{"id":2298,"date":"2025-05-12T09:38:17","date_gmt":"2025-05-12T04:08:17","guid":{"rendered":"https:\/\/leverageedu.com\/questions-answers\/?p=2298"},"modified":"2025-05-12T09:38:20","modified_gmt":"2025-05-12T04:08:20","slug":"the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse","status":"publish","type":"post","link":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/","title":{"rendered":"The correct sequence of increasing covalent character is represented by"},"content":{"rendered":"\n

Answer:<\/strong> The correct sequence of increasing covalent character is NaCl < LiCl < BeCl\u2082. According to Fajan\u2019s Rules, covalent character increases with smaller cation size and higher positive charge. Na\u207a is large and +1, Li\u207a is smaller and +1, while Be\u00b2\u207a is very small and +2, making BeCl\u2082 the most covalent. Also, covalent character increases as the electronegativity difference between atoms decreases. Be\u2013Cl has the lowest electronegativity difference, so it is the most covalent. Thus, considering both polarization and electronegativity, NaCl is the most ionic and BeCl\u2082 the most covalent. Hence, option (D)<\/strong> is correct.<\/p>\n\n\n\n

Complete Answer: <\/strong><\/p>\n\n\n\n

Let\u2019s understand why only one option is correct and the others are incorrect:<\/p>\n\n\n\n

Option (A): BeCl\u2082 < LiCl < NaCl \u2014 <\/strong>This option is completely incorrect because it wrongly places BeCl\u2082 as the least covalent compound. According to Fajan\u2019s Rules, Be\u00b2\u207a has the highest charge and the smallest size, which gives it the highest polarizing power, and thus BeCl\u2082 should be the most covalent, not the least. Na\u207a is the largest cation with the lowest polarizing ability, so NaCl is the most ionic, not the most covalent as this option implies. Therefore, this sequence violates both the size\/charge logic and electronegativity difference rule, making it entirely incorrect.<\/p>\n\n\n\n

Option (B): LiCl < NaCl < BeCl\u2082 \u2014 <\/strong>This option is partially correct because it correctly places BeCl\u2082 as the most covalent compound. However, it incorrectly suggests that NaCl is more covalent than LiCl, which is false. Lithium ion (Li\u207a) is smaller than sodium ion (Na\u207a) and therefore has a higher polarizing power, making LiCl more covalent than NaCl. By placing NaCl in the middle, this option violates Fajan\u2019s Rules, which clearly indicate that smaller cations lead to greater covalent character. Hence, although BeCl\u2082 is correctly positioned, the rest of the sequence is flawed.<\/p>\n\n\n\n

Option (C): BeCl\u2082 < NaCl < LiCl \u2014 <\/strong>This option also places BeCl\u2082 at the beginning, wrongly implying it has the least covalent character, which is scientifically incorrect. As explained earlier, Be\u00b2\u207a, due to its small size and high charge, leads to maximum polarization and hence forms a highly covalent compound. Also, it incorrectly ranks NaCl as more covalent than LiCl, which again goes against Fajan\u2019s Rules because Na\u207a is larger and less polarizing than Li\u207a. Therefore, both the placement of BeCl\u2082 and the ordering between NaCl and LiCl are wrong in this option.<\/p>\n\n\n\n

Option (D): NaCl < LiCl < BeCl\u2082 \u2014 <\/strong>This option correctly follows Fajan\u2019s Rules and the concept of electronegativity difference. Sodium ion (Na\u207a) is the largest and has a +1 charge, so it causes very little distortion of the chloride ion (Cl\u207b) electron cloud, making NaCl the most ionic and least covalent. Lithium ion (Li\u207a) is smaller than Na\u207a, so it polarizes Cl\u207b more, giving LiCl more covalent character than NaCl. Beryllium ion (Be\u00b2\u207a) is very small and has a +2 charge, which causes strong polarization of Cl\u207b, resulting in maximum covalent character in BeCl\u2082. Also, Be\u2013Cl has the smallest electronegativity difference, reinforcing its covalent nature. Hence, this is the correct order of increasing covalent character.<\/p>\n\n\n\n

Hence, only option (D) correctly follows the trend based on cationic size, charge, and electronegativity differences, giving the true order of increasing covalent character as NaCl < LiCl < BeCl\u2082. All other options either misplace BeCl\u2082 or incorrectly order NaCl and LiCl.<\/p>\n\n\n\n

