GATE XE 2026 Paper 1 — page 43

Questions 127–129 of 197. Imported answers require review unless explicitly marked reviewed.

A certain amount of plasticizer with a glass transition temperature (T_g) of −50 °C was added to a polymer to reduce its T_g from 70 °C to 30 °C. Using the Fox equation, the weight fraction of the plasticizer used is ______________ (rounded off to two decimal places).

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A rectangular plastic specimen with a cross-sectional area of 240 mm

is subjected to tension with a force of 1500 N resulting in elastic deformation. If the Young’s modulus of the specimen is 34.55 MPa, the value of strain is ______________ (rounded off to two decimal places).

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Equimolar mixture of terephthalic acid and butylene glycol was taken to synthesize a polyester. The reaction was stopped at 99.6% conversion of the acid monomer. The weight average molecule weight (

) of the synthesised polyester is ______________ g/mol (rounded off to the nearest integer).

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2026 · Paper 1

Question 127

Question 128

Question 129