{"id":19929,"date":"2024-04-15T05:46:07","date_gmt":"2024-04-15T05:46:07","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=19929"},"modified":"2024-04-15T05:46:07","modified_gmt":"2024-04-15T05:46:07","slug":"the-number-of-signals-that-appear-in-the-broad-band-decoupled-13c-nmr-spectrum-of-ortho-meta-and-para-dichlorobenzene-respectively-are-a-3-4-and-2-b-3-3-and-2-c-4-4-and-2-d-3-4-and-4","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-number-of-signals-that-appear-in-the-broad-band-decoupled-13c-nmr-spectrum-of-ortho-meta-and-para-dichlorobenzene-respectively-are-a-3-4-and-2-b-3-3-and-2-c-4-4-and-2-d-3-4-and-4\/","title":{"rendered":"The number of signals that appear in the broad-band decoupled 13C NMR spectrum of ortho, meta and para-dichlorobenzene, respectively are A. 3, 4 and 2 B. 3, 3 and 2 C. 4, 4 and 2 D. 3, 4 and 4"},"content":{"rendered":"<p>\r\n    <!-- Check if it's an AMP page -->\r\n            <!-- Non-AMP version -->\r\n        <div class=\"mcq-container\" data-quiz-id=\"quizState_6a9a3737241f6\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"true\">\r\n                    3, 4 and 2                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    3, 3 and 2                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    4, 4 and 2                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    3, 4 and 4                <\/div>\r\n                            \r\n            <!-- Feedback messages for non-AMP -->\r\n            <div class=\"feedback\" data-feedback=\"wrong\">Answer is Right!<\/div>\r\n            <div class=\"feedback\" data-feedback=\"right\">Answer is Wrong!<\/div>\r\n        <\/div>\r\n\r\n        <script>\r\n        document.addEventListener('DOMContentLoaded', function () {\r\n            var containers = document.querySelectorAll('.mcq-container');\r\n\r\n            containers.forEach(function(container) {\r\n                var options = container.querySelectorAll('.option');\r\n                var feedbackSelect = container.querySelector('[data-feedback=\"select\"]');\r\n                var feedbackWrong = container.querySelector('[data-feedback=\"wrong\"]');\r\n                var feedbackRight = container.querySelector('[data-feedback=\"right\"]');\r\n\r\n                options.forEach(function(option) {\r\n                    option.addEventListener('click', function() {\r\n                        var selectedOption = option.getAttribute('data-option-key');\r\n                        var isCorrect = option.getAttribute('data-is-correct') === 'true';\r\n\r\n                        \/\/ Remove previous selections\r\n                        options.forEach(function(opt) {\r\n                            opt.classList.remove('correct', 'incorrect');\r\n                        });\r\n\r\n                        \/\/ Add the correct\/incorrect class\r\n                        if (isCorrect) {\r\n                            option.classList.add('correct');\r\n                            feedbackRight.hidden = false;\r\n                            feedbackWrong.hidden = true;\r\n                        } else {\r\n                            option.classList.add('incorrect');\r\n                            feedbackRight.hidden = true;\r\n                            feedbackWrong.hidden = false;\r\n                        }\r\n\r\n                        \/\/ Hide select feedback\r\n                        feedbackSelect.hidden = true;\r\n                    });\r\n                });\r\n            });\r\n        });\r\n        <\/script>\r\n    \r\n    <!--more--><\/p>\n<p>The correct answer is: <strong>A. 3, 4 and 2<\/strong><\/p>\n<p>In a broad-band decoupled 13C NMR spectrum, each carbon atom will produce a single signal, with the chemical shift being determined by the electronegativity of the atoms bonded to the carbon. In ortho-dichlorobenzene, the three carbon atoms are all equivalent, so they will produce a single signal. In meta-dichlorobenzene, the two carbon atoms in the middle are equivalent, while the two carbon atoms on the ends are different. This means that there will be two signals in the spectrum, one for the two equivalent carbon atoms and one for the two different carbon atoms. In para-dichlorobenzene, all four carbon atoms are equivalent, so they will produce a single signal.<\/p>\n<p>Here is a diagram of the three isomers of dichlorobenzene, with the carbon atoms labeled:<\/p>\n<p>In ortho-dichlorobenzene, the three carbon atoms are all equivalent, so they will produce a single signal. In meta-dichlorobenzene, the two carbon atoms in the middle are equivalent, while the two carbon atoms on the ends are different. This means that there will be two signals in the spectrum, one for the two equivalent carbon atoms and one for the two different carbon atoms. In para-dichlorobenzene, all four carbon atoms are equivalent, so they will <div class=\"youtube-subscribe-container\">\r\n        <a href=\"https:\/\/www.youtube.com\/channel\/UCNHT8lW-JmLC68rjBfZhdkg?sub_confirmation=1\" target=\"_blank\" class=\"youtube-subscribe-button\">\r\n            <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                  <div class=\"telegram-channel-container\">\r\n        <a href=\"https:\/\/t.me\/pscnotes2025\" target=\"_blank\" class=\"telegram-channel-button\">\r\n            <span class=\"telegram-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 496 512\">\r\n                    <path fill=\"white\" d=\"M248,8C111,8,0,119,0,256s111,248,248,248s248-111,248-248S385,8,248,8z M362,177L320,367c-3,14-10,18-20,14l-56-41l-27,26 c-3,3-5,5-10,5l4-63L323,196c5-5-1-7-8-3l-98,62l-42-13c-9-3-10-9,2-14l162-63C351,160,365,164,362,177z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Join Our Telegram Channel\r\n        <\/a>\r\n    <\/div>   <path d=\"M549.7 124.1c-6.3-23.7-24.8-42.3-48.3-48.6C458.8 64 288 64 288 64S117.2 64 74.6 75.5c-23.5 6.3-42 24.9-48.3 48.6-11.4 42.9-11.4 132.3-11.4 132.3s0 89.4 11.4 132.3c6.3 23.7 24.8 41.5 48.3 47.8C117.2 448 288 448 288 448s170.8 0 213.4-11.5c23.5-6.3 42-24.2 48.3-47.8 11.4-42.9 11.4-132.3 11.4-132.3s0-89.4-11.4-132.3zm-317.5 213.5V175.2l142.7 81.2-142.7 81.2z\"\/>\r\n                <\/svg>\r\n            <\/span>\r\n            Subscribe on YouTube\r\n        <\/a>\r\n    <\/div> produce a single signal.<\/p>\n<p>Here is a table showing the number of signals expected in the broad-band decoupled 13C NMR spectrum of each isomer of dichlorobenzene:<\/p>\n<p>Isomer | Number of signals<br \/>\n&#8212;&#8212;- | &#8212;&#8212;&#8211;<br \/>\nOrtho-dichlorobenzene | 3<br \/>\nMeta-dichlorobenzene | 2<br \/>\nPara-dichlorobenzene | 1<\/p>\n","protected":false},"excerpt":{"rendered":"<p>Join Our Telegram Channel Subscribe on YouTube<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[688],"tags":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>The number of signals that appear in the broad-band decoupled 13C NMR spectrum of ortho, meta and para-dichlorobenzene, respectively are A. 3, 4 and 2 B. 3, 3 and 2 C. 4, 4 and 2 D. 3, 4 and 4<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" 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