2025 · Paper 1

Complete GATE XE 2025 Paper 1 overview, original pages and practice · Timed previous-paper practice

Questions 112–114 of 175. Imported answers require review unless explicitly marked reviewed.

Question 112

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Under which combination of conditions does the glass transition of a polymer increase?

Your answerChoose one option.

A.

Increase in molecular weight and increase in plasticizer content

B.

Increase in plasticizer content and decrease in cross-linking

C.

Increase in branching and decrease in inter-chain interactions

D.

Increase in chain length and decrease in plasticizer content

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Question 113

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In a polymer recycling plant, polymer “X” was depolymerized by glycolysis in the presence of ethylene glycol and a suitable catalyst. The glycolysis reaction yielded the following compound:



Identify the polymer “X” from the following options.

Your answerChoose one option.

A.

Poly(ethylene terephthalate)

B.

Polystyrene

C.

Acrylonitrile butadiene styrene

D.

Poly(vinyl chloride)

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Question 114

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Polymer “Z” has a high melting point and it decomposes even before it melts. Hence, it is usually dissolved and subsequently regenerated. Rayon is one such regenerated form. Identify the polymer “Z” from the following options.

Your answerChoose one option.

A.

Urea formaldehyde

B.

Poly(vinyl carbazole)

C.

Cellulose

D.

Poly(vinyl acetate)

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