InterviewSolution
Saved Bookmarks
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.
| 651. |
Synthetic human hair wigs are made from a copolymer of vinyl chloride and acrylonitrile, and is called:A. PVCB. polyacrylonitrileC. celluloseD. dynel |
|
Answer» Correct Answer - D |
|
| 652. |
Synthetic human hair wigs are made from a copolymer of vinyl chloride and acrylonitrile, and is called:A. PVCB. PolyacrylonitriteC. CelluloseD. Dynel |
|
Answer» Correct Answer - D Uses of polymer . |
|
| 653. |
What does the following polymers stand for ? (i) PVC (ii) DOP(iii) PAN |
|
Answer» (1) Polyvinylchloride (2) Dioctylphthalate (3) Polyacrylonitrile |
|
| 654. |
PVC is commonly used to make pipes.1. What is the monomer of PVC?2. What is the purpose of PVC covering of electrical connecting wire? |
|
Answer» 1. Vinyl chloride 2. To provide electrical insulation. |
|
| 655. |
Which of the following is the structure of squanil?A. `H_(2)N-overset(O)overset(||)C-O-CH_(2)-overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-CH_(2)-O-overset(O)overset(||)C-NH_(2)`B. C. `H_(2)N-overset(O)overset(||)C-O-CH_(2)-overset(CH_(3))overset(|)underset((CH_(2))_(2)CH_(3))underset(|)C-CH_(2)-O-overset(O)overset(||)C-NH_(2)`D. None of the above |
|
Answer» Correct Answer - A `H_(2)N-overset (O)overset(||)C-O-CH_(2)-underset"Equanil"overset(CH_(3))overset(|)underset(CH_(3))underset(|)C-CH_(2)-O-overset(O)overset(||)C-NH_(2)` |
|
| 656. |
The catalyst used for olefin polymerisation isA. Ziegler-Natta catalystB. Raney-nickal catalystC. Wilkinson catalystD. Merrified resin |
|
Answer» Correct Answer - A Ziegler-Natta catalyst `[TiCl_(4) + Al(C_(2)H_(5))_(3)]` is used as a catalyst in the polymerisation of olafins. |
|
| 657. |
Which of the following statements is not true about the drug barbital ?A. It is used in sleepin pillsB. It is a non-hypnotic drugC. It is trauquilliserD. It causes addiction |
|
Answer» Correct Answer - B Barbital is a sleep-producing drug , i.e. hypnotic tranquiliser. If causes addiction . |
|
| 658. |
The catalyst used for olefin polymerization is:A. Ziegler-Nana catalystB. Wilkinson catalystC. Raney nickel catalystD. Merrifield resin |
| Answer» Correct Answer - A | |
| 659. |
(i) Give an example of a synthetic rubber. (ii) Mention main advantage of synthetic rubber. (iii) Arrange the polymers in the increasing order of tensile strength, Nylon‐6, Buna‐S,Polythene. |
|
Answer» (i) synthetic rubber is Buna‐S (ii) It is used for making oil seals, (iii) Buna‐S<Polythene< Nylon‐6 |
|
| 660. |
Glyptal polymer is obtained from glycerol on reacting with:A. malonic acidB. glycerolC. maleic acidD. ethylene glycol |
| Answer» Correct Answer - B::D | |
| 661. |
Polymers are also referred to asA. micromoleculesB. small moleculesC. macromoleulesD. hug molecules |
|
Answer» Correct Answer - C Macromolecules is another term used to define polymers. |
|
| 662. |
The correct classification of polymers based on moleclar forces isA. elastomers, fibres and the thermosetting polymersB. elastomers, fibres, themoplastic and thermosetting polymersC. homopolymers and copolymersD. None of the above |
|
Answer» Correct Answer - B Polymers can be classified on the basis of molecular forces as elestomers, fibres, thermoplastic and thermosetting polymers. |
|
| 663. |
Differentiate between the following pairs of polymers based on the property mentioned against each : (i) Novolac and Bakelite (Structure) (ii) Buna-S and Terylen (Intermolecular forces). |
