{"id":268788,"date":"2025-07-24T08:16:46","date_gmt":"2025-07-24T08:16:46","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=268788"},"modified":"2025-07-24T08:16:48","modified_gmt":"2025-07-24T08:16:48","slug":"which-one-is-least-soluble-in-water","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/07\/24\/which-one-is-least-soluble-in-water\/","title":{"rendered":"Which one is least soluble in water"},"content":{"rendered":"\n

Which one is least soluble in water? a. CH3CH2OH b. CH3OCH3 c. CH3CH2CH2CH2CH2OH d. CH3OH e. CH3CH2CH2OH<\/p>\n\n\n\n

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

The least soluble compound in water is CH3OCH3<\/strong> (dimethyl ether).<\/p>\n\n\n\n

Here\u2019s why:<\/p>\n\n\n\n

Water solubility is mainly determined by the ability of a compound to form hydrogen bonds with water molecules. Compounds that are capable of hydrogen bonding tend to dissolve better in water, which is a highly polar solvent. Now, let’s analyze each compound:<\/p>\n\n\n\n

    \n
  1. CH3CH2OH (Ethanol)<\/strong>: Ethanol has both a polar -OH group and a non-polar ethyl group (-CH2CH3). The -OH group can form hydrogen bonds with water molecules, making ethanol quite soluble in water.<\/li>\n\n\n\n
  2. CH3OCH3 (Dimethyl ether)<\/strong>: This compound has an oxygen atom that can potentially form hydrogen bonds. However, the -OCH3 group is less effective in hydrogen bonding compared to alcohols, which have an -OH group. Furthermore, dimethyl ether is a smaller molecule with no additional polar groups like ethanol, making it less soluble in water.<\/li>\n\n\n\n
  3. CH3CH2CH2CH2CH2OH (Pentanol)<\/strong>: Pentanol, like ethanol, contains an -OH group, which can form hydrogen bonds with water. However, because it has a longer non-polar hydrocarbon chain, it is slightly less soluble than ethanol but still quite soluble due to the hydrogen bonding.<\/li>\n\n\n\n
  4. CH3OH (Methanol)<\/strong>: Methanol is highly soluble in water. The -OH group can readily form hydrogen bonds with water, making it very soluble.<\/li>\n\n\n\n
  5. CH3CH2CH2OH (Propanol)<\/strong>: Propanol, like ethanol and methanol, has an -OH group that can hydrogen bond with water molecules. It’s also quite soluble, though less than methanol or ethanol.<\/li>\n<\/ol>\n\n\n\n

    In conclusion, dimethyl ether (CH3OCH3)<\/strong> is the least soluble because it lacks the -OH group, which is essential for forming strong hydrogen bonds with water molecules. The other compounds all have hydroxyl groups (-OH), which enable them to form hydrogen bonds and dissolve more easily in water<\/p>\n\n\n\n

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

    Which one is least soluble in water? a. CH3CH2OH b. CH3OCH3 c. CH3CH2CH2CH2CH2OH d. CH3OH e. CH3CH2CH2OH The Correct Answer and Explanation is: The least soluble compound in water is CH3OCH3 (dimethyl ether). Here\u2019s why: Water solubility is mainly determined by the ability of a compound to form hydrogen bonds with water molecules. Compounds that […]<\/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-268788","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/268788","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=268788"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/268788\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=268788"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=268788"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=268788"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}