MCQOPTIONS
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MCQOPTIONS
This section includes 607 Mcqs, each offering curated multiple-choice questions to sharpen your Chemical Engineering knowledge and support exam preparation. Choose a topic below to get started.
| 251. |
_Peptizers like aromatic mercaptans (e.g. thiophenes) are added in rubber to$? |
| A. | Protect rubber goods from attack by oxygen & ozone present in the atmosphere |
| B. | Reduce its viscosity to permit easier processing |
| C. | Reduce the time of vulcanisation and quantity of vulcanising agent |
| D. | Increase its viscosity |
| Answer» C. Reduce the time of vulcanisation and quantity of vulcanising agent | |
| 252. |
_Which of the following polymers are produced by employing all bulk polymerisation, solution polymerisation & suspension polymerisation technique of addition (chain) polymerisation?$? |
| A. | PVC |
| B. | Bakelite |
| C. | PTFE |
| D. | Epoxy resin |
| Answer» B. Bakelite | |
| 253. |
_Dacron is a$? |
| A. | Condensation polymerisation product of hexamethylene diamine and adipic acid |
| B. | Condensation polymerisation product of dimethyl terephthalate (DMT) and ethylene glycol |
| C. | Thermosetting material |
| D. | None of these |
| Answer» E. | |
| 254. |
_Scouring is a finishing operation during the manufacture of fibre, which aims at __________ of fibres.$? |
| A. | Improving the stretchability |
| B. | Dyeing/colouring |
| C. | Detergent solution washing |
| D. | Glycol soaking |
| Answer» D. Glycol soaking | |
| 255. |
_Silicone is a/an$? |
| A. | Monomer |
| B. | Inorganic polymer |
| C. | Thermoplastic material |
| D. | A natural polymer |
| Answer» C. Thermoplastic material | |
| 256. |
_Melamine formaldehyde resin which has a very high anti tacking properties, is not used for the$? |
| A. | Electrical insulation purpose |
| B. | Tanning of leather |
| C. | Strengthening of plaster of paris |
| D. | Decorative laminates |
| Answer» D. Decorative laminates | |
| 257. |
_In nylon-6, the number 6 represents the total number of$? |
| A. | Carbon atoms in the ring |
| B. | Carbon atoms in the linear polymer chain |
| C. | Nitrogen atoms in the ring |
| D. | Hydrogen atoms in the ring |
| Answer» C. Nitrogen atoms in the ring | |
| 258. |
_Phosphates (e.g., triceresyl, tributyl, tetrabutyl, tripheyl etc.) are added to polymers to act as$? |
| A. | Hardeners |
| B. | Anti-shrinkage agents |
| C. | Plasticisers |
| D. | Transparency improver |
| Answer» D. Transparency improver | |
| 259. |
___________ polymer is used for making unbreakable crockery.$? |
| A. | Thermoplastic |
| B. | Melamine |
| C. | Addition |
| D. | None of these |
| Answer» C. Addition | |
| 260. |
_Polythene is a/an$? |
| A. | Addition polymerisation product |
| B. | Condensation polymerisation product |
| C. | Thermosetting material |
| D. | None of these |
| Answer» B. Condensation polymerisation product | |
| 261. |
_In a co-polymer, the repeating units contain two different monomers. Which of the following is a copolymer?$? |
| A. | PTFE |
| B. | Buna-S |
| C. | PMMA |
| D. | Polycaprolactum |
| Answer» C. PMMA | |
| 262. |
_Teflon is$? |
| A. | Phenol formaldehyde |
| B. | An inorganic polymer |
| C. | Polytetra florouethylene (PTFE) |
| D. | A monomer |
| Answer» D. A monomer | |
| 263. |
_Viscose rayon is$? |
| A. | Cellulose nitrate |
| B. | Regenerated cellulose nitrate |
| C. | Regenerated cellulose acetate |
| D. | None of these |
| Answer» E. | |
| 264. |
_In a linear polymer, the monomeric units are linked together to form long straight chains. The cross linked or branched chain polymers compared to linear polymers have higher$? |
