InterviewSolution
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InterviewSolution
This section includes InterviewSolutions, each offering curated multiple-choice questions to sharpen your knowledge and support exam preparation. Choose a topic below to get started.
| 1. |
Soft drink and baby-feeding bottles are generally made of:A. PolyureaB. polyesterC. polymideD. Polystyrene |
| Answer» Correct Answer - D | |
| 2. |
Polymerisation of buta`-1,3`diene by free radical mechanism gives:A. trans`-1,4-polybutadieneB. cis`-1,4-polybutadieneC. polyvinyl polyetheneD. polyallyl polyethene |
| Answer» Correct Answer - A::B::C | |
| 3. |
Nylon threads of made of:A. Polyvinyl polymerB. Polyethylene polymerC. Polyester polymerD. Polyamide polymer |
| Answer» Correct Answer - D | |
| 4. |
The interparticle forces between linear chains in Nylon-6,6`are:A. H-bondsB. Covalent bondC. Ionic-bondsD. Coordinate bonds |
| Answer» Correct Answer - A | |
| 5. |
Interparticle forces present in Nylon-`6,6`are,A. Dipole-dipole internationsB. Hydrogen bondingC. van der Waals forceD. None of these |
| Answer» Correct Answer - B | |
| 6. |
Nylon-`6`is prepared from:A. Adipic acid and hexaamethylene diamine caprolactumB.C. Urea of formaldehydeD. Noen of these |
| Answer» Correct Answer - B | |
| 7. |
Which of used for the formation of nylon-`6,6`A. Sulphurous acidB. Adipic acidC. Sulphurous hexafluorideD. Phthalic acid |
| Answer» Correct Answer - B | |
| 8. |
Nylon-`6` is made from:A. Adipic acidB. ChloropreneC. `1,3`-ButadieneD. Phthalic acid |
| Answer» Correct Answer - D | |
| 9. |
Polymer used in bullet-proof glass is:A. NeomexB. LexanC. `PMMA`D. Kevlar |
| Answer» Correct Answer - B | |
| 10. |
Chloroprene is the repeating unit in:A. `PVC`B. NeopreneC. PolystyreneD. Polythene |
| Answer» Correct Answer - B | |
| 11. |
Whichof the following is a polymide?A. TeflonB. Nylon-`6,6`C. BakeliteD. Terylene |
| Answer» Correct Answer - B | |
| 12. |
Whichof the following is not a polymer?A. SucroseB. TeflonC. StarchD. Enzyme |
| Answer» Correct Answer - A | |
| 13. |
Which of the following is a fully flourinated polymer?A. ThiokolB. TeflonC. NeopreneD. `PVC` |
| Answer» Correct Answer - B | |
| 14. |
The commerical name of polymethyl (methacrylate)is:A. LuciteB. PlexiglasC. PerspexD. All the above |
| Answer» Correct Answer - D | |
| 15. |
A polymer of prop-`2`enenitrile is called:A. SaranB. OrlonC. DacronD. Teflon |
| Answer» Correct Answer - b | |
| 16. |
Monomer of is:A. `2`-MethylpropeneB. EtheneC. PropyleneD. Styrene |
| Answer» Correct Answer - A | |
| 17. |
Which of the following monomer gives the polymer neoprene on polymerisation?A. `CCl_(2)=CCl_(2)`B. `CH_(2)=CHCl`C. `CH_(2)=C(Cl)-CH=CH_(2)`D. `CF_(2)=CF_(2)` |
| Answer» Correct Answer - C | |
| 18. |
The monomer of the polymerA. `(CH_(3))_(2)C=C(CH_(3))_(2)`B. `CH_(3)CH=CH_(2)`C. `CH_(3)CH=CHCH_(3)`D. `H_(2)C=C(CH_(3))_(2)` |
| Answer» Correct Answer - D | |
| 19. |
The monomer unit of silicon, a water repellant, acid resistance,and heat resistant,polymer,is:A. `Si`B. `SiO_(2)`C. `R_(2)SiO`D. None of these |
| Answer» Correct Answer - C | |
| 20. |
A Polydisperse mixture of a polymer can be describe by the following composition-molar mass data: `{:(Mass%),25.0,50.0,25.0),(Mi(kgmol^(-1)),1.00,1.20,1.40):}` Calculate the number -average and the mass-average molar masses. |
