{"id":28408,"date":"2025-06-20T12:13:53","date_gmt":"2025-06-20T12:13:53","guid":{"rendered":"https:\/\/gaviki.com\/blog\/?p=28408"},"modified":"2025-06-20T12:13:54","modified_gmt":"2025-06-20T12:13:54","slug":"based-on-vsepr-theory-which-of-the-following-species-has-a-trigonal-pyramidal-shape","status":"publish","type":"post","link":"https:\/\/gaviki.com\/blog\/based-on-vsepr-theory-which-of-the-following-species-has-a-trigonal-pyramidal-shape\/","title":{"rendered":"Based on VSEPR theory, which of the following species has a trigonal pyramidal shape"},"content":{"rendered":"\n<p>Based on VSEPR theory, which of the following species has a trigonal pyramidal shape? Can be more than one answer. A. CO2 B. HCN C. CHCl3<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-light-green-cyan-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<p>C<strong>orrect Answer: None of the species (A. CO\u2082, B. HCN, C. CHCl\u2083) has a trigonal pyramidal shape.<\/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:<\/strong><\/h3>\n\n\n\n<p>The <strong>Valence Shell Electron Pair Repulsion (VSEPR) theory<\/strong> is used to predict the shapes of molecules based on the repulsions between electron pairs (bonding and lone pairs) around the central atom. A <strong>trigonal pyramidal<\/strong> molecular geometry occurs when:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The central atom has <strong>four regions of electron density<\/strong> (three bonding pairs and one lone pair),<\/li>\n\n\n\n<li>The ideal bond angle is approximately <strong>107\u00b0<\/strong>,<\/li>\n\n\n\n<li>The most common example is <strong>ammonia (NH\u2083)<\/strong>.<\/li>\n<\/ul>\n\n\n\n<p>Now let&#8217;s analyze the molecular shapes of the given species:<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\"><strong>A. CO\u2082 (Carbon Dioxide)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Central atom: Carbon<\/li>\n\n\n\n<li>Electron domains: Two double bonds (C=O on each side)<\/li>\n\n\n\n<li>No lone pairs on carbon<\/li>\n\n\n\n<li>Shape: <strong>Linear<\/strong><\/li>\n\n\n\n<li>Bond angle: 180\u00b0<\/li>\n\n\n\n<li><strong>Not trigonal pyramidal<\/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\"><strong>B. HCN (Hydrogen Cyanide)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Central atom: Carbon<\/li>\n\n\n\n<li>Electron domains: One single bond (C\u2013H) and one triple bond (C\u2261N)<\/li>\n\n\n\n<li>No lone pairs on carbon<\/li>\n\n\n\n<li>Shape: <strong>Linear<\/strong><\/li>\n\n\n\n<li>Bond angle: 180\u00b0<\/li>\n\n\n\n<li><strong>Not trigonal pyramidal<\/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\"><strong>C. CHCl\u2083 (Chloroform)<\/strong><\/h3>\n\n\n\n<ul class=\"wp-block-list\">\n<li>Central atom: Carbon<\/li>\n\n\n\n<li>Electron domains: Four single bonds (one to H, three to Cl atoms)<\/li>\n\n\n\n<li>No lone pairs on carbon<\/li>\n\n\n\n<li>Shape: <strong>Tetrahedral<\/strong><\/li>\n\n\n\n<li>Bond angle: ~109.5\u00b0<\/li>\n\n\n\n<li><strong>Not trigonal pyramidal<\/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\"><strong>Conclusion:<\/strong><\/h3>\n\n\n\n<p>For a molecule to have a <strong>trigonal pyramidal<\/strong> shape, the central atom must have <strong>three bonded atoms<\/strong> and <strong>one lone pair<\/strong>. None of the given species meet this requirement. Therefore, <strong>none of them<\/strong> have a trigonal pyramidal geometry.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img loading=\"lazy\" decoding=\"async\" width=\"852\" height=\"1024\" src=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-212.jpeg\" alt=\"\" class=\"wp-image-28409\" srcset=\"https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-212.jpeg 852w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-212-250x300.jpeg 250w, https:\/\/gaviki.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-212-768x923.jpeg 768w\" sizes=\"auto, (max-width: 852px) 100vw, 852px\" \/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Based on VSEPR theory, which of the following species has a trigonal pyramidal shape? Can be more than one answer. A. CO2 B. HCN C. CHCl3 The Correct Answer and Explanation is: Correct Answer: None of the species (A. CO\u2082, B. HCN, C. CHCl\u2083) has a trigonal pyramidal shape. Explanation: The Valence Shell Electron Pair [&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-28408","post","type-post","status-publish","format-standard","hentry","category-quiz-questions"],"_links":{"self":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/28408","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=28408"}],"version-history":[{"count":1,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/28408\/revisions"}],"predecessor-version":[{"id":28410,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/posts\/28408\/revisions\/28410"}],"wp:attachment":[{"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/media?parent=28408"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/categories?post=28408"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/gaviki.com\/blog\/wp-json\/wp\/v2\/tags?post=28408"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}