{"id":86363,"date":"2025-06-01T03:45:19","date_gmt":"2025-06-01T03:45:19","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=86363"},"modified":"2025-06-01T03:45:19","modified_gmt":"2025-06-01T03:45:19","slug":"when-water-is-heated-from-0c-to-4c-its-density","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/when-water-is-heated-from-0c-to-4c-its-density\/","title":{"rendered":"When water is heated from 0\u00b0C to 4\u00b0C, its density"},"content":{"rendered":"

When water is heated from 0\u00b0C to 4\u00b0C, its density<\/p>\n

[amp_mcq option1=”remains constant.” option2=”increases.” option3=”decreases.” option4=”first increases then decreases to its original value.” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-2 – 2022<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is B) increases.
\n<\/section>\n
\nWater exhibits anomalous expansion between 0\u00b0C and 4\u00b0C. Unlike most substances whose density decreases upon heating (as volume increases), water’s volume *decreases* when heated from 0\u00b0C to 4\u00b0C. Density is mass per unit volume (\u03c1 = m\/V). Since the mass remains constant and the volume decreases in this temperature range, the density of water increases.
\n<\/section>\n
\nThe density of water is maximum at 4\u00b0C (approximately 1000 kg\/m\u00b3). Above 4\u00b0C, water behaves normally; its volume increases with temperature, and thus its density decreases. This peculiar property of water is crucial for aquatic life in cold climates, as lakes and rivers freeze from the top down, allowing aquatic organisms to survive in the denser, warmer water at the bottom.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

When water is heated from 0\u00b0C to 4\u00b0C, its density [amp_mcq option1=”remains constant.” option2=”increases.” option3=”decreases.” option4=”first increases then decreases to its original value.” correct=”option2″] This question was previously asked in UPSC CDS-2 – 2022 Download PDFAttempt Online The correct answer is B) increases. Water exhibits anomalous expansion between 0\u00b0C and 4\u00b0C. Unlike most substances whose … <\/p>\n

Detailed SolutionWhen water is heated from 0\u00b0C to 4\u00b0C, its 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":[1088],"tags":[1108,1160,1128],"class_list":["post-86363","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-2","tag-1108","tag-physical-properties-of-materials","tag-physics","no-featured-image-padding"],"yoast_head":"\nWhen water is heated from 0\u00b0C to 4\u00b0C, its density<\/title>\n<meta name=\"description\" content=\"The correct answer is B) increases. Water exhibits anomalous expansion between 0\u00b0C and 4\u00b0C. Unlike most substances whose density decreases upon heating (as volume increases), water's volume *decreases* when heated from 0\u00b0C to 4\u00b0C. Density is mass per unit volume (\u03c1 = m\/V). Since the mass remains constant and the volume decreases in this temperature range, the density of water increases.\" \/>\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-water-is-heated-from-0c-to-4c-its-density\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"When water is heated from 0\u00b0C to 4\u00b0C, its density\" \/>\n<meta property=\"og:description\" content=\"The correct answer is B) increases. Water exhibits anomalous expansion between 0\u00b0C and 4\u00b0C. Unlike most substances whose density decreases upon heating (as volume increases), water's volume *decreases* when heated from 0\u00b0C to 4\u00b0C. Density is mass per unit volume (\u03c1 = m\/V). Since the mass remains constant and the volume decreases in this temperature range, the density of water increases.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/when-water-is-heated-from-0c-to-4c-its-density\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T03:45:19+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 water is heated from 0\u00b0C to 4\u00b0C, its density","description":"The correct answer is B) increases. 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