{"id":89925,"date":"2025-06-01T10:17:21","date_gmt":"2025-06-01T10:17:21","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89925"},"modified":"2025-06-01T10:17:21","modified_gmt":"2025-06-01T10:17:21","slug":"which-one-of-the-following-statements-is-correct-32","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-32\/","title":{"rendered":"Which one of the following statements is correct ?"},"content":{"rendered":"<p>Which one of the following statements is correct ?<\/p>\n<p>[amp_mcq option1=&#8221;Iron sulphate and copper sulphate crystals have same number of water of crystallization&#8221; option2=&#8221;Iron sulphate and zinc sulphate crystals have same number of water of crystallization&#8221; option3=&#8221;Zinc sulphate and copper sulphate crystals have same number of water of crystallization&#8221; option4=&#8221;Iron sulphate, copper sulphate and zinc sulphate crystals each have same number of water of crystallization&#8221; correct=&#8221;option2&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC CAPF &#8211; 2015<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-capf-2015.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-capf-2015\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nThe statement that is correct is that Iron sulphate and zinc sulphate crystals have the same number of water of crystallization.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nCrystals of hydrated salts contain a definite number of water molecules incorporated within their crystal structure. This water is called water of crystallization.<br \/>\n&#8211; Iron(II) sulphate (Ferrous sulphate) commonly crystallizes as the heptahydrate, FeSO4.7H2O.<br \/>\n&#8211; Copper(II) sulphate commonly crystallizes as the pentahydrate, CuSO4.5H2O.<br \/>\n&#8211; Zinc sulphate commonly crystallizes as the heptahydrate, ZnSO4.7H2O.<\/p>\n<p>Comparing the number of water molecules:<br \/>\n&#8211; Iron sulphate (7) and Copper sulphate (5): Different number.<br \/>\n&#8211; Iron sulphate (7) and Zinc sulphate (7): Same number.<br \/>\n&#8211; Zinc sulphate (7) and Copper sulphate (5): Different number.<br \/>\n&#8211; Iron sulphate (7), Copper sulphate (5), and Zinc sulphate (7): Not all have the same number.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nThe number of water molecules in a hydrated crystal is specific to the compound and the conditions under which it crystallized. Common hydrated salts often encountered in chemistry include copper(II) sulphate pentahydrate (blue vitriol), iron(II) sulphate heptahydrate (green vitriol), and zinc sulphate heptahydrate (white vitriol).<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Which one of the following statements is correct ? [amp_mcq option1=&#8221;Iron sulphate and copper sulphate crystals have same number of water of crystallization&#8221; option2=&#8221;Iron sulphate and zinc sulphate crystals have same number of water of crystallization&#8221; option3=&#8221;Zinc sulphate and copper sulphate crystals have same number of water of crystallization&#8221; option4=&#8221;Iron sulphate, copper sulphate and zinc &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Which one of the following statements is correct ?\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-32\/#more-89925\">Detailed Solution<span class=\"screen-reader-text\">Which one of the following statements is correct ?<\/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":[1443,1096,1239],"class_list":["post-89925","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1443","tag-chemistry","tag-inorganic-chemistry","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Which one of the following statements is correct ?<\/title>\n<meta name=\"description\" content=\"The statement that is correct is that Iron sulphate and zinc sulphate crystals have the same number of water of crystallization. Crystals of hydrated salts contain a definite number of water molecules incorporated within their crystal structure. This water is called water of crystallization. - Iron(II) sulphate (Ferrous sulphate) commonly crystallizes as the heptahydrate, FeSO4.7H2O. - Copper(II) sulphate commonly crystallizes as the pentahydrate, CuSO4.5H2O. - Zinc sulphate commonly crystallizes as the heptahydrate, ZnSO4.7H2O. Comparing the number of water molecules: - Iron sulphate (7) and Copper sulphate (5): Different number. - Iron sulphate (7) and Zinc sulphate (7): Same number. - Zinc sulphate (7) and Copper sulphate (5): Different number. - Iron sulphate (7), Copper sulphate (5), and Zinc sulphate (7): Not all have the same number.\" \/>\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-statements-is-correct-32\/\" \/>\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 statements is correct ?