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UPSC CDS Science Chemistry Questions Part 1
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Question : 1
Total: 100
When hot water is placed into an empty water bottle, the bottle keeps its shape and does not soften. What type of plastic is the water bottle made from?
[2019 CDS-I]
Thermoplastic
PVC
Polyurethane
Thermosetting
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Solution:
A thermosetting plastic is a polymer that is irreversibly hardened by curing prepolymer or resin. When hot water is placed into an empty water bottle, the bottle keeps its shape and does not soften because of its irreversible hardening property.
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