{"id":27245,"date":"2025-06-19T21:44:44","date_gmt":"2025-06-19T21:44:44","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=27245"},"modified":"2025-06-19T21:44:48","modified_gmt":"2025-06-19T21:44:48","slug":"which-of-the-following-statements-is-true-about-alkyl-halides","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/which-of-the-following-statements-is-true-about-alkyl-halides\/","title":{"rendered":"Which of the following statements is true about alkyl halides"},"content":{"rendered":"\n<p>Which of the following statements is true about alkyl halides? A. They undergo addition reactions B. They undergo hydration reactions C. The undergo elimination reaction when treated with KOH D. They form alcohols when oxidized E. They undergo elimination reaction when refluxed with NaOH 2<\/p>\n\n\n\n<p><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-vivid-cyan-blue-color\"><strong>The correct answer and explanation is:<\/strong><\/mark><\/p>\n\n\n\n<p><strong>Correct Answer: C. They undergo elimination reaction when treated with KOH<\/strong><\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>Explanation (Approx. 300 Words):<\/strong><\/h3>\n\n\n\n<p>Alkyl halides, also known as haloalkanes, are organic compounds containing one or more halogen atoms (F, Cl, Br, I) attached to an alkyl group. Their reactivity is mainly influenced by the polarity of the carbon-halogen bond, where the carbon bears a partial positive charge and the halogen bears a partial negative charge.<\/p>\n\n\n\n<p>Among the options given, <strong>Option C is correct: Alkyl halides undergo elimination reactions when treated with KOH<\/strong>, specifically <strong>hot alcoholic KOH<\/strong>. In this reaction, the <strong>halide ion is eliminated along with a hydrogen atom<\/strong> from an adjacent carbon, forming a <strong>double bond (alkene)<\/strong>. This is known as the <strong>E2 (bimolecular elimination) mechanism<\/strong>.<\/p>\n\n\n\n<p>The general reaction can be written as:<\/p>\n\n\n\n<p><strong>R\u2013CH\u2082\u2013CHX\u2013R&#8217; + KOH (alcohol, heat) \u2192 R\u2013CH=CH\u2013R&#8217; + KX + H\u2082O<\/strong><\/p>\n\n\n\n<p>Here\u2019s a brief analysis of why other options are <strong>incorrect<\/strong>:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>A. Addition reactions<\/strong> \u2013 These are typical of alkenes and alkynes, <strong>not alkyl halides<\/strong>.<\/li>\n\n\n\n<li><strong>B. Hydration reactions<\/strong> \u2013 This involves adding water across a double bond, again a feature of <strong>alkenes<\/strong>, <strong>not alkyl halides<\/strong>.<\/li>\n\n\n\n<li><strong>D. Oxidation to alcohols<\/strong> \u2013 This is <strong>incorrect<\/strong>. Alkyl halides are usually <strong>converted to alcohols via nucleophilic substitution<\/strong>, not oxidation.<\/li>\n\n\n\n<li><strong>E. Elimination with NaOH 2<\/strong> \u2013 While this sounds plausible, <strong>the more standard base for elimination is alcoholic KOH<\/strong>, not aqueous NaOH or \u201cNaOH 2,\u201d which seems unclear or possibly a typo.<\/li>\n<\/ul>\n\n\n\n<p>Thus, when an alkyl halide is <strong>heated with alcoholic KOH<\/strong>, it undergoes <strong>dehydrohalogenation<\/strong> (removal of HX) to form an <strong>alkene<\/strong> \u2014 a classic <strong>elimination reaction<\/strong>.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<p>\u2705 <strong>Final Answer: C. They undergo elimination reaction when treated with KOH<\/strong><\/p>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following statements is true about alkyl halides? A. They undergo addition reactions B. They undergo hydration reactions C. The undergo elimination reaction when treated with KOH D. They form alcohols when oxidized E. They undergo elimination reaction when refluxed with NaOH 2 The correct answer and explanation is: Correct Answer: C. They [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1],"tags":[],"class_list":["post-27245","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/27245","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/comments?post=27245"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/27245\/revisions"}],"predecessor-version":[{"id":27249,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/27245\/revisions\/27249"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=27245"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=27245"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=27245"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}