{"id":84930,"date":"2025-06-01T02:56:22","date_gmt":"2025-06-01T02:56:22","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=84930"},"modified":"2025-06-01T02:56:22","modified_gmt":"2025-06-01T02:56:22","slug":"when-hot-water-is-placed-into-an-empty-water-bottle-the-bottle-keeps","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/when-hot-water-is-placed-into-an-empty-water-bottle-the-bottle-keeps\/","title":{"rendered":"When hot water is placed into an empty water bottle, the bottle keeps"},"content":{"rendered":"

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?<\/p>\n

[amp_mcq option1=”Thermoplastic” option2=”PVC” option3=”Polyurethane” option4=”Thermosetting” correct=”option4″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-1 – 2019<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe question describes a water bottle that retains its shape and does not soften when hot water is placed in it. This property is characteristic of thermosetting plastics. Thermoplastics soften upon heating and can be reshaped, which is why typical PET water bottles deform when exposed to hot liquids. Thermosetting plastics undergo irreversible chemical cross-linking during their formation and remain rigid when heated; they will eventually decompose or char at very high temperatures but do not soften.
\n<\/section>\n
\n– Thermoplastics soften and become pliable upon heating.
\n– Thermosetting plastics remain rigid upon heating.
\n– The bottle not softening with hot water indicates it is not a thermoplastic.
\n<\/section>\n
\nCommon water bottles are made from PET, a thermoplastic. However, if a bottle is designed to withstand hot water without softening, it is likely made from a thermosetting plastic or a specialized high-temperature thermoplastic, but given the options and the definitive statement “does not soften”, thermosetting is the most fitting category. PVC is a thermoplastic, and while some polyurethanes can be rigid, the description points towards the general class of thermosets.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

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? [amp_mcq option1=”Thermoplastic” option2=”PVC” option3=”Polyurethane” option4=”Thermosetting” correct=”option4″] This question was previously asked in UPSC CDS-1 – 2019 Download PDFAttempt Online The question describes a water bottle that … <\/p>\n

Detailed SolutionWhen hot water is placed into an empty water bottle, the bottle keeps<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1087],"tags":[1119,1096,1097],"class_list":["post-84930","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-1","tag-1119","tag-chemistry","tag-polymer","no-featured-image-padding"],"yoast_head":"\nWhen hot water is placed into an empty water bottle, the bottle keeps<\/title>\n<meta name=\"description\" content=\"The question describes a water bottle that retains its shape and does not soften when hot water is placed in it. This property is characteristic of thermosetting plastics. Thermoplastics soften upon heating and can be reshaped, which is why typical PET water bottles deform when exposed to hot liquids. Thermosetting plastics undergo irreversible chemical cross-linking during their formation and remain rigid when heated; they will eventually decompose or char at very high temperatures but do not soften. - Thermoplastics soften and become pliable upon heating. - Thermosetting plastics remain rigid upon heating. - The bottle not softening with hot water indicates it is not a thermoplastic.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/when-hot-water-is-placed-into-an-empty-water-bottle-the-bottle-keeps\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"When hot water is placed into an empty water bottle, the bottle keeps\" \/>\n<meta property=\"og:description\" content=\"The question describes a water bottle that retains its shape and does not soften when hot water is placed in it. This property is characteristic of thermosetting plastics. Thermoplastics soften upon heating and can be reshaped, which is why typical PET water bottles deform when exposed to hot liquids. Thermosetting plastics undergo irreversible chemical cross-linking during their formation and remain rigid when heated; they will eventually decompose or char at very high temperatures but do not soften. - Thermoplastics soften and become pliable upon heating. - Thermosetting plastics remain rigid upon heating. - The bottle not softening with hot water indicates it is not a thermoplastic.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/when-hot-water-is-placed-into-an-empty-water-bottle-the-bottle-keeps\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T02:56:22+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"When hot water is placed into an empty water bottle, the bottle keeps","description":"The question describes a water bottle that retains its shape and does not soften when hot water is placed in it. 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Thermosetting plastics undergo irreversible chemical cross-linking during their formation and remain rigid when heated; they will eventually decompose or char at very high temperatures but do not soften. - Thermoplastics soften and become pliable upon heating. - Thermosetting plastics remain rigid upon heating. - The bottle not softening with hot water indicates it is not a thermoplastic.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/when-hot-water-is-placed-into-an-empty-water-bottle-the-bottle-keeps\/","og_locale":"en_US","og_type":"article","og_title":"When hot water is placed into an empty water bottle, the bottle keeps","og_description":"The question describes a water bottle that retains its shape and does not soften when hot water is placed in it. This property is characteristic of thermosetting plastics. 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