|
Answer» (i) Novaloc is a linear polymer while bakelite is highly cross-linked polymer. The monomer units in both of them are phenol and formaldehyde. (ii) Buna-S is an elastomer in which attractive forces are quite weak. Terylene is a fibre with strong intermolecular attractive forces present. |
|
| 664. |
Find the odd oneA. polychloropreneB. polyisopreneC. nitrile rubberD. thiokol rubber |
|
Answer» Correct Answer - D Thiokol rubber is the odd one. All the other ones are polydienes. |
|
| 665. |
Caprolactum is used to prepare which of the following polymer?A. MalamineB. Nylon-6C. nylon-66D. PMMA |
|
Answer» Correct Answer - B Nylon-6 is obtained by the polymerisation of caprolactam . |
|
| 666. |
Write the names of monomers of the following polymers : |
|
Answer» (i) Hexamethylene diamine `NH_(2)-(CH_(2))6NH_(2)` and adipic acid `HOOC - (CH_(2))_(4)-COOH` (ii) Caprolactum (iii) Tetrafluroethene `F_(2)C=CF_(2)`. |
|
| 667. |
Natural silk isA. polypeptideB. PolyacrylateC. PolyesterD. Polysaccharide |
| Answer» Correct Answer - A | |
| 668. |
Nylon-6 , 6 polymer is correctly represented asA. `[-NH - (CH_(2))_(6) - NH - overset(O)overset(||)(C) - (CH_(2))_(6) - overset(O)overset(||)(C)]_(n)`B. `[ -overset(O)overset(||)(C) - (CH_(2))_(4) - overset(O)overset(||)(C)- NH-(CH_(2))_(4) -NH]_(n)`C. `[-NH - (CH_(2))_(4) - NH - overset(O)overset(||)(C)- (CH_(2))_(6) - overset(O)overset(||)(C) -]_(n)`D. `[-overset(O)overset(||)(C) - (CH_(2))_(4) - overset(O)overset(||)(C) - NH - (CH_(2))_(6) - NH]_(n)` |
| Answer» Correct Answer - D | |
| 669. |
Bakelite is mado from phenol and fomaldehyde. The initial reaction between them is the exampla ofA. electrophilic aromatic additionB. nucleophilic aromatic substitutionC. free radical reactionD. aldol reaction |
|
Answer» Correct Answer - A The reaction of phenol and formaldehyde, is called Lederer Mannass reaction. It follows electrophilic addition and rearrangement mechanism. |
|
| 670. |
Natural silk is aA. polyesterB. PolyamideC. PolyacidD. Polysaccharide |
|
Answer» Correct Answer - B Natural is protein fibrous which contains polyamide linkage. |
|
| 671. |
What type of polymer is represented by the following segment ? `-overset(O)overset(||)C-CH_2CH_2-overset(O)overset(||)C-OCH_2CH_2CH_2O-`A. polyamide fibresB. PolyesterC. PolyolefinD. Polyethylene |
|
Answer» Correct Answer - B The given sagment has the ester linkage, -COO- therefore , the polymer is a polyester . |
|
| 672. |
Draw the names and the structures of the following polymers:(1) Polythene(2) PVC(3) Teflon |
||||||||
Answer»
|
|||||||||
| 673. |
`CH_2 = CH_2` is aA. MonomerB. PolymerC. IsomerD. Equimer |
|
Answer» Correct Answer - A It is a monomer of polyethene |
|
| 674. |
Which one of the following can be used as monomer in a polymerisation reaction ?A. `CH_3CH_2Cl`B. `CH_3CH_2OH`C. `C_6H_6`D. `C_3H_6` |
|
Answer» Correct Answer - D `C_(3)H_(6)` has a double bond and linear molecule hence polymerises easily. |
|
| 675. |
Which one of the following can be used as monomer in a polymerisation reaction ?A. `CH_(3) CH_(2) Cl`B. `CH_(3)CH_(2)OH`C. `C_(6)H_(6)`D. `C_(3)H_(6)` |
| Answer» Correct Answer - D | |
| 676. |
Phenol is used in the manufacture of:A. BakeliteB. PolystyreneC. NylonD. PVC |
| Answer» Correct Answer - A | |
| 677. |
