Engineering Sciences
GATE XE Synthesis, manufacturing and properties PYQs
Build your understanding with focused practice from past exam papers.
Questions 11–20 of 35. Imported answers require independent review unless marked reviewed.
Question 113
Open questionXE-FMCQ1 markNeeds review
Nitrile rubber is the copolymer of
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Biaxially oriented poly(propylene) exhibits high clarity because layering of the crystalline structures
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 112
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Consider the structure of a crosslinked polymer shown in the figure. From the options given, identify the monomers that are used in the synthesis of the polymer.
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Lipase is a natural enzyme, which cleaves carboxylic ester bonds. Among the options given, identify the polymer(s) degraded by lipase.
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 123
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Mechanical stress is applied on a polymer. Identify the correct match(es) between the statements (1, 2, 3, 4, 5) that describe the deformations and the regimes (P, Q, R).
P: Rubbery regime
Q: Region around glass transition temperature (T_g)
R: Sample under deformed state
Stress-relaxation takes place and the excess free energy is dissipated
The motions of the molecules are long-range
Segmental motion of the molecules is important
The maximum relaxation time is strongly dependent on the molecular weight
The deformations are independent of the molecular weight and primarily depend on the local structure
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 117
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Which of the following polymers are polyesters?
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Match the following polymers to the most appropriate product
Polymer:
P. Expanded polystyrene
Q. Polyether ketone
R. Polycarbonate
S. Poly(butylene terephthalate)
Product:
Motor bearings
TV cabinet
Sound proof walls
Safety glass
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You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answerQuestion 130
Open questionXE-FNAT2 marksNeeds review
The amount of low molecular weight plasticizer with a
of -60 °C that must be added to nylon 6 to reduce its
from 50 °C to 30 °C is ________ % (round off to nearest integer).Log in to check the answer
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Which one of the following is an elastomer?
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Which one of the following is an example of a biodegradable polymer?
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