GATE XE Polymer Technology PYQs & Answers — Page 2

Questions 11–17 of 17. Imported answers require independent review unless marked reviewed.

Topic practice 17 questionsPage 2 of 2

Assume that each cross-link produced by vulcanization of polyisoprene contains an average of two sulphur atoms and that the sulphur is present only in the cross-links. If 40% of the isoprene units are cross-linked, the sulphur content in weight percentage is ______ (round off to 2 decimal places).

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match the following rubber additives to their function:

Additive P. Tetramethyl thiuram disulfide Q. Xylyl mercaptan R. Sulfur S. Microcrystalline wax

Function

Peptizer

Antizonant

Accelerator

Cross-linking agent

Your answerChoose one option.

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

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

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

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

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match the following plastic additives to their function:

Additive P. Molybdenum disulfide Q. Glycerol monostearate R. Tribasic lead sulphate S. 2-Hydroxybenzophenone

Function

Heat stabilizer

UV-absorber

Antistatic agent

Solid layer lubricant

Your answerChoose one option.

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

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

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

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

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

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

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

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

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

The filler which would impart electrical conductivity to a polymer is

Your answerChoose one option.

Carbon black

Talc

Glass beads

Calcium carbonate

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

Match the following rubber additives to their function:

Additive P. Dicumyl peroxide Q. Pentachlorothiophenol R. ZnO with stearic acid S. Zinc diethyldithiocarbamate

Function

Ultrafast accelerator

Activator

Curing agent

Peptizer

Your answerChoose one option.

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

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

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

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

You can attempt this question now. Sign in to view the answer key, explanations and discussion.Log in to check answer

GATE XE Polymer Technology PYQs

Question 21

Question 10

Question 14

Question 12

Question 14

Question 102

Question 113