{"id":228812,"date":"2025-06-07T16:04:45","date_gmt":"2025-06-07T16:04:45","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=228812"},"modified":"2025-06-07T16:04:47","modified_gmt":"2025-06-07T16:04:47","slug":"saved-which-of-the-following-lewis-structures-are-incorrect-1-brf3-br-2-cocl2-c-c-c-3-hcn-h-cn-4-hfco-e-c-1","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/07\/saved-which-of-the-following-lewis-structures-are-incorrect-1-brf3-br-2-cocl2-c-c-c-3-hcn-h-cn-4-hfco-e-c-1\/","title":{"rendered":"Saved Which of the following Lewis structures are INCORRECT? 1) BrF3 Br 2) COCl2 C-C-C: 3) HCN H-C=N: 4) HFCO E-C-# 1"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\">Saved Which of the following Lewis structures are INCORRECT? 1) BrF3 Br 2) COCl2 C-C-C: 3) HCN H-C=N: 4) HFCO E-C-# 1<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/image-249.png\" alt=\"\" class=\"wp-image-228813\"\/><\/figure>\n\n\n\n<p class=\"wp-block-paragraph\"><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p class=\"wp-block-paragraph\">The question asks which <strong>Lewis structures are incorrect<\/strong>, and the correct answer is:<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">\u2705 <strong>2) COCl\u2082<\/strong> and <strong>4) HFCO<\/strong> \u2014 <strong>both are incorrect.<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation<\/h3>\n\n\n\n<h4 class=\"wp-block-heading\">1) <strong>BrF\u2083 (Bromine trifluoride)<\/strong> \u2013 <strong>Correct<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The Lewis structure for BrF\u2083 is accurate. Bromine (Br) is the central atom with 3 bonded fluorine atoms and 2 lone pairs. This leads to 5 electron regions, which gives it a <strong>T-shaped molecular geometry<\/strong>, matching the Lewis structure shown.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">2) <strong>COCl\u2082 (Phosgene)<\/strong> \u2013 <strong>Incorrect<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The shown structure has <strong>two carbon atoms<\/strong>, which is <strong>incorrect<\/strong>. COCl\u2082 should have <strong>one central carbon atom<\/strong> double-bonded to one oxygen atom and single-bonded to two chlorine atoms. The correct Lewis structure is:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">mathematicaCopyEdit<code>     O\n     ||\nCl\u2014C\u2014Cl\n<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Carbon has 4 bonds (full octet).<\/li>\n\n\n\n<li>Oxygen has a double bond and two lone pairs.<\/li>\n\n\n\n<li>Chlorines have three lone pairs each.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The structure in the image incorrectly shows <strong>C\u2013C\u2013C<\/strong> bonding, which does not represent phosgene. Therefore, it&#8217;s incorrect.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">3) <strong>HCN (Hydrogen cyanide)<\/strong> \u2013 <strong>Correct<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The given Lewis structure for HCN is:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">mathematicaCopyEdit<code>H\u2014C\u2261N:\n<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Hydrogen forms 1 bond.<\/li>\n\n\n\n<li>Carbon forms 4 bonds (1 with H, 3 with N).<\/li>\n\n\n\n<li>Nitrogen has a triple bond and one lone pair.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">This is correct.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h4 class=\"wp-block-heading\">4) <strong>HFCO (Formyl fluoride)<\/strong> \u2013 <strong>Incorrect<\/strong><\/h4>\n\n\n\n<p class=\"wp-block-paragraph\">The image incorrectly shows <strong>a single bond between C and O<\/strong> and possibly incorrect bonding arrangements. The correct structure is:<\/p>\n\n\n\n<pre class=\"wp-block-preformatted\">scssCopyEdit<code>H\u2014C(=O)\u2014F\n<\/code><\/pre>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Carbon forms 4 bonds: 1 to H, 1 to F, and 2 to O (double bond).<\/li>\n\n\n\n<li>Oxygen has 2 lone pairs.<\/li>\n\n\n\n<li>Fluorine has 3 lone pairs.<\/li>\n<\/ul>\n\n\n\n<p class=\"wp-block-paragraph\">The image structure appears to violate the octet rule and bonding conventions, so it&#8217;s <strong>incorrect<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Final Answer:<\/h3>\n\n\n\n<p class=\"wp-block-paragraph\">\u2705 <strong>2 and 4 are incorrect Lewis structures.<\/strong><\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner4-628.jpeg\" alt=\"\" class=\"wp-image-228814\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Saved Which of the following Lewis structures are INCORRECT? 1) BrF3 Br 2) COCl2 C-C-C: 3) HCN H-C=N: 4) HFCO E-C-# 1 The Correct Answer and Explanation is: The question asks which Lewis structures are incorrect, and the correct answer is: \u2705 2) COCl\u2082 and 4) HFCO \u2014 both are incorrect. Explanation 1) BrF\u2083 (Bromine [&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-228812","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/228812","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=228812"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/228812\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=228812"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=228812"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=228812"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}