{"id":233981,"date":"2025-06-13T16:11:42","date_gmt":"2025-06-13T16:11:42","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=233981"},"modified":"2025-06-13T16:11:44","modified_gmt":"2025-06-13T16:11:44","slug":"which-pair-of-molecules-has-the-strongest-dipole-dipole-interactions-2","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/13\/which-pair-of-molecules-has-the-strongest-dipole-dipole-interactions-2\/","title":{"rendered":"Which pair of molecules has the strongest dipole-dipole interactions"},"content":{"rendered":"\n

Which pair of molecules has the strongest dipole-dipole interactions? COz and COz CHa and CHa NHz and CH, COz and CH: NH, and NH;<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

Correct Answer:<\/strong> NH\u2083 and NH\u2083<\/strong><\/p>\n\n\n\n

Explanation<\/h3>\n\n\n\n

Intermolecular forces (IMFs) are the attractive or repulsive forces that exist between neighboring molecules. The strength of these forces dictates many of a substance’s physical properties, such as boiling point and melting point. One of the principal types of IMFs is the dipole-dipole interaction<\/strong>, which occurs specifically between polar molecules.<\/p>\n\n\n\n

A molecule is considered polar if it possesses a permanent net dipole moment. This arises from two conditions: the presence of polar covalent bonds (due to a significant difference in electronegativity between bonded atoms) and an asymmetrical molecular geometry that prevents these bond dipoles from canceling each other out.<\/p>\n\n\n\n

Let’s analyze the molecules in question:<\/p>\n\n\n\n

    \n
  • CO\u2082 (Carbon Dioxide):<\/strong>\u00a0The C=O bonds are polar. However, the molecule has a linear and symmetrical shape (O=C=O). The two bond dipoles are equal in magnitude and point in opposite directions, causing them to cancel out. Therefore, CO\u2082 is a nonpolar molecule.<\/li>\n\n\n\n
  • CH\u2084 (Methane):<\/strong>\u00a0The C-H bonds have a very small electronegativity difference and are considered essentially nonpolar. Furthermore, the molecule has a perfectly symmetrical tetrahedral geometry. Thus, CH\u2084 is a nonpolar molecule.<\/li>\n\n\n\n
  • NH\u2083 (Ammonia):<\/strong>\u00a0The N-H bonds are highly polar because nitrogen is significantly more electronegative than hydrogen. The molecule has a trigonal pyramidal shape due to the lone pair of electrons on the nitrogen atom. This asymmetry means the bond dipoles do not cancel, giving NH\u2083 a strong net dipole moment.<\/li>\n<\/ul>\n\n\n\n

    Evaluating the pairs, we find that only the NH\u2083 and NH\u2083 pair consists of two polar molecules. The partially negative nitrogen atom of one ammonia molecule is strongly attracted to the partially positive hydrogen atoms of a neighboring ammonia molecule. This attraction is the dipole-dipole interaction. In fact, because the interaction involves a hydrogen atom bonded to a highly electronegative atom (N, O, or F), this specific type of dipole-dipole force is known as hydrogen bonding<\/strong>, which is exceptionally strong. The other pairs, composed of nonpolar molecules, only exhibit weak London dispersion forces and thus lack dipole-dipole interactions entirely.thumb_upthumb_down<\/p>\n\n\n\n

    \"\"<\/figure>\n","protected":false},"excerpt":{"rendered":"

    Which pair of molecules has the strongest dipole-dipole interactions? COz and COz CHa and CHa NHz and CH, COz and CH: NH, and NH; The Correct Answer and Explanation is: Correct Answer: NH\u2083 and NH\u2083 Explanation Intermolecular forces (IMFs) are the attractive or repulsive forces that exist between neighboring molecules. The strength of these forces dictates […]<\/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-233981","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/233981","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=233981"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/233981\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=233981"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=233981"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=233981"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}