{"id":89082,"date":"2025-06-01T07:29:02","date_gmt":"2025-06-01T07:29:02","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89082"},"modified":"2025-06-01T07:29:02","modified_gmt":"2025-06-01T07:29:02","slug":"at-which-temperature-does-liquid-water-show-maximum-density","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/at-which-temperature-does-liquid-water-show-maximum-density\/","title":{"rendered":"At which temperature does liquid water show maximum density ?"},"content":{"rendered":"

At which temperature does liquid water show maximum density ?<\/p>\n

[amp_mcq option1=”299 K” option2=”277 K” option3=”285 K” option4=”373 K” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2024<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nLiquid water exhibits its maximum density at 4\u00b0C. Converting this to Kelvin, we get 4 + 273.15 = 277.15 K. The option closest to this value is 277 K.
\n<\/section>\n
\n– Unlike most substances which become denser as they are cooled, water behaves unusually in the temperature range of 0\u00b0C to 4\u00b0C.
\n– As liquid water cools from higher temperatures, its density increases until it reaches a maximum density at approximately 4\u00b0C (3.98\u00b0C to be precise).
\n– Below 4\u00b0C, the density of liquid water starts to decrease as it approaches its freezing point (0\u00b0C). When it freezes to form ice at 0\u00b0C, its density decreases significantly, which is why ice floats on water.
\n– This anomalous expansion of water is crucial for aquatic life in cold climates, as the densest water (at 4\u00b0C) sinks to the bottom of lakes, allowing life to survive below the surface ice.
\n<\/section>\n
\nThe Kelvin scale is an absolute thermodynamic temperature scale where 0 K is absolute zero. The relationship between Celsius (\u00b0C) and Kelvin (K) is K = \u00b0C + 273.15. The boiling point of water at standard atmospheric pressure is 100\u00b0C or 373.15 K.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

At which temperature does liquid water show maximum density ? [amp_mcq option1=”299 K” option2=”277 K” option3=”285 K” option4=”373 K” correct=”option2″] This question was previously asked in UPSC NDA-2 – 2024 Download PDFAttempt Online Liquid water exhibits its maximum density at 4\u00b0C. Converting this to Kelvin, we get 4 + 273.15 = 277.15 K. The option … <\/p>\n

