{"id":210350,"date":"2025-04-30T08:51:10","date_gmt":"2025-04-30T08:51:10","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=210350"},"modified":"2025-04-30T08:51:12","modified_gmt":"2025-04-30T08:51:12","slug":"which-has-the-smallest-dipole-dipole-forces","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/04\/30\/which-has-the-smallest-dipole-dipole-forces\/","title":{"rendered":"Which has the smallest dipole-dipole forces"},"content":{"rendered":"\n<p>Which has the smallest dipole-dipole forces?<\/p>\n\n\n\n<p>A. CH3 CI<br>B. HCI<br>C. AsH3<br>D. CO<\/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: <strong>C. AsH\u2083<\/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<p><strong>Dipole-dipole forces<\/strong> are a type of <strong>intermolecular force<\/strong> that arise between polar molecules\u2014those that have permanent dipoles due to differences in electronegativity between atoms and the molecular geometry. The strength of dipole-dipole interactions depends on two main factors:<\/p>\n\n\n\n<ol class=\"wp-block-list\">\n<li><strong>Polarity of the molecule<\/strong> (i.e., the magnitude of the dipole moment).<\/li>\n\n\n\n<li><strong>Molecular structure and shape<\/strong>, which influence how effectively molecules align to maximize attractions.<\/li>\n<\/ol>\n\n\n\n<p>Let\u2019s analyze the given options:<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">A. <strong>CH\u2083Cl (Chloromethane)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Structure: A tetrahedral molecule with a significant dipole from C to Cl due to Cl\u2019s high electronegativity.<\/li>\n\n\n\n<li>Polarity: Strongly polar due to the C\u2013Cl bond.<\/li>\n\n\n\n<li><strong>Dipole moment: ~1.9 D (Debye units)<\/strong><\/li>\n\n\n\n<li><strong>Dipole-dipole forces: Moderate to strong<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">B. <strong>HCl (Hydrogen chloride)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>A linear molecule with a highly polar H\u2013Cl bond due to the large electronegativity difference between H and Cl.<\/li>\n\n\n\n<li><strong>Dipole moment: ~1.1 D<\/strong><\/li>\n\n\n\n<li><strong>Dipole-dipole forces: Moderate<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">C. <strong>AsH\u2083 (Arsine)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Structure: Trigonal pyramidal, like NH\u2083, but the electronegativity difference between As (2.0) and H (2.1) is <strong>negligible<\/strong>.<\/li>\n\n\n\n<li><strong>Polarity: Very weak<\/strong>\u2014close to nonpolar despite geometry.<\/li>\n\n\n\n<li><strong>Dipole moment: ~0.2 D<\/strong><\/li>\n\n\n\n<li><strong>Dipole-dipole forces: Very weak<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">D. <strong>CO (Carbon monoxide)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Structure: Linear and highly polar molecule, with a significant dipole pointing from C to O.<\/li>\n\n\n\n<li><strong>Dipole moment: ~0.1\u20130.2 D<\/strong>, but has significant polarity due to uneven electron distribution.<\/li>\n\n\n\n<li><strong>Dipole-dipole forces: Moderate<\/strong><\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Conclusion:<\/h3>\n\n\n\n<p>Among the choices, <strong>AsH\u2083 has the weakest dipole-dipole interactions<\/strong> due to:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Very small electronegativity difference between As and H.<\/li>\n\n\n\n<li>Low dipole moment.<\/li>\n\n\n\n<li>Resulting in <strong>very weak molecular polarity<\/strong>, and hence, <strong>the smallest dipole-dipole forces<\/strong>.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Which has the smallest dipole-dipole forces? A. CH3 CIB. HCIC. AsH3D. CO The correct answer and explanation is : The correct answer is: C. AsH\u2083 Explanation: Dipole-dipole forces are a type of intermolecular force that arise between polar molecules\u2014those that have permanent dipoles due to differences in electronegativity between atoms and the molecular geometry. The [&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-210350","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/210350","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=210350"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/210350\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=210350"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=210350"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=210350"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}