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is$?
A.	7 kgf/cm¬¨‚â§ and 70 ¬¨‚àûC
B.	1000 kgf/cm¬¨‚â§ and 100¬¨‚àûC
C.	7 kgf/cm¬¨‚â§ and 700¬¨‚àûC
D.	1 kgf/cm¬¨‚â§ (gage) and 70¬¨‚àûC
Answer» B. 1000 kgf/cm¬¨‚â§ and 100¬¨‚àûC

Discussion

276.	_Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of$?
A.	Cold SBR
B.	Butyl rubber
C.	Bunai N
D.	Buna S
Answer» C. Bunai N

Discussion

277.	_Rexin (also called artificial leather), which is used for making table cover, automobile seat cover, shoes etc. is made by coating thick cloth with molten$?
A.	Teflon
B.	Bakelite
C.	SBR
D.	PVC
Answer» E.

Discussion

278.	_Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its$?
A.	Tensile strength
B.	Chemical resistance
C.	Flexibility
D.	All of the above
Answer» D. All of the above

Discussion

279.	_Tubeless tyres are made of __________ rubber, which is a co-polymer of isoprene & isobutylene.$?
A.	Nitrile
B.	Silicone
C.	Neoprene
D.	Butyl
Answer» E.

Discussion

280.	_Polypropylene is preferred to polythene, because the former is$?
A.	Non-inflammable
B.	Harder
C.	Stronger
D.	Both B & C
Answer» E.

Discussion

281.	_Neoprene is the trade name of$?
A.	Polyurethane
B.	Phenol formaldehyde
C.	Polychlorophrene
D.	Styrene butadiene rubber (SBR)
Answer» D. Styrene butadiene rubber (SBR)

Discussion

282.	_Nylon-6 as compared to nylon-66 is$?
A.	Harder
B.	More abrasion resistant
C.	Having higher melting point
D.	None of these
Answer» E.

Discussion

283.	Thermal pyrolysis of ethylene dichloride produces$?
A.	Trichlorethylene
B.	Vinyl chloride
C.	Ethanol amine
D.	Ethylene oxide
Answer» C. Ethanol amine

Discussion

284.	Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance.$?
A.	Polyurathane
B.	Polysulphone
C.	Polycarbonate
D.	Polyester
Answer» D. Polyester

Discussion

285.	Polymethyl methacrylate (PMMA) which is also known as perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer.$?
A.	Thermoplastic
B.	Thermosetting
C.	Linear
D.	Glass like transparent
Answer» C. Linear

Discussion

286.	Nitrile rubber is produced by the polymerisation of$?
A.	Acrylonitrile & butadiene
B.	Acrylonitrile & styrene
C.	Isobutylene & isoprene
D.	None of these
Answer» B. Acrylonitrile & styrene

Discussion

287.	Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is$?
A.	Chloroethane
B.	Chlorophrene
C.	Isoprene
D.	None of these
Answer» C. Isoprene

Discussion

288.	Polymerisation process in which two or more monomers of chemically different nature take part is called$?
A.	Copolymerisation
B.	Addition polymerisation
C.	Chain polymerisation
D.	None of these
Answer» B. Addition polymerisation

Discussion

289.	Which of the following has the weakest intermolecular forces?$?
A.	Polyisoprene
B.	Nylon-66
C.	Polystyrene
D.	Bakelite
Answer» B. Nylon-66

Discussion

290.	Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m¬¨‚â§. Which of the following polymers has the maximum film elongation (of the order of 100%) ?$?
A.	Water impermeable cellophane
B.	Polythene
C.	Cellulose acetate
D.	Teflon
Answer» C. Cellulose acetate

Discussion

291.	Thermosetting polymers as compared to thermoplastic polymers$?
A.	Are formed by addition polymerisation
B.	Have three dimensional structure
C.	Have linear structure
D.	None of these
Answer» C. Have linear structure

Discussion

292.	Celluloid is$?
A.	Cellulose acetate
B.	Regenerated cellulose
C.	Cellulose nitrate
D.	Cellulose acetate butyrate
Answer» D. Cellulose acetate butyrate

Discussion

293.	Buna-S is also called$?
A.	Polyurathane
B.	SBR
C.	Teflon
D.	Bakelite
Answer» C. Teflon

Discussion

294.	Main constituent of cotton fibre is$?
A.	Lignin
B.	Cellulose
C.	Starch
D.	Gelatine
Answer» C. Starch

Discussion

295.	Low density polythene as compared to high density polythene is$?
A.	Harder
B.	Tougher
C.	Chemically inert
D.	More flexible
Answer» E.