\" \/>\n<meta property=\"og:description\" content=\"The statement that is correct is that Iron sulphate and zinc sulphate crystals have the same number of water of crystallization. Crystals of hydrated salts contain a definite number of water molecules incorporated within their crystal structure. This water is called water of crystallization. - Iron(II) sulphate (Ferrous sulphate) commonly crystallizes as the heptahydrate, FeSO4.7H2O. - Copper(II) sulphate commonly crystallizes as the pentahydrate, CuSO4.5H2O. - Zinc sulphate commonly crystallizes as the heptahydrate, ZnSO4.7H2O. Comparing the number of water molecules: - Iron sulphate (7) and Copper sulphate (5): Different number. - Iron sulphate (7) and Zinc sulphate (7): Same number. - Zinc sulphate (7) and Copper sulphate (5): Different number. - Iron sulphate (7), Copper sulphate (5), and Zinc sulphate (7): Not all have the same number.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-32\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:17:21+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 statements is correct ?","description":"The statement that is correct is that Iron sulphate and zinc sulphate crystals have the same number of water of crystallization. Crystals of hydrated salts contain a definite number of water molecules incorporated within their crystal structure. This water is called water of crystallization. - Iron(II) sulphate (Ferrous sulphate) commonly crystallizes as the heptahydrate, FeSO4.7H2O. - Copper(II) sulphate commonly crystallizes as the pentahydrate, CuSO4.5H2O. - Zinc sulphate commonly crystallizes as the heptahydrate, ZnSO4.7H2O. Comparing the number of water molecules: - Iron sulphate (7) and Copper sulphate (5): Different number. - Iron sulphate (7) and Zinc sulphate (7): Same number. - Zinc sulphate (7) and Copper sulphate (5): Different number. - Iron sulphate (7), Copper sulphate (5), and Zinc sulphate (7): Not all have the same number.","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-statements-is-correct-32\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following statements is correct ?","og_description":"The statement that is correct is that Iron sulphate and zinc sulphate crystals have the same number of water of crystallization. Crystals of hydrated salts contain a definite number of water molecules incorporated within their crystal structure. This water is called water of crystallization. - Iron(II) sulphate (Ferrous sulphate) commonly crystallizes as the heptahydrate, FeSO4.7H2O. - Copper(II) sulphate commonly crystallizes as the pentahydrate, CuSO4.5H2O. - Zinc sulphate commonly crystallizes as the heptahydrate, ZnSO4.7H2O. Comparing the number of water molecules: - Iron sulphate (7) and Copper sulphate (5): Different number. - Iron sulphate (7) and Zinc sulphate (7): Same number. - Zinc sulphate (7) and Copper sulphate (5): Different number. - Iron sulphate (7), Copper sulphate (5), and Zinc sulphate (7): Not all have the same number.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-32\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:17:21+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-statements-is-correct-32\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-32\/","name":"Which one of the following statements is correct ?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:17:21+00:00","dateModified":"2025-06-01T10:17:21+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The statement that is correct is that Iron sulphate and zinc sulphate crystals have the same number of water of crystallization. Crystals of hydrated salts contain a definite number of water molecules incorporated within their crystal structure. This water is called water of crystallization. - Iron(II) sulphate (Ferrous sulphate) commonly crystallizes as the heptahydrate, FeSO4.7H2O. - Copper(II) sulphate commonly crystallizes as the pentahydrate, CuSO4.5H2O. - Zinc sulphate commonly crystallizes as the heptahydrate, ZnSO4.7H2O. Comparing the number of water molecules: - Iron sulphate (7) and Copper sulphate (5): Different number. - Iron sulphate (7) and Zinc sulphate (7): Same number. - Zinc sulphate (7) and Copper sulphate (5): Different number. - Iron sulphate (7), Copper sulphate (5), and Zinc sulphate (7): Not all have the same number.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-32\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-32\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-correct-32\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CAPF","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-capf\/"},{"@type":"ListItem","position":3,"name":"Which one of the following statements is correct ?"}]},{"@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\/89925","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=89925"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/89925\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=89925"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=89925"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=89925"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}