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. |
Which of the following polymers can have strong intermolecular forces ?A. NylonB. PolystyreneC. RubberD. Polysters |
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Answer» Correct Answer - A::D Nylon and polyesters have strong intermolecular forces of attractions due to presence of ether H-bonding or dipole dipolioe interactions |
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| 2. |
Vulacanization kaes rubber….. A. more elasticB. soluble in inorganic solventC. crystallineD. more stiff |
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Answer» Correct Answer - A::D In vulcanized rubber, the polymer chains are held tohether by suphur cross- linkages (-s-s-) .These cross links make rubber more hard, elastic and stronger. |
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| 3. |
Which of the following is not semisynthetic polymer?A. cis polysiopreneB. Cellulose nitrateC. Cellulose acetateD. Vulcanised rubber |
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Answer» Correct Answer - A cis - polyisoprene is not a semisynthetic polymer while other three cellulose nitrate cellulose acetate and vucanised rubber are semisyntetic polymer made from cellulose, cellulose and naturaal rubber respectively. |
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| 4. |
Assertion (A) Rayon is a semisynthetic polymer and is taken as a better choice than cotton fabric. Reason (R ) Rayon is a semisynthetic polymer and is taken as a better choice than cotton fabric Reason (R ) Mechanical and aesthetic properties of cellulose can be improved by AcetylationA. Assetion and Reason both are correct statement But reason does not explain AssertionB. Assertion and Reason both are correct statements and Reason explains the Assertion.C. Both assertion and reason are wrong sttement sD. Assertion is correct statement and Reason is worng statement. |
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Answer» Correct Answer - B Assertion and reason both are correct and reason explains the assertion Rayon is semisynthetic polymer and is taken as a better choice than cotton fabric because mechanical and aesthetic properities of cellulose can be inproved by acetylation. |
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| 5. |
Can nucleic acid protein and starch be considered as step growth polymers? |
| Answer» Yes nucleic acid protein and starch can be considered fas step growth polymers as during their polymerisation reaction they lead to removal of water molecule or any neurtal molecule also.Thus, these are the examples of condensation polymers or step growth polymerisation | |
| 6. |
Why should the monomer used in addition polymerisation through free radical pathway be very pure? |
| Answer» During free radical polymerisation, monomers should be very pure because even very trace amounts of impurites may act as inhibitors whgich leads to the formation of polymers with shorter length | |
| 7. |
Why does cis polyisoprene posses elastic porperty? |
| Answer» cis polysoprene is alos known as natural rubber.Its elastic property is due to the existenece of weak van der waals interactions between their varuous polymer chains | |
| 8. |
Assertion (A) Polytetrafluorothene is used in making non stick cookwares. Reason (R ) Fluorine has highest electronegativity.A. Assetion and Reason both are correct statement But reason does not explain AssertionB. Assertion and Reason both are correct statements and Reason explains the Assertion.C. Both assertion and reason are wrong sttement sD. Assertion is correct statement and Reason is worng statement. |
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Answer» Correct Answer - a Assertion and reason both are correct but reason does not explain assetion polytetrafluoroethen (teflon) is used in making non stick cookwares because it is chemically inert, thermally stable and resistant to attack by corrosive reagents. |
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| 9. |
Identify the type of polymer -A-B-B-A-A-A-B-A- |
| Answer» Copolymer as it contains more than one type of monomer units. Here,A and B are two types of monomer units | |
| 10. |
Identify the type of polymer -A-A-A-A-A-A- |
| Answer» Homopolymer as it contains only one type of monomer units i.e only A monomer units | |