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Which of the following can be repeatedly soften on heating?
(i) Polystyrene
(ii) Melamine
(iii) Polyesters
(iv) Polyethylene
(v) Neoprene
  • a)
    (i) and (iii)
  • b)
    (i) and (iv)
  • c)
    (iii), (iv) and (v)
  • d)
    (ii) and (iv)
Correct answer is option 'B'. Can you explain this answer?
Most Upvoted Answer
Which of the following can be repeatedly soften on heating?(i) Polysty...
Polystyrene and polyethylene belong to the category of thermoplastic polymers which are capable of repeatedly softening on heating and harden on cooling.
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Which of the following can be repeatedly soften on heating?(i) Polysty...
Repeating Softening on Heating in Polymers

Polymers that can be repeatedly softened on heating are:
- Polystyrene
- Polyesters

Explanation:
Polystyrene and polyesters are examples of thermoplastic polymers that can be repeatedly softened on heating. Thermoplastic polymers have linear or branched structures that allow them to soften when heated and solidify when cooled, making them suitable for processes like injection molding and extrusion.

Polystyrene:
Polystyrene is a widely used thermoplastic polymer that softens on heating and solidifies on cooling. It can be melted and reshaped multiple times without undergoing any chemical changes.

Polyesters:
Polyesters are another category of thermoplastic polymers that exhibit the property of repeated softening on heating. They are commonly used in textiles, packaging, and other applications where their ability to be reshaped is advantageous.
Therefore, the correct answer is option (i) and (iii) as both polystyrene and polyesters can be repeatedly softened on heating due to their thermoplastic nature.
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Which of the following can be repeatedly soften on heating?(i) Polystyrene(ii) Melamine(iii) Polyesters(iv) Polyethylene(v) Neoprenea)(i) and (iii)b)(i) and (iv)c)(iii), (iv) and (v)d)(ii) and (iv)Correct answer is option 'B'. Can you explain this answer?
Question Description
Which of the following can be repeatedly soften on heating?(i) Polystyrene(ii) Melamine(iii) Polyesters(iv) Polyethylene(v) Neoprenea)(i) and (iii)b)(i) and (iv)c)(iii), (iv) and (v)d)(ii) and (iv)Correct answer is option 'B'. Can you explain this answer? for JEE 2025 is part of JEE preparation. The Question and answers have been prepared according to the JEE exam syllabus. Information about Which of the following can be repeatedly soften on heating?(i) Polystyrene(ii) Melamine(iii) Polyesters(iv) Polyethylene(v) Neoprenea)(i) and (iii)b)(i) and (iv)c)(iii), (iv) and (v)d)(ii) and (iv)Correct answer is option 'B'. Can you explain this answer? covers all topics & solutions for JEE 2025 Exam. Find important definitions, questions, meanings, examples, exercises and tests below for Which of the following can be repeatedly soften on heating?(i) Polystyrene(ii) Melamine(iii) Polyesters(iv) Polyethylene(v) Neoprenea)(i) and (iii)b)(i) and (iv)c)(iii), (iv) and (v)d)(ii) and (iv)Correct answer is option 'B'. Can you explain this answer?.
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