{"id":86732,"date":"2025-06-01T04:19:39","date_gmt":"2025-06-01T04:19:39","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=86732"},"modified":"2025-06-01T04:19:39","modified_gmt":"2025-06-01T04:19:39","slug":"at-atmospheric-pressure-the-density-of-water-is-maximum-at-a-temperat","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/at-atmospheric-pressure-the-density-of-water-is-maximum-at-a-temperat\/","title":{"rendered":"At atmospheric pressure, the density of water is maximum at a temperat"},"content":{"rendered":"

At atmospheric pressure, the density of water is maximum at a temperature of:<\/p>\n

[amp_mcq option1=”0 \u00b0C” option2=”4 \u00b0C” option3=”-4 \u00b0C” option4=”1 \u00b0C” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC Geoscientist – 2020<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nAt atmospheric pressure, the density of water is maximum at a temperature of 4 \u00b0C. This is due to the anomalous expansion of water. As water is heated from 0 \u00b0C to 4 \u00b0C, it contracts (density increases), unlike most substances which expand upon heating. Above 4 \u00b0C, water expands normally upon heating (density decreases). Conversely, when water is cooled from higher temperatures, its density increases until it reaches a maximum at 4 \u00b0C, and then decreases as it is cooled from 4 \u00b0C to 0 \u00b0C (it expands upon freezing at 0 \u00b0C).
\n<\/section>\n
\nWater exhibits anomalous expansion, reaching its maximum density at 4 \u00b0C.
\n<\/section>\n
\nThis peculiar property of water is crucial for aquatic life in cold climates, as the densest water (at 4 \u00b0C) settles at the bottom of lakes and ponds, preventing them from freezing solid from top to bottom and allowing aquatic organisms to survive through the winter.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

At atmospheric pressure, the density of water is maximum at a temperature of: [amp_mcq option1=”0 \u00b0C” option2=”4 \u00b0C” option3=”-4 \u00b0C” option4=”1 \u00b0C” correct=”option2″] This question was previously asked in UPSC Geoscientist – 2020 Download PDFAttempt Online At atmospheric pressure, the density of water is maximum at a temperature of 4 \u00b0C. This is due to … <\/p>\n

Detailed SolutionAt atmospheric pressure, the density of water is maximum at a temperat<\/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":[1091],"tags":[1288,1130,1128],"class_list":["post-86732","post","type-post","status-publish","format-standard","hentry","category-upsc-geoscientist","tag-1288","tag-heat-and-thermodynamics","tag-physics","no-featured-image-padding"],"yoast_head":"\nAt atmospheric pressure, the density of water is maximum at a temperat<\/title>\n<meta name=\"description\" content=\"At atmospheric pressure, the density of water is maximum at a temperature of 4 \u00b0C. This is due to the anomalous expansion of water. As water is heated from 0 \u00b0C to 4 \u00b0C, it contracts (density increases), unlike most substances which expand upon heating. Above 4 \u00b0C, water expands normally upon heating (density decreases). Conversely, when water is cooled from higher temperatures, its density increases until it reaches a maximum at 4 \u00b0C, and then decreases as it is cooled from 4 \u00b0C to 0 \u00b0C (it expands upon freezing at 0 \u00b0C). Water exhibits anomalous expansion, reaching its maximum density at 4 \u00b0C.\" \/>\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\/at-atmospheric-pressure-the-density-of-water-is-maximum-at-a-temperat\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"At atmospheric pressure, the density of water is maximum at a temperat\" \/>\n<meta property=\"og:description\" content=\"At atmospheric pressure, the density of water is maximum at a temperature of 4 \u00b0C. This is due to the anomalous expansion of water. As water is heated from 0 \u00b0C to 4 \u00b0C, it contracts (density increases), unlike most substances which expand upon heating. Above 4 \u00b0C, water expands normally upon heating (density decreases). Conversely, when water is cooled from higher temperatures, its density increases until it reaches a maximum at 4 \u00b0C, and then decreases as it is cooled from 4 \u00b0C to 0 \u00b0C (it expands upon freezing at 0 \u00b0C). Water exhibits anomalous expansion, reaching its maximum density at 4 \u00b0C.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/at-atmospheric-pressure-the-density-of-water-is-maximum-at-a-temperat\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T04:19:39+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":"At atmospheric pressure, the density of water is maximum at a temperat","description":"At atmospheric pressure, the density of water is maximum at a temperature of 4 \u00b0C. This is due to the anomalous expansion of water. As water is heated from 0 \u00b0C to 4 \u00b0C, it contracts (density increases), unlike most substances which expand upon heating. Above 4 \u00b0C, water expands normally upon heating (density decreases). Conversely, when water is cooled from higher temperatures, its density increases until it reaches a maximum at 4 \u00b0C, and then decreases as it is cooled from 4 \u00b0C to 0 \u00b0C (it expands upon freezing at 0 \u00b0C). Water exhibits anomalous expansion, reaching its maximum density at 4 \u00b0C.","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\/at-atmospheric-pressure-the-density-of-water-is-maximum-at-a-temperat\/","og_locale":"en_US","og_type":"article","og_title":"At atmospheric pressure, the density of water is maximum at a temperat","og_description":"At atmospheric pressure, the density of water is maximum at a temperature of 4 \u00b0C. This is due to the anomalous expansion of water. As water is heated from 0 \u00b0C to 4 \u00b0C, it contracts (density increases), unlike most substances which expand upon heating. Above 4 \u00b0C, water expands normally upon heating (density decreases). Conversely, when water is cooled from higher temperatures, its density increases until it reaches a maximum at 4 \u00b0C, and then decreases as it is cooled from 4 \u00b0C to 0 \u00b0C (it expands upon freezing at 0 \u00b0C). Water exhibits anomalous expansion, reaching its maximum density at 4 \u00b0C.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/at-atmospheric-pressure-the-density-of-water-is-maximum-at-a-temperat\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T04:19:39+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/at-atmospheric-pressure-the-density-of-water-is-maximum-at-a-temperat\/","url":"https:\/\/exam.pscnotes.com\/mcq\/at-atmospheric-pressure-the-density-of-water-is-maximum-at-a-temperat\/","name":"At atmospheric pressure, the density of water is maximum at a temperat","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T04:19:39+00:00","dateModified":"2025-06-01T04:19:39+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"At atmospheric pressure, the density of water is maximum at a temperature of 4 \u00b0C. This is due to the anomalous expansion of water. As water is heated from 0 \u00b0C to 4 \u00b0C, it contracts (density increases), unlike most substances which expand upon heating. Above 4 \u00b0C, water expands normally upon heating (density decreases). Conversely, when water is cooled from higher temperatures, its density increases until it reaches a maximum at 4 \u00b0C, and then decreases as it is cooled from 4 \u00b0C to 0 \u00b0C (it expands upon freezing at 0 \u00b0C). Water exhibits anomalous expansion, reaching its maximum density at 4 \u00b0C.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/at-atmospheric-pressure-the-density-of-water-is-maximum-at-a-temperat\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/at-atmospheric-pressure-the-density-of-water-is-maximum-at-a-temperat\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/at-atmospheric-pressure-the-density-of-water-is-maximum-at-a-temperat\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC Geoscientist","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-geoscientist\/"},{"@type":"ListItem","position":3,"name":"At atmospheric pressure, the density of water is maximum at a temperat"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/86732","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=86732"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/86732\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=86732"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=86732"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=86732"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}