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प्रश्न
A polymer which becomes soft on heating and hard on cooling, belongs to class of ______.
विकल्प
fibers
thermosetting polymer
elastomer
thermoplastic polymer
MCQ
रिक्त स्थान भरें
उत्तर
A polymer which becomes soft on heating and hard on cooling, belongs to class of thermoplastic polymer.
Explanation:
Thermoplastics are a type of polymer that softens when heated and hardens when cooled. When these polymers are heated, they soften and can be moulded into various shapes, such as polyethene, polystyrene, and so on.
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Classification of Polymers
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