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Answer» Each of the mass%values must be converted to values of`Ni`.Assuming`100.0g.m`of the mixture ,the amounts of each polymer are: Moles=(Wt.)/(Mw),` `N_(1)=(25)/(1000)=2.50xx10^(-2)mol` `N_(2)=(50)/(1200)=4.17xx10^(-2)mol` `N_(3)=(25)/(1400)=1.79xx10^(-2)mol` `Substituting the values in (i)and(ii)of Illustration 16.4,we get `Mbar(n)={:[((2.50xx10^(-2))(1.00kgmol^(-1))),(+(4.70xx10^(-2))(1.20kgmol^(-1))),(+(1.79xx10^(-2))(1.40kgmol^(-1)))]:}/(2.50xx10^(-2)mol+4.17xx10^(-2)mol+1.79xx10^(-2))=1.18kgmol^(-1)` `Mbar(w)={:[((2.50xx10^(-2)mol)(1.00)^(2)),(+(4.17xx10^(-2))(1.20)^(2)),(+(1.79xx10^(-2))(1.40)^(2)kg^(2)mol^(-1))]:}/([{:((2.50xx10^(-2)mol)(1.00)),(+(4.17xx10^(-2))(1.20)),(+(1.79xx10^(-2))(1.40)):}]Kg)=1.20kgmol^(-1)` |
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| 21. |
If`N_(1),N_(2),N_(3),……`are the number of molcules with molecular masses `M_(1),M_(2),(M_(3),…`respectively ,then mass average molar mass is expressed as:A. `(N_(1)M_(1)^(2),N_(2)M_(2)^(2),+……)/((N_(1)M_(1),N_(2)M_(2),+……))=(SigmaNiMi^(2))/(SigmaNiMi)`B. `(N_(1)M_(1),N_(2)M_(2),+……)/((N_(1),N_(2),+……))=(SigmaNiMi)/(SigmaNi)`C. `(SigmaMi^(2))/(SigmaNi)`D. `(SigmaNiMi)/(SigmaMi)` |
| Answer» Correct Answer - a | |
| 22. |
If`N_(1),N_(2),N_(3),……`are the number of molcules with molecular masses `M_(1),M_(2),(M_(3),…`respectively ,then mass average molar mass is expressed as:A. `(SigmaNiMi^(2))/(SigmaNiMi)`B. `(SigmaNiMi)/(SigmaNi)`C. `(SigmaMi^(2))/(SigmaNi)`D. `(SigmaNiMi)/(SigmaMi)` |
| Answer» Correct Answer - A | |
| 23. |
Statement 1:Teflon has high thermal stability and chemical inertness. Statement 2:It has strong `(C-F)`bonds.A. Statement `1` is true ,statement `2`is true,statement`2`is the correct explanation of statement`1`B. Statement `1` is true ,statement `2`is true,statement`2`is not the correct explanation of statement`1`C. Statement `1` is true ,statement `2`is falseD. Statement `1` is false,statement `2`is true |
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Answer» Correct Answer - A Both statements are correct,and statement `2`is the correct explanation of statement `1`. |
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| 24. |
The chemical name of melamine is:SA. `2,4`-Diamino-`1,3,5`-triazineB. `2`-Amino-`1,3,5`-triazineC. `2,4,6`-Triamino-`1,3,5`-TriazineD. `1,3,5`-Triamino-`2,4,6`-triazine |
| Answer» Correct Answer - C | |
| 25. |
The starting material of `PCTFE`is:A. Monochlortrifluro ethyleneB. TetrafluoroethyleneC. Vinyl chlorideD. Styrene |
| Answer» Correct Answer - A | |
| 26. |
Cellulose is a condensation polymer is:A. MaltoseB. `beta`-GlucoseC. `alpha`-GlucoseD. `beta`-Fructose |
| Answer» Correct Answer - B | |
| 27. |
Which of the following are condensation copolymers?A. Nylon`-6`B. Nylon-6,6`C. DacronD. Glyptal |
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Answer» Correct Answer - A::B::C::D All polysters and polymides are condensation polymers. |
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| 28. |
Which of the following are additional homopolymers?A. TeflonB. `SBR`C. `PVC`D. Natural rubber |
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Answer» Correct Answer - A::C::D SBR is copolymer . |
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| 29. |
Which of the following polymers contain`1,3,-`butadiene as one of the monomers?A. Nylon-6,6`B. `PHBV`C. Nylon`-2-` Nylon`-6`D. Polychloroprene |
