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NEET • CHEMISTRY • POLYMERS

Polymers practice · Mixed difficulty

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Showing 61-90 of 99 questions

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61 Easy
61 of 99
Remembering +4 | -1
Rayon is
View answer and explanation
Correct option: C
Regenerated fibre
Option C (Regenerated fibre) is correct because rayon is made from cellulose that has been chemically processed and reformed.
62 Medium
62 of 99
Analyzing +4 | -1
Assertion: Branched polymers have higher tensile strength than linear polymers.

Reason: The intermolecular force of attraction in linear polymer is more than that in branched polymers.
View answer and explanation
Correct option: D
Assertion is wrong, but reason is correct statement.
Option D is correct because branched polymers have lower tensile strength due to weaker intermolecular forces compared to linear polymers.
63 Easy
63 of 99
Remembering +4 | -1
Polymer obtained by condensation polymerisation is:
View answer and explanation
Correct option: D
Nylon-6, 6
Option D is correct because Nylon-6,6 is formed through condensation polymerization, where a small molecule like water is eliminated during the process.
64 Medium
64 of 99
Remembering +4 | -1
The polymer obtained by condensation of sebacic acid and hexamethylenediamine is named as
View answer and explanation
Correct option: A
Nylon-6
Option D is correct because Nylon-6,10 is formed from hexamethylenediamine (6 carbons) and sebacic acid (10 carbons).
65 Medium
65 of 99
Application +4 | -1
A polymer consist of 8 atoms of sulphur per molecule which is 2%2 \% by mass, The molar mass of the polymer is
View answer and explanation
Correct option: B
12800 g mol−112800 \mathrm{~g} \mathrm{~mol}^{-1}
Option B (12800 g mol−112800 \mathrm{~g} \mathrm{~mol}^{-1}) is correct because if 8 sulfur atoms constitute 2% of the polymer's mass, then the total molar mass can be calculated.
66 Medium
66 of 99
Understanding +4 | -1
Which statement regarding polymers is not correct?
View answer and explanation
Correct option: A
Thermosetting polymers are reusable
Option A (Thermosetting polymers are reusable) is correct because thermosetting polymers undergo irreversible changes upon heating and cannot be remelted or reshaped.
67 Easy
67 of 99
Remembering +4 | -1
Thermoplastics are:
View answer and explanation
Correct option: D
All of the above
Option D is correct because thermoplastics are linear polymers that soften upon heating and can be molded into desired shapes.
68 Hard
68 of 99
Remembering +4 | -1
Nylon-6, 10 is a polymer of:
View answer and explanation
Correct option: B
Hexamethylene and sebacic acid
Option B (Hexamethylene and sebacic acid) is correct because Nylon-6,10 is a polymer formed from hexamethylenediamine and sebacic acid.
69 Medium
69 of 99
Remembering +4 | -1
The polymer which has conducting power is
View answer and explanation
Correct option: D
Polyacetylene
Option D (Polyacetylene) is correct because polyacetylene can be doped to become a conducting polymer.
70 Easy
70 of 99
Remembering +4 | -1
Which one among the following is a thermosetting plastic?
View answer and explanation
Correct option: C
Bakelite
Option C is correct because Bakelite is a thermosetting plastic that undergoes irreversible hardening upon heating.
71 Easy
71 of 99
Remembering +4 | -1
Natural rubber is a polymer of:
View answer and explanation
Correct option: B
ciscis-isoprene
Option B (ciscis-isoprene) is correct because natural rubber is a polymer formed from the cis-isoprene monomer.
72 Easy
72 of 99
Remembering +4 | -1
Which of the following is biodegradable polymer?
View answer and explanation
Correct option: C
PHBV
The correct answer is C (PHBV) because PHBV (Polyhydroxybutyrate-co-hydroxyvalerate) is a biodegradable polyester produced by microorganisms.
73 Medium
73 of 99
Understanding +4 | -1
Identify the pair of condensation polymers from the following
View answer and explanation
Correct option: B
Terylene and Nylon – 6, 6
Option B (Terylene and Nylon – 6, 6) is correct because both are formed through condensation reactions, eliminating small molecules.
74 Medium
74 of 99
Remembering +4 | -1
Which of the following is polycarbonate?
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Correct option: B
Lexan
Option B is correct because Lexan is a polycarbonate, known for its strength and impact resistance.
75 Medium
75 of 99
Understanding +4 | -1
Polyvinyl alcohol can be prepared by
View answer and explanation
Correct option: B
Alkaline hydrolysis of polyvinyl acetate
Option B (Alkaline hydrolysis of polyvinyl acetate) is correct because polyvinyl alcohol is synthesized by hydrolyzing polyvinyl acetate.