Discussion

296.	Vulcanisation of raw rubber makes it$?
A.	Soft
B.	Less elastic
C.	Plastic
D.	Tacky
Answer» C. Plastic

Discussion

297.	Amino resins are used in paper treatment to improve its$?
A.	Wet tear and bursting strength
B.	Folding endurance
C.	Wet rub resistance
D.	All of the above
Answer» E.

Discussion

298.	Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is$?
A.	Nylon-66
B.	Teflon
C.	Polyester
D.	Bakelite
Answer» C. Polyester

Discussion

299.	Polymethyl methacrylate, which is an acrylic resin, is also called$?
A.	Thiokol
B.	Plexiglass or lucite
C.	Dacron
D.	Teflon
Answer» C. Dacron

Discussion

300.	Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces$?
A.	Nylon-6
B.	Dacron
C.	Polyester
D.	PVC
Answer» C. Polyester

Discussion

Explore topic-wise MCQs in Chemical Engineering.

_Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to$?

_Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation?$?

_Dacron is a$?

_Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.$?

_Silicone is a/an$?

_Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the$?

_In nylon-6, the number 6 represents the total number of$?

_Phosphates (e.g., triceresyl, tributyl, tetrabutyl, tripheyl etc.) are added to polymers to act as$?

___________ polymer is used for making unbreakable crockery.$?

_Polythene is a/an$?

_In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer?$?

_Teflon is$?

_Viscose rayon is$?

_In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher$?

_Polycaprolactum is nothing but$?

_Condensation polymerisation is not involved in the manufacture of$?

_Cation exchange resins used in water treatment is made from __________ resin.$?

_Gutta parcha rubber is$?

_Bakelite (phenol-formaldehyde) resin can not be used as$?

_The inter particle forces between linear chains in nylon-66 are __________ bonds.$?

_Which of the following is not present in bagasse fibre?$?

_Nylon-66 compared to nylon-6 has$?

_Which of the following is not a polymer of two monomers?$?

_Ion exchange resins are made of$?

_Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is$?

_Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of$?

_Rexin (also called artificial leather), which is used for making table cover, automobile seat cover, shoes etc. is made by coating thick cloth with molten$?

_Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its$?

_Tubeless tyres are made of __________ rubber, which is a co-polymer of isoprene & isobutylene.$?

_Polypropylene is preferred to polythene, because the former is$?

_Neoprene is the trade name of$?

_Nylon-6 as compared to nylon-66 is$?

Thermal pyrolysis of ethylene dichloride produces$?

Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance.$?

Polymethyl methacrylate (PMMA) which is also known as perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer.$?

Nitrile rubber is produced by the polymerisation of$?

Neoprene which is used for making shoe heels & belts is superior to natural rubber in its stability to aerial oxidation and resistance to oils & other solvents. The monomer used for making neoprene is$?

Polymerisation process in which two or more monomers of chemically different nature take part is called$?

Which of the following has the weakest intermolecular forces?$?

Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m¬¨‚â§. Which of the following polymers has the maximum film elongation (of the order of 100%) ?$?

Thermosetting polymers as compared to thermoplastic polymers$?

Celluloid is$?

Buna-S is also called$?

Main constituent of cotton fibre is$?

Low density polythene as compared to high density polythene is$?

Vulcanisation of raw rubber makes it$?

Amino resins are used in paper treatment to improve its$?

Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is$?

Polymethyl methacrylate, which is an acrylic resin, is also called$?

Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces$?