GATE XE kind:question PYQs & Answers — Page 155

Questions 1541–1550 of 1772. Imported answers require independent review unless marked reviewed.

Topic practice 1772 questionsPage 155 of 178

Match the following:


P. Butyl rubber	1. Metallocene polymerization
Q. Cold SBR	2. Cationic polymerization
R. Poly(ethylene terephthalate)	3. Redox polymerization
S. Polypropylene	4. Condensation polymerization

Your answerChoose one option.

P-3; Q-1; R-2; S-1

P-2; Q-3; R-1; S-4

P-4; Q-3; R-1; S-2

P-2; Q-3; R-4; S-1

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Match the following:


P. Polyaramid	1. Baby-feeding nipple
Q. Polytetrafluoroethylene	2. Optical glasses
R. Polycarbonate	3. Non-stick cookware
S. Poly(dimethyl siloxane)	4. Bullet-proof jacket

Your answerChoose one option.

P-4; Q-3; R-2; S-1

P-2; Q-3; R-4; S-1

P-4; Q-1; R-2; S-3

P-3; Q-4; R-2; S-1

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Flexble PVC tubes are used for watering. If some organic solvents are passed through this tube, it becomes stiff. This is due to the fact that the organic solvents

Your answerChoose one option.

plasticize PVC and raise

remove plasticizer and raise

remove plasticizer and lower

react with PVC and increase

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Match the following:


P. Plastic egg container	1. Injection molding
Q. Water tank	2. Extrusion
R. Chair	3. Rotational moulding
S. Cable	4. Thermoforming

Your answerChoose one option.

P-3; Q-1; R-4; S-2

P-4; Q-3; R-2; S-1

P-2; Q-3; R-4; S-1

P-4; Q-3; R-1; S-2

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Match the following:


P. Flame retardant	1. 4-Methyl-2,6-di-t-butyl phenol
Q. UV absorber	2. Azocarbonamide
R. Blowing agent	3. Phenyl salisylate
S. Antioxidant	4. Aluminium trihydrate

Your answerChoose one option.

P-4; Q-1; R-2; S-3

P-4; Q-3; R-2; S-1

P-3; Q-4; R-2; S-1

P-2; Q-4; R-1; S-3

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A plot of strain (%) versus time of a polymer is given below. Based on this plot and the properties as mentioned below, find out the correct combination.

Diagram for Engineering Sciences question 15

1 = Viscoelastic deformation; 2 = Elastic deformation 3 = Viscoelastic recovery; 4 = Elastic recovery

Your answerChoose one option.

P-1; Q-4; R-2; S-3;

P-2; Q-3; R-4; S-1

P-3; Q-1; R-2; S-4

P-2; Q-1; R-4; S-3

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The plot shows apparent viscosity versus shear rate of Newtonian, Dilent and Pseudoplastic fluids. Based on this plot and the fluid behavior as mentioned below, find out the correct combination.

Diagram for Engineering Sciences question 16

1 = Dilent fluid; 2 = Newtonian fluid; 3 = Pseudoplastic fluid

Your answerChoose one option.

P-1; Q-2; R-3

P-3; Q-1; R-2

P-2; Q-3; R-1

P-2; Q-3; Q-1

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Plot of the modulus versus temperature of different types of polymers is given below. Based on this plot and the nature of the polymers as mentioned below, find out the correct combination.

Diagram for Engineering Sciences question 17

1 = An amorphous polymer of high molecular weight having entanglements 2 = An amorphous polymer of moderate molecular weight 3 = Highly crosslinked polymer 4 = Semi-crystalline polymer

Your answerChoose one option.

P-2; Q-1; R-3; S-4

P-1; Q-2; R-3; S-4

P-2; Q-1; R-4; S-3

P-1; Q-3; R-4; S-2

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The

of homopolymers of A and B are +100 °C and −70 °C respectively. The

of a random copolymer of A and B having 40 wt% A and 60 wt% B is _______ °C.

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The number average molecular weight of a polymer prepared from HO(CH

)

COOH is 24,000 g/mol. The conversion of the monomer required to reach the above molecular weight is________%. (C = 12, H = 1, O = 16 g/mol).

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GATE XE kind:question PYQs

Question 10

Question 11

Question 12

Question 13

Question 14

Question 15

Question 16

Question 17

Question 18

Question 19