{"id":204856,"date":"2025-03-22T17:13:14","date_gmt":"2025-03-22T17:13:14","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=204856"},"modified":"2025-03-22T17:13:16","modified_gmt":"2025-03-22T17:13:16","slug":"a-urea-molecule-contains","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/03\/22\/a-urea-molecule-contains\/","title":{"rendered":"A urea molecule contains"},"content":{"rendered":"\n<p>A urea molecule contains<\/p>\n\n\n\n<p>a.two nitrogen atoms<\/p>\n\n\n\n<p>b.two carbon atoms<\/p>\n\n\n\n<p>c.two hydrogen atoms<\/p>\n\n\n\n<p>d.more than one correct response<\/p>\n\n\n\n<p>e.no correct response<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-6-color\"><strong>The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n<p>The correct answer is:<\/p>\n\n\n\n<p><strong>(a) Two nitrogen atoms<\/strong><\/p>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation:<\/h3>\n\n\n\n<p>Urea ((\\text{CH}_4\\text{N}_2\\text{O})) is a simple organic molecule that plays a crucial role in nitrogen metabolism in living organisms. It is the primary nitrogenous waste product in humans and many animals, excreted through urine.<\/p>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>1. Molecular Composition of Urea<\/strong><\/h4>\n\n\n\n<p>Urea consists of:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Two nitrogen (N) atoms<\/strong><\/li>\n\n\n\n<li><strong>One carbon (C) atom<\/strong><\/li>\n\n\n\n<li><strong>Four hydrogen (H) atoms<\/strong><\/li>\n\n\n\n<li><strong>One oxygen (O) atom<\/strong><\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>2. Structural Representation<\/strong><\/h4>\n\n\n\n<p>The molecular formula of urea is <strong>CH\u2084N\u2082O<\/strong>, and its structural formula is:<\/p>\n\n\n\n<p>[<br>\\text{H}_2\\text{N}-\\text{C}(\\text{=O})-\\text{NH}_2<br>]<\/p>\n\n\n\n<p>In this structure:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The <strong>carbon atom<\/strong> is centrally located and forms a double bond with <strong>oxygen<\/strong> (C=O).<\/li>\n\n\n\n<li>Two <strong>amine (-NH\u2082) groups<\/strong> are attached to the carbon atom, each containing a nitrogen atom.<\/li>\n<\/ul>\n\n\n\n<h4 class=\"wp-block-heading\"><strong>3. Evaluating the Answer Choices<\/strong><\/h4>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>(a) Two nitrogen atoms \u2192 Correct<\/strong><\/li>\n\n\n\n<li>Urea contains two nitrogen atoms from its two amine (-NH\u2082) groups.<\/li>\n\n\n\n<li><strong>(b) Two carbon atoms \u2192 Incorrect<\/strong><\/li>\n\n\n\n<li>Urea contains only <strong>one<\/strong> carbon atom, not two.<\/li>\n\n\n\n<li><strong>(c) Two hydrogen atoms \u2192 Incorrect<\/strong><\/li>\n\n\n\n<li>Urea has <strong>four<\/strong> hydrogen atoms (two from each -NH\u2082 group), not just two.<\/li>\n\n\n\n<li><strong>(d) More than one correct response \u2192 Incorrect<\/strong><\/li>\n\n\n\n<li>Only option <strong>(a) is correct<\/strong>, so this option does not apply.<\/li>\n\n\n\n<li><strong>(e) No correct response \u2192 Incorrect<\/strong><\/li>\n\n\n\n<li>Since (a) is correct, this option is not valid.<\/li>\n<\/ul>\n\n\n\n<p>Thus, <strong>option (a) is the correct answer<\/strong> because a urea molecule contains two nitrogen atoms.<\/p>\n","protected":false},"excerpt":{"rendered":"<p>A urea molecule contains a.two nitrogen atoms b.two carbon atoms c.two hydrogen atoms d.more than one correct response e.no correct response The correct answer and explanation is : The correct answer is: (a) Two nitrogen atoms Explanation: Urea ((\\text{CH}_4\\text{N}_2\\text{O})) is a simple organic molecule that plays a crucial role in nitrogen metabolism in living organisms. [&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-204856","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/204856","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=204856"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/204856\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=204856"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=204856"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=204856"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}