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CHEMICAL BONDING & MOLECULAR STRUCTURE 595 MCQs THERMODYNAMICS 583 MCQs STRUCTURE OF ATOM 499 MCQs CLASSIFICATION OF ELEMENTS AND PERIODICITY IN PROPERTIES 429 MCQs Equilibrium 412 MCQs STATES OF MATTER 410 MCQs
76 Easy
76 of 99
Remembering +4 | -1
Which of the following is currently used as a true cord?
View answer and explanation
Correct option: D
Nylon-6
Option D is correct because Nylon-6 is commonly used as tire cord due to its high tensile strength and elasticity.
77 Medium
77 of 99
Understanding +4 | -1
Natural rubber is not used in making footwear for polar regions because
View answer and explanation
Correct option: B
Natural rubber becomes brittle at temperature lower than 10∘C.10^\circ \mathrm{C}.
Option B is correct because natural rubber becomes brittle at low temperatures, making it unsuitable for footwear in polar regions.
78 Medium
78 of 99
Understanding +4 | -1
Which of the following pairs is not correctly matched?
View answer and explanation
Correct option: B
Teflon-thermally stable cross linked polymer of phenol and formaldehyde
Option B (Teflon-thermally stable cross linked polymer of phenol and formaldehyde) is not correctly matched because Teflon is a polymer of tetrafluoroethylene, while cross-linked polymers of phenol and formaldehyde are Bakelite.
79 Easy
79 of 99
Understanding +4 | -1
Which is/are true for elastomers?
View answer and explanation
Correct option: D
All of the above
Option D (All of the above) is correct because all the statements accurately describe the properties of elastomers.
80 Medium
80 of 99
Understanding +4 | -1
Which of the following practices involves green chemistry?

(i) Substitute CFCsCFCs by environmental friendly HFCsHFCs and other compounds

(ii) Replace halogenated solvent by liquid CO2{CO}_2 for drycleaning

(iii) Use of H2O2{H}_2 {O}_2 for bleaching instead of Cl2{Cl}_2

(iv) Making disposable eating utensils and storage jars of plastics
View answer and explanation
Correct option: D
(i),(ii) and (iii)
Option D ((i),(ii) and (iii)) is correct because all three practices reduce environmental harm by using safer alternatives.
81 Easy
81 of 99
Remembering +4 | -1
Symbolic name for Teflon is:
View answer and explanation
Correct option: A
PTFE\mathrm{PTFE}
Option A is correct because PTFE stands for Polytetrafluoroethylene, which is the chemical name for Teflon.
82 Easy
82 of 99
Understanding +4 | -1
On the basis of their mode of formation, the polymers can be classified as
View answer and explanation
Correct option: D
Both addition and condensation polymers
Option D (Both addition and condensation polymers) is correct because polymers are classified based on their mode of formation into addition and condensation polymers.
83 Easy
83 of 99
Understanding +4 | -1
Which of the following statement about Nylon-2-nylon-6 is incorrect?
View answer and explanation
Correct option: C
Nylon-2-nylon-6 is a non-biodegradable polymer
Option C (Nylon-2-nylon-6 is a non-biodegradable polymer) is correct because Nylon-2-nylon-6 *is* a biodegradable polymer.
84 Medium
84 of 99
Remembering +4 | -1
Buna –N- synthetic rubber is a copolymer of
View answer and explanation
Correct option: C
H2C=CH−CN  and  H2C=CH−CH=CH2{\mathrm{H}_2}\mathrm{C} = \mathrm{CH} - \mathrm{CN\;and\;}{\mathrm{H}_2}\mathrm{C} = \mathrm{CH} - \mathrm{CH} = \mathrm{C}{\mathrm{H}_2}
Option C (H2C=CH−CN  and  H2C=CH−CH=CH2{\mathrm{H}_2}\mathrm{C} = \mathrm{CH} - \mathrm{CN\;and\;}{\mathrm{H}_2}\mathrm{C} = \mathrm{CH} - \mathrm{CH} = \mathrm{C}{\mathrm{H}_2}) is correct because Buna-N rubber is a copolymer of 1,3-butadiene and acrylonitrile.
85 Easy
85 of 99
Understanding +4 | -1
Assertion: PHBV is used for making orthopaedic devices.

Reason: PHBV is a biodegradable polymer.
View answer and explanation
Correct option: A
Both assertion and reason are correct statements, and reason is the correct explanation of the assertion.
Option A (Both assertion and reason are correct statements, and reason is the correct explanation of the assertion) is correct because PHBV is used in orthopaedic devices due to its biodegradability.
86 Easy
86 of 99
Remembering +4 | -1
Acetate rayon is prepared from:
View answer and explanation
Correct option: D
Cellulose
Option D is correct because acetate rayon is a modified cellulose fiber, produced by treating cellulose with acetic anhydride.
87 Easy
87 of 99
Remembering +4 | -1
Which of the following is not a cellulose product?
View answer and explanation
Correct option: D
Dacron
Option D is correct because Dacron is a polyester, while gun cotton, celluloid, and rayon are cellulose derivatives.
88 Easy
88 of 99
Understanding +4 | -1
From the given statements, which one is not true?
View answer and explanation
Correct option: D
Chlorophyll is a polymer
Option D (Chlorophyll is a polymer) is correct because chlorophyll is a pigment molecule, not a polymer.
89 Medium
89 of 99
Remembering +4 | -1
A process that involves the union of two or more molecules to form a new molecular aggregate without losing any simple molecule is known as:
View answer and explanation
Correct option: B
Polymerisation
Option B (Polymerisation) is correct because polymerization is the process of joining monomers to form a polymer without losing small molecules.
90 Medium
90 of 99
Understanding +4 | -1
Assertion:- Bakelite is a thermosetting polymer.

Reason:- It has highly branched structure.
View answer and explanation
Correct option: B
If both assertion & reason true but reason is not a correct explanation of the assertion
Option B (If both assertion & reason true but reason is not a correct explanation of the assertion) is correct because Bakelite is thermosetting and has a branched structure, but the branching isn't the *direct* cause of it being thermosetting.
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