{"id":88846,"date":"2025-06-01T07:23:23","date_gmt":"2025-06-01T07:23:23","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88846"},"modified":"2025-06-01T07:23:23","modified_gmt":"2025-06-01T07:23:23","slug":"which-one-of-the-following-metals-floats-in-cold-water","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-metals-floats-in-cold-water\/","title":{"rendered":"Which one of the following metals floats in cold water?"},"content":{"rendered":"

Which one of the following metals floats in cold water?<\/p>\n

[amp_mcq option1=”Magnesium” option2=”Calcium” option3=”Potassium” option4=”Copper” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2022<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nPotassium is a metal that floats in cold water.
\n<\/section>\n
\nMetals less dense than water (density < 1 g\/cm\u00b3) and which react with water tend to float. Potassium (density ~0.89 g\/cm\u00b3) and Sodium (density ~0.97 g\/cm\u00b3) are alkali metals that are less dense than water and react vigorously with cold water, producing hydrogen gas which aids flotation. Calcium (density ~1.55 g\/cm\u00b3) is denser than water but reacts with cold water, and the hydrogen bubbles produced stick to its surface, causing it to float temporarily. Magnesium and Copper do not react with cold water in a way that causes them to float.\n<\/section>\n
\nHighly reactive metals like Potassium and Sodium react exothermically with cold water to form hydroxides and hydrogen gas. This reaction can be quite vigorous. While Calcium also reacts with cold water and floats, Potassium and Sodium are well-known examples of metals that float and move rapidly on the surface during the reaction. Among the options provided, Potassium is the most definitive answer for a metal that floats in cold water due to its low density and vigorous reaction.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following metals floats in cold water? [amp_mcq option1=”Magnesium” option2=”Calcium” option3=”Potassium” option4=”Copper” correct=”option3″] This question was previously asked in UPSC NDA-2 – 2022 Download PDFAttempt Online Potassium is a metal that floats in cold water. Metals less dense than water (density < 1 g\/cm\u00b3) and which react with water tend to float. ... \n\n

Detailed SolutionWhich one of the following metals floats in cold water?<\/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":[1108,1096,1109],"class_list":["post-88846","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1108","tag-chemistry","tag-metals-minerals-ores-properties-uses","no-featured-image-padding"],"yoast_head":"\nWhich one of the following metals floats in cold water?<\/title>\n<meta name=\"description\" content=\"Potassium is a metal that floats in cold water. Metals less dense than water (density < 1 g\/cm\u00b3) and which react with water tend to float. Potassium (density ~0.89 g\/cm\u00b3) and Sodium (density ~0.97 g\/cm\u00b3) are alkali metals that are less dense than water and react vigorously with cold water, producing hydrogen gas which aids flotation. Calcium (density ~1.55 g\/cm\u00b3) is denser than water but reacts with cold water, and the hydrogen bubbles produced stick to its surface, causing it to float temporarily. Magnesium and Copper do not react with cold water in a way that causes them to float.\" \/>\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\/which-one-of-the-following-metals-floats-in-cold-water\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following metals floats in cold water?\" \/>\n<meta property=\"og:description\" content=\"Potassium is a metal that floats in cold water. Metals less dense than water (density < 1 g\/cm\u00b3) and which react with water tend to float. Potassium (density ~0.89 g\/cm\u00b3) and Sodium (density ~0.97 g\/cm\u00b3) are alkali metals that are less dense than water and react vigorously with cold water, producing hydrogen gas which aids flotation. Calcium (density ~1.55 g\/cm\u00b3) is denser than water but reacts with cold water, and the hydrogen bubbles produced stick to its surface, causing it to float temporarily. Magnesium and Copper do not react with cold water in a way that causes them to float.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-metals-floats-in-cold-water\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:23:23+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":"Which one of the following metals floats in cold water?","description":"Potassium is a metal that floats in cold water. Metals less dense than water (density < 1 g\/cm\u00b3) and which react with water tend to float. Potassium (density ~0.89 g\/cm\u00b3) and Sodium (density ~0.97 g\/cm\u00b3) are alkali metals that are less dense than water and react vigorously with cold water, producing hydrogen gas which aids flotation. Calcium (density ~1.55 g\/cm\u00b3) is denser than water but reacts with cold water, and the hydrogen bubbles produced stick to its surface, causing it to float temporarily. 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Calcium (density ~1.55 g\/cm\u00b3) is denser than water but reacts with cold water, and the hydrogen bubbles produced stick to its surface, causing it to float temporarily. Magnesium and Copper do not react with cold water in a way that causes them to float.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-metals-floats-in-cold-water\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:23:23+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\/which-one-of-the-following-metals-floats-in-cold-water\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-metals-floats-in-cold-water\/","name":"Which one of the following metals floats in cold water?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:23:23+00:00","dateModified":"2025-06-01T07:23:23+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Potassium is a metal that floats in cold water. Metals less dense than water (density < 1 g\/cm\u00b3) and which react with water tend to float. Potassium (density ~0.89 g\/cm\u00b3) and Sodium (density ~0.97 g\/cm\u00b3) are alkali metals that are less dense than water and react vigorously with cold water, producing hydrogen gas which aids flotation. Calcium (density ~1.55 g\/cm\u00b3) is denser than water but reacts with cold water, and the hydrogen bubbles produced stick to its surface, causing it to float temporarily. 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