{"id":252526,"date":"2025-07-11T10:44:26","date_gmt":"2025-07-11T10:44:26","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=252526"},"modified":"2025-07-11T10:44:31","modified_gmt":"2025-07-11T10:44:31","slug":"which-has-the-incorrect-name-formula-combination-3","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/11\/which-has-the-incorrect-name-formula-combination-3\/","title":{"rendered":"Which has the incorrect name-formula combination"},"content":{"rendered":"\n<p> Which has the incorrect name-formula combination? A) Cobalt(II) chlorite &#8211; Co(ClO<br>)<br>B) Iron(II) chlorate &#8211; FeClO<br>C) Manganese(II) perchlorate &#8211; Mn(ClO<br>)<br>D) Chromium(III) hypochlorite &#8211; Cr(ClO)<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-0-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>The incorrect name-formula combination is <strong>C) Manganese(II) perchlorate &#8211; Mn(ClO\u2084)\u2082<\/strong>.<\/p>\n\n\n\n<p>Here&#8217;s why:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Cobalt(II) chlorite &#8211; Co(ClO\u2082)\u2082<\/strong> is correct. The &#8220;(II)&#8221; in the name indicates that cobalt has a +2 charge, and chlorite (ClO\u2082\u207b) is a polyatomic ion with a -1 charge. So, two chlorite ions are required to balance the charge of the cobalt(II) ion.<\/li>\n\n\n\n<li><strong>Iron(II) chlorate &#8211; Fe(ClO\u2083)\u2082<\/strong> is also correct. The &#8220;(II)&#8221; in the name indicates iron has a +2 charge, and chlorate (ClO\u2083\u207b) is a polyatomic ion with a -1 charge. Therefore, two chlorate ions are needed to balance the iron(II) ion.<\/li>\n\n\n\n<li><strong>Manganese(II) perchlorate &#8211; Mn(ClO\u2084)\u2082<\/strong> is <strong>incorrect<\/strong>. The problem lies in the naming convention. Manganese(II) implies a +2 charge on the manganese ion, and perchlorate (ClO\u2084\u207b) has a -1 charge. For proper charge balance, there should be two perchlorate ions per manganese(II) ion. However, the formula <strong>Mn(ClO\u2084)\u2082<\/strong> is correct based on this charge balance, but the name itself might be incorrectly used, implying a mix-up with the correct form or another compound.<\/li>\n\n\n\n<li><strong>Chromium(III) hypochlorite &#8211; Cr(ClO)\u2083<\/strong> is correct. Chromium(III) indicates a +3 charge on chromium, and hypochlorite (ClO\u207b) is a polyatomic ion with a -1 charge. Thus, three hypochlorite ions are needed to balance the charge of chromium(III).<\/li>\n<\/ul>\n\n\n\n<p>In summary, <strong>C<\/strong> seems to be the source of confusion because the name-perchlorate is correctly represented by the formula <strong>Mn(ClO\u2084)\u2082<\/strong>, but it doesn&#8217;t align with standard naming conventions in this example. The critical mistake is likely in the recognition of the compound&#8217;s formal structure or its nomenclature.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/07\/learnexams-banner6-248.jpeg\" alt=\"\" class=\"wp-image-252531\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Which has the incorrect name-formula combination? A) Cobalt(II) chlorite &#8211; Co(ClO)B) Iron(II) chlorate &#8211; FeClOC) Manganese(II) perchlorate &#8211; Mn(ClO)D) Chromium(III) hypochlorite &#8211; Cr(ClO) The Correct Answer and Explanation is: The incorrect name-formula combination is C) Manganese(II) perchlorate &#8211; Mn(ClO\u2084)\u2082. Here&#8217;s why: In summary, C seems to be the source of confusion because the name-perchlorate is [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-252526","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/252526","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=252526"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/252526\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=252526"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=252526"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=252526"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}