Hexamethylene diammonium adipate isA. `H_(3)N- (CH_(2))_(6) - NH_(3) OOC(CH_(2))_(4) COO`B. `H_(3) N^(+) - (CH_(2))_(6) - NH_(3) ""^(+) OOC (CH_(2))_(4) - COOH`C. `H_(3) N^(+) - (CH_(2))_(6) - N^(+) H_(3)COO ^(-) - (CH_(2))_(4) COO^(-)`D. `H_(3)N- (CH_(2))_(6) - NH_(3) COO^(-) - (CH_(2))_(4) COO^(-)` |
| Answer» Correct Answer - C | |
| 678. |
Which of the following polymers have vinylic monomer unitsA. acrilanB. polystyreneC. nylonD. teflon |
| Answer» Correct Answer - A::B::D | |
| 679. |
What is the reason of crystalline structure of nylon? |
| Answer» Nylons are polyamides as they consist of amide groups `(-NHCO-)` in their backbone chains. As amide groups are highly polar , their presence in polymeric chains lead to the formation of intermolecular hydrogen bonds between adjacent chains, thereby holding the chains together tightly. The polymeric chains of nylons are usually linear and symmetrical . Because of the strong forces of attraction due to hydrogen bonding between the symmetrical chains of nylons, they are aligned in a regular and ordered arrangement. This makes nylons crystalline in nature . | |
| 680. |
Which polymer is used in making laminated sheet? What is the name of monomer of this polymer? |
|
Answer» First part : LDPE . Second part : Ethylene |
|
| 681. |
Why does cis-polyisoprene exhibit elasticity ?A. it is soft and soluble in no - polar solventB. it is unsaturated and porousC. it has a coled stucture and chains held together by weak van der Waals forcesD. it has a fibrous sturcture and reactive sites at various double bonds. |
| Answer» Correct Answer - C | |
| 682. |
Heating rubber with sulphur is known asA. galvanisationB. bessmerisationC. vulcanisationD. sulphonation . |
| Answer» Correct Answer - C | |
| 683. |
Name a biodegradable and a non-biodegradable polymer. |
| Answer» Biodegradable: polylactic acid, non-biodegradable: polyethylene | |
| 684. |
____ is the monomer of teflon |
| Answer» Correct Answer - Tetrafluoroethylene | |
| 685. |
Resole is prepared by the action of phenol and formaldehyde in the presence of ____ as a catalyst. |
| Answer» Correct Answer - alkali | |
| 686. |
Which of the following staement(s) is/are correct regarding vitamins?A. They are designated by A, B, C and D.B. Thet are further named as `B_(1)`, `B_(2)`, `B_(6)` and `B_(12)`…..C. Vitamin pills should not be taken without the advice of doctorD. All fo the above |
|
Answer» Correct Answer - D Vitamins are deslgnated by alphabets A, B, C, D,. Some of them are further named as sub-groups, e.g. `B_(1)` , `B_(2)`, `B_(6)` and `B_(12)` etc . Excess of vitamins is also hacmful and vitamin pills should not be taken without the advice of doctor, |
|
| 687. |
Consider the following structure. It is the structure ofA. penicillin KB. penicillin VC. penicillin GD. chloramphenicol |
|
Answer» Correct Answer - C The given structure is of penicillin G. |
|
| 688. |
Which statement about aspirin is not true?A. Aspirin belongs to narcotic analgesicsB. It is effective in rilieving painC. It has antiblood clotting actionD. It is a neurologically active drug |
|
Answer» Correct Answer - A Aspirin is a non-narcotic drug. |
|
| 689. |
Which of the following hormones is responsible for the growth of animals ?A. AuxinB. InsulinC. AdrenalineD. Somatotropin |
|
Answer» Correct Answer - D Somatotropin is the hormone , secrted by anterior lobe of pituitary gland .It is also called growth hormone as it stinmulates protein-symthesis , glycogensis and some other biological activities . Its deficiency causes midgets or dwarfism . |
|