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Answer» Correct Answer - A::B::C::D (c)`ABS` (refers to acrylonitrile butadiene styrene) .(d)`SBR`(refers to styrene butadiene rubber) Butyl rubber also refers to butadiene. (d)Nitrile rubber refers to`Bune-N` |
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| 30. |
In the vulcanisation of rubber:A. Sulpher reacts to form a new compound.B. Sulpher cross-linked are introducedC. Sulpher forms a very thin protective layer over rubber.D. All the statements are correct. |
| Answer» Correct Answer - B | |
| 31. |
Which of the following fibres are made of polyamides?A. WoolB. Natural silkC. `ABS` plasticD. `SBR` |
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Answer» Correct Answer - A::b Rayon is made of cellulose. |
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| 32. |
Which of the following is a common example of fibres?A. BakeliteB. Buna-`S`C. Nylon-`6,6`D. Nylon-`6` |
| Answer» Correct Answer - C | |
| 33. |
Which of the following can not be used as plasticisers?A. Sodium nexametaphosphateB. Di-n-butylphthalateC. Tricresyl phosphateD. Diethyl-phthalate |
| Answer» Correct Answer - B::C | |
| 34. |
Which of the following are not thermosetting polymers?A. BakeliteB. PolystyreneC. PVCD. Melmac |
| Answer» Correct Answer - B::C | |
| 35. |
Which of the following are plasticisers?A. `DOP`B. `DBP`C. Cryesyl phosphateD. Sodium adipate |
| Answer» Correct Answer - A::B::C | |
| 36. |
Which of the following are polycarbamate ester polymers?A. PolyurethaneB. Perlon-`U`C. MelmacD. Saran |
| Answer» Correct Answer - A::B | |
| 37. |
Which of the following statements are correct about Nylon-`6,6`?A. Nylon fibers have higher tensile strenght than terylene fibers.B. Nylon fibers have lower tensile strenght than terylene fibers.C. In nylon, there is strong ihntermolecular `H`-bonding, while in trylene there is weak dipole-dipole interactionD. In nylon, there is weak ihntermolecular `H`-bonding, while in trylene there is strong dipole-dipole interaction |
| Answer» Correct Answer - A::C | |
| 38. |
Which of the following statements are correct about phenol-formaldehyde resin?A. Novolac or resol is a linear polymer and is used in the manufacture of adhesive.B. Bakelite is a cross-linked polymer and is used in making switches and plugs.C. Novolac is preparede when `(P//F)` (phenol//formaldehyde) ratio is greater than 1, Whereas bakelite is prepared when `(P//F)` ratio is less than 1.D. Novolac is prepared when `P//Flt1` , and bakelite is prepared when `P//F`gt1` . |
| Answer» Correct Answer - A::B::C | |
| 39. |
Mass-average molecular mass of a polymer is determined by:A. Light scattering and ultracentrifuge methodB. Osmotic pressureC. Depression of frezing pointD. Elevation in boiling point |
| Answer» Correct Answer - A | |
| 40. |
Number-average molecular mass of a polymer is determined by:A. Light scattering and ultracentrifuge methodB. Osmotic pressureC. Depression of frezing pointD. Elevation in boiling point |
| Answer» Correct Answer - B | |
| 41. |
Calaulate the average molecules mass of a polymer sample in which`30%`molecules have a molecular mass of`20,000,40%`have`30,000`,and the rest`30%`have`60,000` |
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Answer» `Mbar(n)`and`Mbar(w)`of this sample will be `Mbar(n)=((30xx20,000)+(40xx30,000)+(30xx60,000))/(30+40+30)` `=36000` `Mbar(w)=(30(20,000)^(2)+40(30,000)^(2)+30(60,000)^(2))/(30xx20,000+40xx30,000+30xx60,000)` `=43333` |
