{"id":89958,"date":"2025-06-01T10:17:57","date_gmt":"2025-06-01T10:17:57","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89958"},"modified":"2025-06-01T10:17:57","modified_gmt":"2025-06-01T10:17:57","slug":"heavy-water-of-an-atomic-reactor-is","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/heavy-water-of-an-atomic-reactor-is\/","title":{"rendered":"Heavy water of an atomic reactor is :"},"content":{"rendered":"

Heavy water of an atomic reactor is :<\/p>\n

[amp_mcq option1=”deionised water” option2=”an oxide of heavier isotope of oxygen” option3=”a mixture of ice and water” option4=”an oxide of heavier isotope of hydrogen” correct=”option4″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2015<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nHeavy water is an oxide of a heavier isotope of hydrogen.
\n<\/section>\n
\nHeavy water has the chemical formula D\u2082O, where D represents Deuterium. Deuterium is an isotope of hydrogen that contains one proton and one neutron in its nucleus (whereas common hydrogen, Protium, has only one proton). Thus, deuterium is a heavier isotope of hydrogen. Heavy water (D\u2082O) is water composed of two deuterium atoms and one oxygen atom.
\n<\/section>\n
\nHeavy water is used in some types of nuclear reactors (like CANDU reactors) as a neutron moderator and coolant. Its function as a moderator is to slow down neutrons, making them more likely to cause nuclear fission in Uranium fuel. D\u2082O is more effective as a moderator than ordinary water (H\u2082O) because deuterium absorbs fewer neutrons than protium. Ordinary water also contains a very small natural abundance of D\u2082O (about 1 part in 6400). Isotopes of oxygen exist (e.g., \u00b9\u2076O, \u00b9\u2077O, \u00b9\u2078O), and water made with \u00b9\u2078O (H\u2082\u00b9\u2078O) is sometimes called “heavy-oxygen water”, but “heavy water” typically refers to D\u2082O.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Heavy water of an atomic reactor is : [amp_mcq option1=”deionised water” option2=”an oxide of heavier isotope of oxygen” option3=”a mixture of ice and water” option4=”an oxide of heavier isotope of hydrogen” correct=”option4″] This question was previously asked in UPSC CAPF – 2015 Download PDFAttempt Online Heavy water is an oxide of a heavier isotope of … <\/p>\n

Detailed SolutionHeavy water of an atomic reactor is :<\/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":[1085],"tags":[1443,1096,1161],"class_list":["post-89958","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1443","tag-chemistry","tag-hydrogen-and-its-compounds","no-featured-image-padding"],"yoast_head":"\nHeavy water of an atomic reactor is :<\/title>\n<meta name=\"description\" content=\"Heavy water is an oxide of a heavier isotope of hydrogen. Heavy water has the chemical formula D\u2082O, where D represents Deuterium. Deuterium is an isotope of hydrogen that contains one proton and one neutron in its nucleus (whereas common hydrogen, Protium, has only one proton). Thus, deuterium is a heavier isotope of hydrogen. Heavy water (D\u2082O) is water composed of two deuterium atoms and one oxygen atom.\" \/>\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\/heavy-water-of-an-atomic-reactor-is\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Heavy water of an atomic reactor is :\" \/>\n<meta property=\"og:description\" content=\"Heavy water is an oxide of a heavier isotope of hydrogen. Heavy water has the chemical formula D\u2082O, where D represents Deuterium. Deuterium is an isotope of hydrogen that contains one proton and one neutron in its nucleus (whereas common hydrogen, Protium, has only one proton). Thus, deuterium is a heavier isotope of hydrogen. 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Heavy water has the chemical formula D\u2082O, where D represents Deuterium. Deuterium is an isotope of hydrogen that contains one proton and one neutron in its nucleus (whereas common hydrogen, Protium, has only one proton). Thus, deuterium is a heavier isotope of hydrogen. 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