{"id":268811,"date":"2025-07-24T08:26:43","date_gmt":"2025-07-24T08:26:43","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=268811"},"modified":"2025-07-24T08:26:45","modified_gmt":"2025-07-24T08:26:45","slug":"which-of-the-following-is-most-polar","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/24\/which-of-the-following-is-most-polar\/","title":{"rendered":"Which of the following is most polar"},"content":{"rendered":"\n

Which of the following is most polar? CH3CH2OH CH3CH2CH2CH2CH2OH CH3OH CH3CH2CH2CH2OH<\/p>\n\n\n\n

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

The most polar molecule in the given list is CH3OH<\/strong> (methanol).<\/p>\n\n\n\n

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

Polarity in molecules is determined by the presence and strength of polar bonds and the molecular geometry. Polar bonds occur when there is a significant difference in electronegativity between atoms, creating a dipole moment. The overall polarity of a molecule depends on both the individual dipoles of the bonds and how they are arranged.<\/p>\n\n\n\n

Let’s break down the molecules:<\/p>\n\n\n\n

    \n
  1. CH3CH2OH (ethanol)<\/strong>: Ethanol has a hydroxyl group (-OH), which is highly polar. However, the molecule also contains a relatively long nonpolar ethyl group (CH2CH3), which reduces the overall polarity of the molecule. Still, the hydroxyl group contributes to its polarity.<\/li>\n\n\n\n
  2. CH3CH2CH2CH2CH2OH (pentanol)<\/strong>: Pentanol has a longer nonpolar alkyl chain (pentyl group) and a hydroxyl group (-OH). The longer the nonpolar chain, the less polar the molecule overall, as the nonpolar portion dominates.<\/li>\n\n\n\n
  3. CH3OH (methanol)<\/strong>: Methanol has a single -OH group and a very short nonpolar methyl group (CH3). The -OH group is highly polar, and since there are no long nonpolar chains to counteract the polarity, methanol is the most polar molecule among the given options.<\/li>\n\n\n\n
  4. CH3CH2CH2CH2OH (butanol)<\/strong>: Butanol has a hydroxyl group, but it also has a longer nonpolar alkyl chain (butyl group). The longer the alkyl chain, the less polar the molecule becomes compared to methanol or ethanol.<\/li>\n<\/ol>\n\n\n\n

    Why Methanol is the Most Polar:<\/h3>\n\n\n\n
      \n
    • Hydrogen bonding<\/strong>: Methanol can form strong hydrogen bonds due to its -OH group. This increases its polarity compared to the other molecules.<\/li>\n\n\n\n
    • Short nonpolar chain<\/strong>: The small nonpolar methyl group (CH3) in methanol doesn\u2019t significantly affect the overall polarity of the molecule, allowing the -OH group to dominate the molecular polarity.<\/li>\n<\/ul>\n\n\n\n

      In summary, methanol (CH3OH) is the most polar because of its small size, strong hydrogen bonding potential, and dominant hydroxyl group.<\/p>\n\n\n\n

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

      Which of the following is most polar? CH3CH2OH CH3CH2CH2CH2CH2OH CH3OH CH3CH2CH2CH2OH The Correct Answer and Explanation is: The most polar molecule in the given list is CH3OH (methanol). Explanation: Polarity in molecules is determined by the presence and strength of polar bonds and the molecular geometry. Polar bonds occur when there is a significant difference […]<\/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-268811","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/268811","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=268811"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/268811\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=268811"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=268811"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=268811"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}