| A. | Densities |
| B. | Melting point |
| C. | Tensile strength |
| D. | Hardness, rigidity & brittleness |
| Answer» E. | |
| 265. |
_Polycaprolactum is nothing but$? |
| A. | Orlon |
| B. | Nylon 6, 6 |
| C. | Nylon 6 |
| D. | Saran |
| Answer» D. Saran | |
| 266. |
_Condensation polymerisation is not involved in the manufacture of$? |
| A. | Teflon |
| B. | Polythene |
| C. | Terylene |
| D. | Nylon |
| Answer» C. Terylene | |
| 267. |
_Cation exchange resins used in water treatment is made from __________ resin.$? |
| A. | Urea formaldehyde |
| B. | Epoxy |
| C. | Amino |
| D. | Phenolic |
| Answer» B. Epoxy | |
| 268. |
_Gutta parcha rubber is$? |
| 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 | |
| 269. |
_Bakelite (phenol-formaldehyde) resin can not be used as$? |
| A. | Decorative paint |
| B. | Decorative laminates |
| C. | Electrical insulation |
| D. | Glass reinforced plastics |
| Answer» B. Decorative laminates | |
| 270. |
_The inter particle forces between linear chains in nylon-66 are __________ bonds.$? |
| A. | Hydrogen |
| B. | Covalant |
| C. | Ionic |
| D. | None of these |
| Answer» B. Covalant | |
| 271. |
_Which of the following is not present in bagasse fibre?$? |
| A. | Cellulose |
| B. | Lignin |
| C. | Pentogens |
| D. | None of these |
| Answer» E. | |
| 272. |
_Nylon-66 compared to nylon-6 has$? |
| A. | Lower melting point |
| B. | More abrasion resistant properties |
| C. | Higher hardness |
| D. | All of the above |
| Answer» D. All of the above | |
| 273. |
_Which of the following is not a polymer of two monomers?$? |
| A. | Teflon |
| B. | Bakelite |
| C. | SBR |
| D. | None of these |
| Answer» B. Bakelite | |
| 274. |
_Ion exchange resins are made of$? |
| A. | Lucite |
| B. | Sulphonated bakelite |
| C. | Polystyrene |
| D. | Teflon |
| Answer» C. Polystyrene | |
| 275. |
_Typical solvent polymerisation reaction conditions for the production of high density polythene by Zeigler process is$? |
| A. | 7 kgf/cm² and 70 °C |
| B. | 1000 kgf/cm² and 100°C |
| C. | 7 kgf/cm² and 700°C |
| D. | 1 kgf/cm² (gage) and 70°C |
| Answer» B. 1000 kgf/cm¬¨‚⧠and 100¬¨‚àûC | |
| 276. |
_Due to its excellent permeability to air/gas and oxidation resistance, the tubes of automobile tyres is made of$? |
| A. | Cold SBR |
| B. | Butyl rubber |
| C. | Bunai N |
| D. | Buna S |
| Answer» C. Bunai N | |
| 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$? |
| A. | Teflon |
| B. | Bakelite |
| C. | SBR |
| D. | PVC |
| Answer» E. | |
| 278. |
_Addition of plasticisers to polymers results in partial neutralisation of intermolecular forces of attraction between the macro-molecules thereby increasing its$? |
| A. | Tensile strength |
| B. | Chemical resistance |
| C. | Flexibility |
| D. | All of the above |
| Answer» D. All of the above | |
| 279. |
_Tubeless tyres are made of __________ rubber, which is a co-polymer of isoprene & isobutylene.$? |
| A. | Nitrile |
| B. | Silicone |
| C. | Neoprene |
| D. | Butyl |
| Answer» E. | |
| 280. |
_Polypropylene is preferred to polythene, because the former is$? |
| A. | Non-inflammable |
| B. | Harder |
| C. | Stronger |
| D. | Both B & C |
| Answer» E. | |
| 281. |
_Neoprene is the trade name of$? |
| A. | Polyurethane |
| B. | Phenol formaldehyde |
| C. | Polychlorophrene |
| D. | Styrene butadiene rubber (SBR) |
| Answer» D. Styrene butadiene rubber (SBR) | |
| 282. |
_Nylon-6 as compared to nylon-66 is$? |
| A. | Harder |
| B. | More abrasion resistant |
| C. | Having higher melting point |
| D. | None of these |
| Answer» E. | |
| 283. |
Thermal pyrolysis of ethylene dichloride produces$? |
| A. | Trichlorethylene |
| B. | Vinyl chloride |
| C. | Ethanol amine |