| 690. |
Which of the following is present in DNA?A. DeoxyriboseB. starchC. RlboflavinD. None of these |
|
Answer» Correct Answer - A The sugar present in DNA is 2-deoxyribose while that present in RNA is a base. |
|
| 691. |
Chloraming - T is a/anA. antisepticB. disinfectantC. analgasicD. antipyretic |
|
Answer» Correct Answer - A Antiseptic drugs cause destruction of micro -organisms, which produce septic diseases , e.g. dettol, savion aeriflavin , iodofom and some dyes such as chloramine -T, methylene blue. |
|
| 692. |
Difference in the antiseption and disinfecants isA. Antiseptics are used against micro-organisms which disinfectants are used against insectsB. antiseptics are used over skin while disinfants can be taken orally alsoC. antiseptics merely inhibit the growth and disinfectant kill the micro-organismsD. antiseptics are used over living tissues while disinfectants cannot be used over living tissues |
|
Answer» Correct Answer - D Antiseptics are used over living tissues whlie disinfectants used for inanimate objects such as floors, toilets, instrumenta etc. |
|
| 693. |
Which of the following have transition metal?A. HaemoglobinB. ChlorophyllC. InsulinD. Vitamin `B_(1)` |
|
Answer» Correct Answer - B Chlorophyll contains Mg. |
|
| 694. |
Chloramphenicol is used in the treatment ofA. typhoidB. malariaC. acidityD. tuberculosis |
|
Answer» Correct Answer - A It is effective in treatmant of typhoid. |
|
| 695. |
Molecular masses of drugs lie in the range ofA. `~ 5u - 10 u`B. `~ 50u - 60u`C. `~100u - 500u`D. Above 2000u |
|
Answer» Correct Answer - C Molecular masses of drugs lie in the range of `~100u = 500u`. |
|
| 696. |
Aresnic drugs are mainly used in the treatment ofA. jaundiceB. typholdC. syphilisD. cholera |
|
Answer» Correct Answer - C Arsenic drugs, also called arsenical (like atoxyl,salvarson, neoarsphenamine etc) are mainly used in sleeping sickness, syphillis etc. |
|
| 697. |
The pH value of gasfric juice in humna stomach is about 1.8 and in intiestine , it is about 7.8. The `pk_(a)` value of aspirin is 3.5 Aspirin will beA. ionised in the small intestine and almost unionised in the stomachB. unionised in the small intestine and in the stomachC. completelyl ionised in the small intestine and in the stomachD. ionised in the stomach and almost unionised in the amall intestine |
|
Answer» Correct Answer - A Aspirin is a moderate acid (`pk_(a) = 3.5 `) hence it is almost unionised in stomach due to its strong acidie medium because of HCl. It is due to common ion effect while in small intestine, the medium is alkaline, hence aspirin will be sufficiently ionised in small intestine. |
|
| 698. |
Compound which is added to soap to impart antiseptic properties isA. sodium lauryl sulphateB. sodium dodecyibenzene sulphonateC. rosinD. bithioal |
|
Answer» Correct Answer - D Bithional impart antiseptic property to soap. |
|
| 699. |
Mention the difference between Buna-S and Buna-N. |
|
Answer» Buna-S is a copolymer of styrene `(PhCH=CH_2)` and butadiene `(H_2C-CH-CH=CH_2)` whereas Buna-N is a copolymer of butadiene `(H_2C=CH-CH=CH_2)` and acrylonitrile `(H_2C=CH-CN)` `underset"Buna-S"([--H_2C-CH=CH-CH_2-CH_2-underset"Ph"underset|CH--]_n)` `underset"Buna-N"([--H_2C-CH=CH-CH_2-CH_2-underset"CN"underset|CH--]_n)` |
|
| 700. |
What is bakelite? Distinguish between novolac and resole. |
| Answer» Second part : Novolac is a straight chain polymer whereas resole is a branched polymer | |