{"id":87565,"date":"2025-06-01T06:47:49","date_gmt":"2025-06-01T06:47:49","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87565"},"modified":"2025-06-01T06:47:49","modified_gmt":"2025-06-01T06:47:49","slug":"which-one-of-the-following-is-the-number-of-water-molecules-that-share","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-number-of-water-molecules-that-share\/","title":{"rendered":"Which one of the following is the number of water molecules that share"},"content":{"rendered":"

Which one of the following is the number of water molecules that share with two formula unit CaSO\u2084 in plaster of Paris ?<\/p>\n

[amp_mcq option1=”One” option2=”Two” option3=”Five” option4=”Ten” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2018<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nIn plaster of Paris (CaSO\u2084 \u00b7 \u00bd H\u2082O), one formula unit of CaSO\u2084 is associated with half a molecule of water. Therefore, two formula units of CaSO\u2084 share one molecule of water (2 * \u00bd H\u2082O = 1 H\u2082O).
\n<\/section>\n
\nPlaster of Paris is calcium sulfate hemihydrate (CaSO\u2084 \u00b7 \u00bd H\u2082O). This chemical formula indicates the ratio of calcium sulfate to water molecules in the crystal structure.
\n<\/section>\n
\nWhen plaster of Paris is mixed with water, it rehydrates to form gypsum (CaSO\u2084 \u00b7 2H\u2082O), a hard solid. This process is exothermic and is the basis for its use in casting and construction.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following is the number of water molecules that share with two formula unit CaSO\u2084 in plaster of Paris ? [amp_mcq option1=”One” option2=”Two” option3=”Five” option4=”Ten” correct=”option1″] This question was previously asked in UPSC NDA-1 – 2018 Download PDFAttempt Online In plaster of Paris (CaSO\u2084 \u00b7 \u00bd H\u2082O), one formula unit of CaSO\u2084 … <\/p>\n

Detailed SolutionWhich one of the following is the number of water molecules that share<\/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":[1093],"tags":[1114,1202,1096],"class_list":["post-87565","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1114","tag-acid-base-and-salt","tag-chemistry","no-featured-image-padding"],"yoast_head":"\nWhich one of the following is the number of water molecules that share<\/title>\n<meta name=\"description\" content=\"In plaster of Paris (CaSO\u2084 \u00b7 \u00bd H\u2082O), one formula unit of CaSO\u2084 is associated with half a molecule of water. Therefore, two formula units of CaSO\u2084 share one molecule of water (2 * \u00bd H\u2082O = 1 H\u2082O). Plaster of Paris is calcium sulfate hemihydrate (CaSO\u2084 \u00b7 \u00bd H\u2082O). This chemical formula indicates the ratio of calcium sulfate to water molecules in the crystal structure.\" \/>\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-is-the-number-of-water-molecules-that-share\/\" \/>\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 is the number of water molecules that share\" \/>\n<meta property=\"og:description\" content=\"In plaster of Paris (CaSO\u2084 \u00b7 \u00bd H\u2082O), one formula unit of CaSO\u2084 is associated with half a molecule of water. Therefore, two formula units of CaSO\u2084 share one molecule of water (2 * \u00bd H\u2082O = 1 H\u2082O). Plaster of Paris is calcium sulfate hemihydrate (CaSO\u2084 \u00b7 \u00bd H\u2082O). This chemical formula indicates the ratio of calcium sulfate to water molecules in the crystal structure.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-number-of-water-molecules-that-share\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:47:49+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 is the number of water molecules that share","description":"In plaster of Paris (CaSO\u2084 \u00b7 \u00bd H\u2082O), one formula unit of CaSO\u2084 is associated with half a molecule of water. Therefore, two formula units of CaSO\u2084 share one molecule of water (2 * \u00bd H\u2082O = 1 H\u2082O). Plaster of Paris is calcium sulfate hemihydrate (CaSO\u2084 \u00b7 \u00bd H\u2082O). This chemical formula indicates the ratio of calcium sulfate to water molecules in the crystal structure.","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\/which-one-of-the-following-is-the-number-of-water-molecules-that-share\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following is the number of water molecules that share","og_description":"In plaster of Paris (CaSO\u2084 \u00b7 \u00bd H\u2082O), one formula unit of CaSO\u2084 is associated with half a molecule of water. Therefore, two formula units of CaSO\u2084 share one molecule of water (2 * \u00bd H\u2082O = 1 H\u2082O). Plaster of Paris is calcium sulfate hemihydrate (CaSO\u2084 \u00b7 \u00bd H\u2082O). This chemical formula indicates the ratio of calcium sulfate to water molecules in the crystal structure.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-number-of-water-molecules-that-share\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:47:49+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-is-the-number-of-water-molecules-that-share\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-number-of-water-molecules-that-share\/","name":"Which one of the following is the number of water molecules that share","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:47:49+00:00","dateModified":"2025-06-01T06:47:49+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"In plaster of Paris (CaSO\u2084 \u00b7 \u00bd H\u2082O), one formula unit of CaSO\u2084 is associated with half a molecule of water. 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