| D. | Ethylene oxide |
| Answer» C. Ethanol amine | |
| 284. |
Condensation of bisphenol A with phosgene produces __________ which possess very good heat resistance.$? |
| A. | Polyurathane |
| B. | Polysulphone |
| C. | Polycarbonate |
| D. | Polyester |
| Answer» D. Polyester | |
| 285. |
Polymethyl methacrylate (PMMA) which is also known as perspex and is produced by bulk polymerisation of methyl methacrylate is not a __________ polymer.$? |
| A. | Thermoplastic |
| B. | Thermosetting |
| C. | Linear |
| D. | Glass like transparent |
| Answer» C. Linear | |
| 286. |
Nitrile rubber is produced by the polymerisation of$? |
| A. | Acrylonitrile & butadiene |
| B. | Acrylonitrile & styrene |
| C. | Isobutylene & isoprene |
| D. | None of these |
| Answer» B. Acrylonitrile & styrene | |
| 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$? |
| A. | Chloroethane |
| B. | Chlorophrene |
| C. | Isoprene |
| D. | None of these |
| Answer» C. Isoprene | |
| 288. |
Polymerisation process in which two or more monomers of chemically different nature take part is called$? |
| A. | Copolymerisation |
| B. | Addition polymerisation |
| C. | Chain polymerisation |
| D. | None of these |
| Answer» B. Addition polymerisation | |
| 289. |
Which of the following has the weakest intermolecular forces?$? |
| A. | Polyisoprene |
| B. | Nylon-66 |
| C. | Polystyrene |
| D. | Bakelite |
| Answer» B. Nylon-66 | |
| 290. |
Cellulose acetate has very high film permeability among all the polymers of the order of 5000 gm/100 m². Which of the following polymers has the maximum film elongation (of the order of 100%) ?$? |
| A. | Water impermeable cellophane |
| B. | Polythene |
| C. | Cellulose acetate |
| D. | Teflon |
| Answer» C. Cellulose acetate | |
| 291. |
Thermosetting polymers as compared to thermoplastic polymers$? |
| A. | Are formed by addition polymerisation |
| B. | Have three dimensional structure |
| C. | Have linear structure |
| D. | None of these |
| Answer» C. Have linear structure | |
| 292. |
Celluloid is$? |
| A. | Cellulose acetate |
| B. | Regenerated cellulose |
| C. | Cellulose nitrate |
| D. | Cellulose acetate butyrate |
| Answer» D. Cellulose acetate butyrate | |
| 293. |
Buna-S is also called$? |
| A. | Polyurathane |
| B. | SBR |
| C. | Teflon |
| D. | Bakelite |
| Answer» C. Teflon | |
| 294. |
Main constituent of cotton fibre is$? |
| A. | Lignin |
| B. | Cellulose |
| C. | Starch |
| D. | Gelatine |
| Answer» C. Starch | |
| 295. |
Low density polythene as compared to high density polythene is$? |
| A. | Harder |
| B. | Tougher |
| C. | Chemically inert |
| D. | More flexible |
| Answer» E. | |
| 296. |
Vulcanisation of raw rubber makes it$? |
| A. | Soft |
| B. | Less elastic |
| C. | Plastic |
| D. | Tacky |
| Answer» C. Plastic | |
| 297. |
Amino resins are used in paper treatment to improve its$? |
| A. | Wet tear and bursting strength |
| B. | Folding endurance |
| C. | Wet rub resistance |
| D. | All of the above |
| Answer» E. | |
| 298. |
Chain growth polymerisation is a process, in which the monomers are added in a chain fashion, and it requires an initiator to produce the free radical. An example of chain growth polymerisation products is$? |
| A. | Nylon-66 |
| B. | Teflon |
| C. | Polyester |
| D. | Bakelite |
| Answer» C. Polyester | |
| 299. |
Polymethyl methacrylate, which is an acrylic resin, is also called$? |
| A. | Thiokol |
| B. | Plexiglass or lucite |
| C. | Dacron |
| D. | Teflon |
| Answer» C. Dacron | |
| 300. |
Reaction of dimethyl terephthalate (DMT) and ethylene glycol produces$? |
| A. | Nylon-6 |
| B. | Dacron |
| C. | Polyester |
| D. | PVC |
| Answer» C. Polyester | |