{"id":23795,"date":"2024-04-15T06:38:21","date_gmt":"2024-04-15T06:38:21","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=23795"},"modified":"2024-04-15T06:38:21","modified_gmt":"2024-04-15T06:38:21","slug":"the-presence-of-cobalt-in-vitamin-b12-was-established-for-the-first-time-by-a-hydrolysis-test-b-spectroscopy-c-borax-bead-test-d-sodium-nitroprusside-test","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-presence-of-cobalt-in-vitamin-b12-was-established-for-the-first-time-by-a-hydrolysis-test-b-spectroscopy-c-borax-bead-test-d-sodium-nitroprusside-test\/","title":{"rendered":"The presence of Cobalt in Vitamin B12 was established for the first time by A. Hydrolysis test B. Spectroscopy C. Borax-Bead test D. Sodium Nitroprusside test"},"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_6a9d085c5b0f0\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    Hydrolysis test                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"true\">\r\n                    Spectroscopy                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    Borax-Bead test                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    Sodium Nitroprusside test                <\/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>B. Spectroscopy<\/strong><\/p>\n<p>Spectroscopy is a method of analysis that uses the interaction of matter and electromagnetic radiation to identify and quantify substances. It can be used to determine the presence of cobalt in vitamin B12 by measuring the absorption of light by the cobalt atom.<\/p>\n<p>Hydrolysis is a chemical reaction in which a molecule is broken down into smaller molecules by the addition of water. It is not a reliable method for determining the presence of cobalt in vitamin B12 because it can also break down other components of the vitamin.<\/p>\n<p>The Borax-Bead test is a qualitative test for cobalt. It is based on the formation of a blue-green precipitate when cobalt ions react with borax. However, this test is not specific for cobalt and can also be positive for <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            <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> <span class=\"youtube-icon\">\r\n                <svg xmlns=\"http:\/\/www.w3.org\/2000\/svg\" viewBox=\"0 0 576 512\">\r\n                    <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> other metals, such as nickel and copper.<\/p>\n<p>The Sodium Nitroprusside test is a qualitative test for cyanide. It is based on the formation of a red-purple precipitate when cyanide ions react with sodium nitroprusside. However, this test is not specific for cyanide and can also be positive for other compounds, such as thiocyanate and azide.<\/p>\n<p>Therefore, the only method that can be used to reliably determine the presence of cobalt in vitamin B12 is spectroscopy.<\/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":[19],"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 presence of Cobalt in Vitamin B12 was established for the first time by A. Hydrolysis test B. Spectroscopy C. Borax-Bead test D. 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