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| 42. |
Explain why propone polymerises in isotactic,syndiotactic and atactic forms ,while vinylidence chloride`(CH_(2)=CCl_(2))`does not. (b) Which form of polypropene (isotatic,syndiotactic,and atactic)Would be optically active? |
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Answer» (a)Polypropene has chiral`C`atoms and,therefore,exists in different forms as mentioned .Polyethylidene chloride,on the other hand ,does not have chiral`C` atom and thus does not exist in the forms mentioned. (b)All formsof polypropence`(PP)`would exist in equal amount of enantiomers,with net specific rotaiton of zero,So each form would exist as racemates. |
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| 43. |
Which of the following processes can be used to prepare polystyrene?A. AnionicB. CationicC. Free radicalsD. Zigler-Natta |
| Answer» Correct Answer - A::B::C::D | |
| 44. |
Natural rubber is:A. All-trans polyisopreneB. ChloropreneC. Buna-`S`D. All-cis polyisoprene |
| Answer» Correct Answer - D | |
| 45. |
Polyurethanes:A. Have structure features of both an ester and an amide.B. Have a formula`H_(2)N-underset(O)underset(||)(C )-O-CH_(2)-CH_(3)`.C. Are obtianed from`p`-phenylene disocyanate and ethylene glycol.D. Are used as foam rubber in upholstery. |
| Answer» Correct Answer - C | |
| 46. |
Statement 1:Novolac is soft and has a low melting poitn. Statement 2:It is a highly crossed -linked polymer.A. Statement `1` is true ,statement `2`is true,statement`2`is the correct explanation of statement`1`B. Statement `1` is true ,statement `2`is true,statement`2`is not the correct explanation of statement`1`C. Statement `1` is true ,statement `2`is falseD. Statement `1` is false,statement `2`is true |
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Answer» Correct Answer - C Nonvolac is a linear-chain polymer. |
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| 47. |
Statement 1:Bakelite is hard and has high melting point Statement 2:Intermolecular forces of attractions in it are `H`-bonding.A. Statement `1` is true ,statement `2`is true,statement`2`is the correct explanation of statement`1`B. Statement `1` is true ,statement `2`is true,statement`2`is not the correct explanation of statement`1`C. Statement `1` is true ,statement `2`is falseD. Statement `1` is false,statement `2`is true |
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Answer» Correct Answer - C It is a highly cross -linked polymer. |
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| 48. |
Statement 1:Polybutadiene is an example of step-growth polymer. Statement 2: Co[A. Statement `1` is true ,statement `2`is true,statement`2`is the correct explanation of statement`1`B. Statement `1` is true ,statement `2`is true,statement`2`is not the correct explanation of statement`1`C. Statement `1` is true ,statement `2`is falseD. Statement `1` is false,statement `2`is true |
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Answer» Correct Answer - D Polybutadiene is an example of chain-growth polymer(addition polymerisation) |
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| 49. |
A Copolymer is :A. Styrene butadiene rubberB. PolytheneC. TeryleneD. Nylon |
| Answer» Correct Answer - A | |
| 50. |
The fields of polymer chemistry was revolutionsed by:A. Kharasch in `USA`B. Karl Ziegler in GermanyC. Giulio Natta in ItalyD. Barton in England |
| Answer» Correct Answer - B::C | |