Common Chemistry Doubts:<\/strong><\/p>\n\n\n\n

Why is Calcium Sulphate Hemihydrate called Plaster of Paris?<\/strong><\/a><\/td>What is the Formula Mass of the Iodine Molecule?<\/strong><\/a><\/td><\/tr>
Write Down the Name of the Functional Group of \u2013CHO<\/strong><\/a><\/td>What Do You Mean by a Precipitation Reaction?<\/strong><\/a><\/td><\/tr>
What Do You Mean by Polar Protic and Polar Aprotic Solvents?<\/strong><\/a><\/td>Why is ice at 273K more effective in cooling than water at the same temperature?<\/strong><\/a><\/td><\/tr>
What is threshold energy?<\/strong><\/a><\/td>What are the bond angles of a molecule with trigonal bipyramidal geometry?<\/strong><\/a><\/td><\/tr><\/tbody><\/table><\/figure>\n","protected":false},"excerpt":{"rendered":"Answer: The correct sequence of increasing covalent character is NaCl < LiCl < BeCl\u2082. According to Fajan\u2019s Rules,…\n","protected":false},"author":115,"featured_media":2307,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"editor_notices":[],"footnotes":""},"categories":[10,4],"tags":[],"class_list":{"0":"post-2298","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-chemistry","8":"category-science"},"yoast_head":"\nThe correct sequence of increasing covalent character is represented by<\/title>\n<meta name=\"description\" content=\"Understand the correct order of increasing covalent character among NaCl, LiCl, and BeCl\u2082 using Fajan\u2019s Rules and electronegativity differences, with detailed explanations for each option.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The correct sequence of increasing covalent character is represented by\" \/>\n<meta property=\"og:description\" content=\"Understand the correct order of increasing covalent character among NaCl, LiCl, and BeCl\u2082 using Fajan\u2019s Rules and electronegativity differences, with detailed explanations for each option.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/\" \/>\n<meta property=\"og:site_name\" content=\"Questions & Answers\" \/>\n<meta property=\"article:published_time\" content=\"2025-05-12T04:08:17+00:00\" \/>\n<meta property=\"article:modified_time\" content=\"2025-05-12T04:08:20+00:00\" \/>\n<meta property=\"og:image\" content=\"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/5\/2025\/05\/10183753\/The-correct-sequence-of-increasing-covalent-character-is-represented-by.webp\" \/>\n\t<meta property=\"og:image:width\" content=\"1024\" \/>\n\t<meta property=\"og:image:height\" content=\"640\" \/>\n\t<meta property=\"og:image:type\" content=\"image\/webp\" \/>\n<meta name=\"author\" content=\"Mohit Rajak\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"Mohit Rajak\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"3 minutes\" \/>\n<!-- \/ Yoast SEO plugin. -->","yoast_head_json":{"title":"The correct sequence of increasing covalent character is represented by","description":"Understand the correct order of increasing covalent character among NaCl, LiCl, and BeCl\u2082 using Fajan\u2019s Rules and electronegativity differences, with detailed explanations for each option.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/","og_locale":"en_US","og_type":"article","og_title":"The correct sequence of increasing covalent character is represented by","og_description":"Understand the correct order of increasing covalent character among NaCl, LiCl, and BeCl\u2082 using Fajan\u2019s Rules and electronegativity differences, with detailed explanations for each option.","og_url":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/","og_site_name":"Questions & Answers","article_published_time":"2025-05-12T04:08:17+00:00","article_modified_time":"2025-05-12T04:08:20+00:00","og_image":[{"width":1024,"height":640,"url":"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/5\/2025\/05\/10183753\/The-correct-sequence-of-increasing-covalent-character-is-represented-by.webp","type":"image\/webp"}],"author":"Mohit Rajak","twitter_card":"summary_large_image","twitter_misc":{"Written by":"Mohit Rajak","Est. reading time":"3 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Article","@id":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/#article","isPartOf":{"@id":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/"},"author":{"name":"Mohit Rajak","@id":"https:\/\/leverageedu.com\/questions-answers\/#\/schema\/person\/397ac1e3cf645bddda6f314b3308005b"},"headline":"The correct sequence of increasing covalent character is represented by","datePublished":"2025-05-12T04:08:17+00:00","dateModified":"2025-05-12T04:08:20+00:00","mainEntityOfPage":{"@id":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/"},"wordCount":642,"commentCount":0,"image":{"@id":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/#primaryimage"},"thumbnailUrl":"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/5\/2025\/05\/10183753\/The-correct-sequence-of-increasing-covalent-character-is-represented-by.webp","articleSection":["Chemistry","Science"],"inLanguage":"en-US","potentialAction":[{"@type":"CommentAction","name":"Comment","target":["https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/#respond"]}]},{"@type":"WebPage","@id":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/","url":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/","name":"The