Detailed SolutionAt which temperature does liquid water show maximum density ?<\/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":[1094],"tags":[1103,1160,1128],"class_list":["post-89082","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1103","tag-physical-properties-of-materials","tag-physics","no-featured-image-padding"],"yoast_head":"\nAt which temperature does liquid water show maximum density ?<\/title>\n<meta name=\"description\" content=\"Liquid water exhibits its maximum density at 4\u00b0C. Converting this to Kelvin, we get 4 + 273.15 = 277.15 K. The option closest to this value is 277 K. - Unlike most substances which become denser as they are cooled, water behaves unusually in the temperature range of 0\u00b0C to 4\u00b0C. - As liquid water cools from higher temperatures, its density increases until it reaches a maximum density at approximately 4\u00b0C (3.98\u00b0C to be precise). - Below 4\u00b0C, the density of liquid water starts to decrease as it approaches its freezing point (0\u00b0C). When it freezes to form ice at 0\u00b0C, its density decreases significantly, which is why ice floats on water. - This anomalous expansion of water is crucial for aquatic life in cold climates, as the densest water (at 4\u00b0C) sinks to the bottom of lakes, allowing life to survive below the surface ice.\" \/>\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-which-temperature-does-liquid-water-show-maximum-density\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"At which temperature does liquid water show maximum density ?\" \/>\n<meta property=\"og:description\" content=\"Liquid water exhibits its maximum density at 4\u00b0C. Converting this to Kelvin, we get 4 + 273.15 = 277.15 K. The option closest to this value is 277 K. - Unlike most substances which become denser as they are cooled, water behaves unusually in the temperature range of 0\u00b0C to 4\u00b0C. - As liquid water cools from higher temperatures, its density increases until it reaches a maximum density at approximately 4\u00b0C (3.98\u00b0C to be precise). - Below 4\u00b0C, the density of liquid water starts to decrease as it approaches its freezing point (0\u00b0C). When it freezes to form ice at 0\u00b0C, its density decreases significantly, which is why ice floats on water. - This anomalous expansion of water is crucial for aquatic life in cold climates, as the densest water (at 4\u00b0C) sinks to the bottom of lakes, allowing life to survive below the surface ice.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/at-which-temperature-does-liquid-water-show-maximum-density\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:29:02+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 which temperature does liquid water show maximum density ?","description":"Liquid water exhibits its maximum density at 4\u00b0C. Converting this to Kelvin, we get 4 + 273.15 = 277.15 K. The option closest to this value is 277 K. - Unlike most substances which become denser as they are cooled, water behaves unusually in the temperature range of 0\u00b0C to 4\u00b0C. - As liquid water cools from higher temperatures, its density increases until it reaches a maximum density at approximately 4\u00b0C (3.98\u00b0C to be precise). - Below 4\u00b0C, the density of liquid water starts to decrease as it approaches its freezing point (0\u00b0C). When it freezes to form ice at 0\u00b0C, its density decreases significantly, which is why ice floats on water. - This anomalous expansion of water is crucial for aquatic life in cold climates, as the densest water (at 4\u00b0C) sinks to the bottom of lakes, allowing life to survive below the surface ice.","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-which-temperature-does-liquid-water-show-maximum-density\/","og_locale":"en_US","og_type":"article","og_title":"At which temperature does liquid water show maximum density ?","og_description":"Liquid water exhibits its maximum density at 4\u00b0C. Converting this to Kelvin, we get 4 + 273.15 = 277.15 K. The option closest to this value is 277 K. - Unlike most substances which become denser as they are cooled, water behaves unusually in the temperature range of 0\u00b0C to 4\u00b0C. - As liquid water cools from higher temperatures, its density increases until it reaches a maximum density at approximately 4\u00b0C (3.98\u00b0C to be precise). - Below 4\u00b0C, the density of liquid water starts to decrease as it approaches its freezing point (0\u00b0C). When it freezes to form ice at 0\u00b0C, its density decreases significantly, which is why ice floats on water. - This anomalous expansion of water is crucial for aquatic life in cold climates, as the densest water (at 4\u00b0C) sinks to the bottom of lakes, allowing life to survive below the surface ice.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/at-which-temperature-does-liquid-water-show-maximum-density\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:29:02+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-which-temperature-does-liquid-water-show-maximum-density\/","url":"https:\/\/exam.pscnotes.com\/mcq\/at-which-temperature-does-liquid-water-show-maximum-density\/","name":"At which temperature does liquid water show maximum density ?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:29:02+00:00","dateModified":"2025-06-01T07:29:02+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Liquid water exhibits its maximum density at 4\u00b0C. Converting this to Kelvin, we get 4 + 273.15 = 277.15 K. The option closest to this value is 277 K. - Unlike most substances which become denser as they are cooled, water behaves unusually in the temperature range of 0\u00b0C to 4\u00b0C. - As liquid water cools from higher temperatures, its density increases until it reaches a maximum density at approximately 4\u00b0C (3.98\u00b0C to be precise). - Below 4\u00b0C, the density of liquid water starts to decrease as it approaches its freezing point (0\u00b0C). When it freezes to form ice at 0\u00b0C, its density decreases significantly, which is why ice floats on water. - This anomalous expansion of water is crucial for aquatic life in cold climates, as the densest water (at 4\u00b0C) sinks to the bottom of lakes, allowing life to survive below the surface ice.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/at-which-temperature-does-liquid-water-show-maximum-density\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/at-which-temperature-does-liquid-water-show-maximum-density\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/at-which-temperature-does-liquid-water-show-maximum-density\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC NDA-2","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-nda-2\/"},{"@type":"ListItem","position":3,"name":"At which temperature does liquid water show maximum density ?"}]},{"@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\/89082","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=89082"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/89082\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=89082"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=89082"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=89082"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}