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.
| 51. |
Ziegar -Natta catalystsA. Are triethyl aluminium titanium tetrachloride complex `(C_(2)H_(5))_(3)Al+TiCl_(4)` .B. Are used to prepare stereospecific addition polymers.C. Are employed to have strereochemicalD. All the above. |
| Answer» Correct Answer - A | |
| 52. |
Which of the following is an example of copolymer?A. Buna-`S`B. `PAN`C. polytheneD. `PTFE` |
| Answer» Correct Answer - A | |
| 53. |
`GRA`is a copolymer of:A. Butadiene and acrylonitrileB. Butadiene and adipic acidC. Chloroprene and acrylonitrileD. Chloroprene and adipic acid |
| Answer» Correct Answer - A | |
| 54. |
Which of the following can be remelted time and again without producting any change?A. Thermosetting polymersB. Thermoplastic polymersC. BakeliteD. Melamine |
| Answer» Correct Answer - B | |
| 55. |
Isa homopolymer or a copolymer?Is it an addition or a condensation polymer? |
| Answer» It is a homopolymer,and the monomer from which it is obtained is styrene,`C_(6)H_(5)-CH=CH_(2)`.Since the monomer contains a double bond,it forms an additional polymer. | |
| 56. |
Which of the following are used as chain transfer agents?A. `CCl_(4)`B. `CBr_(4)`C. BenzoquinoneD. Benzoyl peroxide |
| Answer» Correct Answer - A::B | |
| 57. |
Which of the following are used as free radical chain initiators?A. Benzoyl preoxideB. `t`-Butyl peroxideC. `CCl_(4)`D. Benzoyl peroxide |
| Answer» Correct Answer - A::B | |
| 58. |
Which of the following are biodegradabe polymers?A. `PHBV`B. Nylon`-2,6`C. Polyglycolic and polylactic acidsD. Perlon-`U` |
| Answer» Correct Answer - A::B::C | |
| 59. |
Which of the following polymers can be made by anionic addition polymerisation mechanism?A. `PVC`B. `PAN`C. TelflonD. `PP` |
| Answer» Correct Answer - A::B::C | |
| 60. |
Which of the following are polyamide polymers?A. Nylon`-6,10`B. Nylon`-6,6`C. Nylon`-5`D. Perlon`-U` |
| Answer» Correct Answer - A::B::C | |
| 61. |
Which of the following are polyester polymers?A. BakeliteB. DacronC. Glyptal resinsD. Nylon`5` |
| Answer» Correct Answer - B::C | |
| 62. |
Explain the unctionality of a monomer? |
| Answer» Functionality means the number of binding sites in a molecules.For example ,functionality of ethene,Propene acrylonitrile and styrene is one,Whereas that of butadiene ,adopic acid ,terephthalic acid,and hexamethylene diamine is two. | |
| 63. |
Which one is not a step polymer?A. Nylon`6,6`B. Nylon-`6`C. GlyptalD. `PMMA` |
| Answer» Correct Answer - D | |
| 64. |
Which of the following polymers can be made by additional polymersation reaction?A. Nylon-6B. Perlon-`U`C. `HDPE`D. `LDPE` |
|
Answer» Correct Answer - C::D Alkenes undergo addition polymerisation. |
|
| 65. |
Which of the following polymers can be made by condensation polymersation reaction?A. DacronB. Nylon-`6.6`C. BakeliteD. `PE` |
|
Answer» Correct Answer - A::B::C Polyester and polyamide undergo condensation polumerisation |
|
| 66. |
Synethetic human hair wigs ar emade for a copolymer of vinyl chloride and acrylintrile ,which is called:A. `PVC`B. PolyacrylonitrileC. CelluloseD. Dynel |
| Answer» Correct Answer - D | |
| 67. |
One would come across the terms isotactic,syndiotactic,and atactic in connection with the chemistry of:A. PolymersB. DyesC. CrystalsD. Textiles |
| Answer» Correct Answer - A | |
| 68. |
Which one is not the chain-growth polymer?A. Natural rubberB. PolytheneC. PolypropyleneD. Terylene |
| Answer» Correct Answer - D | |
| 69. |
Which of the following is a step-growth polymer?A. PolyacrylonitrileB. polyisopreneC. NylonD. Polythene |
| Answer» Correct Answer - C | |
| 70. |
Polymersation may occur through intermediate formation of:A. CarbocationsB. CarbanionsC. Free radicalsD. Carbenes |
| Answer» Correct Answer - A::B::C | |
| 71. |
Which of the following is a chain-growth polymer?A. NylonB. DacronC. GlyptalD. Polypropylene |
| Answer» Correct Answer - D | |
| 72. |
All terpenes have carbon skeletons made up of:A. Isoprenes unitsB. Vinyl unitsC. AlkenesD. Ethylene units |
| Answer» Correct Answer - A | |
| 73. |
Which of the following are biodegradable polymers?A. Nylon-`6.6`,B. `PHBV`C. `Nylon-2-Nylon-6`D. Polychloroprene |
| Answer» Correct Answer - B::C | |
| 74. |
Statement1:`PUF`(polyurethane foam) is spongy. Statement 2:During the preparation of `PUF,CO_(2)`is evolved ,which forms bubbles that are trapped within the bulk of polymer.As it solidifies ,it gives spongy product.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 |
| Answer» Correct Answer - A | |
| 75. |
Orlon has a unit of:A. Vinyl cyanideB. IsopreneC. GlycolD. Acrolein |
| Answer» Correct Answer - A | |
| 76. |
Which of the following is a biodegradable polymer?A. CelluloseB. Nylon`-6`C. Polyvinyl chlorideD. Polythene |
| Answer» Correct Answer - A | |
| 77. |
Which of the following is not correct regarding terylene?A. Condensation polymerB. Synthetic fibreC. Step growth polymerD. Thermosetting plastic |
| Answer» Correct Answer - D | |
| 78. |
Terylene (Dacron) is the polyeter of:A. Hexamethylenediamine and adipic acidB. Vinyl chloride and formaldehydeC. Melamine and formaldehydeD. Ethylene glycol and terephthalic acid |
| Answer» Correct Answer - D | |
| 79. |
Statement 1:`PDI`(polydispersity index)of natural polymer is unity,while that of syntheric polymer is greater than unity Statement 2:Natural polymers are hemogeneous.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 |
| Answer» Correct Answer - A | |
| 80. |
The `PDI`(polydispersity index) is the ratio of weight to number-average molecular masses`(Mbar(w))//(M(bar(n))` .In natural polymers,which are generally monodispersed,`PDI`is………and in synthetic polymers which are always polydispersed, `PDI` is …….. because `Mbar(w)` is always .......than `Mbar(n)` .A. Greater then`1,1`,higherB. `1`,greater then`1`,higherC. less than `1,1`,lower`1,`less than `1`,lowerD. |
| Answer» Correct Answer - B | |