correct sequence of increasing covalent character is represented by","isPartOf":{"@id":"https:\/\/leverageedu.com\/questions-answers\/#website"},"primaryImageOfPage":{"@id":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/#primaryimage"},"image":{"@id":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/#primaryimage"},"thumbnailUrl":"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/5\/2025\/05\/10183753\/The-correct-sequence-of-increasing-covalent-character-is-represented-by.webp","datePublished":"2025-05-12T04:08:17+00:00","dateModified":"2025-05-12T04:08:20+00:00","author":{"@id":"https:\/\/leverageedu.com\/questions-answers\/#\/schema\/person\/397ac1e3cf645bddda6f314b3308005b"},"description":"Understand the correct order of increasing covalent character among NaCl, LiCl, and BeCl\u2082 using Fajan\u2019s Rules and electronegativity differences, with detailed explanations for each option.","breadcrumb":{"@id":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/"]}]},{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/#primaryimage","url":"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/5\/2025\/05\/10183753\/The-correct-sequence-of-increasing-covalent-character-is-represented-by.webp","contentUrl":"https:\/\/blogassets.leverageedu.com\/media\/uploads\/sites\/5\/2025\/05\/10183753\/The-correct-sequence-of-increasing-covalent-character-is-represented-by.webp","width":1024,"height":640,"caption":"The correct sequence of increasing covalent character is represented by"},{"@type":"BreadcrumbList","@id":"https:\/\/leverageedu.com\/questions-answers\/the-correct-sequence-of-increasing-covalent-character-is-represented-by-class-12-chemistry-cbse\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/leverageedu.com\/questions-answers\/"},{"@type":"ListItem","position":2,"name":"The correct sequence of increasing covalent character is represented by"}]},{"@type":"WebSite","@id":"https:\/\/leverageedu.com\/questions-answers\/#website","url":"https:\/\/leverageedu.com\/questions-answers\/","name":"Questions & Answers","description":"We Help Build Awesome Careers","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/leverageedu.com\/questions-answers\/?s={search_term_string}"},"query-input":{"@type":"PropertyValueSpecification","valueRequired":true,"valueName":"search_term_string"}}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/leverageedu.com\/questions-answers\/#\/schema\/person\/397ac1e3cf645bddda6f314b3308005b","name":"Mohit Rajak","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/secure.gravatar.com\/avatar\/093f38769270ccfe9d0812e2f23b6fe26cf8c7ceb4e4ace3482fdd4b80b122e9?s=96&d=mm&r=g","url":"https:\/\/secure.gravatar.com\/avatar\/093f38769270ccfe9d0812e2f23b6fe26cf8c7ceb4e4ace3482fdd4b80b122e9?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/093f38769270ccfe9d0812e2f23b6fe26cf8c7ceb4e4ace3482fdd4b80b122e9?s=96&d=mm&r=g","caption":"Mohit Rajak"},"description":"I\u2019m Mohit Rajak, a soul deeply entwined with the rhythm of words. I find peace and purpose in crafting verses that dance between the lines of poetry. With my pen as my wand, I weave intricate tales and heartfelt musings, breathing life into the blank canvas of each page. Blogging is my window to the world way of sharing thoughts, emotions, and a perspective uniquely my own. Every word I write is a brushstroke in the ever-evolving painting of my literary journey.","sameAs":["https:\/\/www.instagram.com\/xx_a.m.strings_xiv\/","https:\/\/www.linkedin.com\/in\/mohit-rajak-a9a5a2162\/"],"url":"https:\/\/leverageedu.com\/questions-answers\/author\/mohit\/"}]}},"acf":[],"_links":{"self":[{"href":"https:\/\/leverageedu.com\/questions-answers\/wp-json\/wp\/v2\/posts\/2298","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/leverageedu.com\/questions-answers\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/leverageedu.com\/questions-answers\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/leverageedu.com\/questions-answers\/wp-json\/wp\/v2\/users\/115"}],"replies":[{"embeddable":true,"href":"https:\/\/leverageedu.com\/questions-answers\/wp-json\/wp\/v2\/comments?post=2298"}],"version-history":[{"count":1,"href":"https:\/\/leverageedu.com\/questions-answers\/wp-json\/wp\/v2\/posts\/2298\/revisions"}],"predecessor-version":[{"id":2308,"href":"https:\/\/leverageedu.com\/questions-answers\/wp-json\/wp\/v2\/posts\/2298\/revisions\/2308"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/leverageedu.com\/questions-answers\/wp-json\/wp\/v2\/media\/2307"}],"wp:attachment":[{"href":"https:\/\/leverageedu.com\/questions-answers\/wp-json\/wp\/v2\/media?parent=2298"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/leverageedu.com\/questions-answers\/wp-json\/wp\/v2\/categories?post=2298"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/leverageedu.com\/questions-answers\/wp-json\/wp\/v2\/tags?post=2298"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}