{"id":7644,"date":"2024-04-15T02:48:14","date_gmt":"2024-04-15T02:48:14","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=7644"},"modified":"2024-04-15T02:48:14","modified_gmt":"2024-04-15T02:48:14","slug":"the-presence-of-free-ammonia-in-sewage-is-detected-by-a-boiling-b-adding-potassium-permanganate-c-adding-sulphuric-acid-d-phenol-di-sulphuric-acid","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-presence-of-free-ammonia-in-sewage-is-detected-by-a-boiling-b-adding-potassium-permanganate-c-adding-sulphuric-acid-d-phenol-di-sulphuric-acid\/","title":{"rendered":"The presence of free ammonia in sewage, is detected by A. Boiling B. Adding potassium permanganate C. Adding sulphuric acid D. Phenol-di-sulphuric acid"},"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_6a9d4e05f3e27\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    Boiling                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    Adding potassium permanganate                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    Adding sulphuric acid                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"true\">\r\n                    Phenol-di-sulphuric acid                <\/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: D. Phenol-di-sulphuric acid.<\/p>\n<p>Phenol-di-sulphuric acid is a reagent that is used to detect the presence of free ammonia in sewage. When phenol-di-sulphuric acid is added to sewage, it reacts with the free ammonia to form a precipitate. The presence of the precipitate indicates that there is free ammonia in the sewage.<\/p>\n<p>Boiling, adding potassium permanganate, and adding sulphuric acid are not effective methods for detecting the presence of free ammonia in sewage. Boiling will cause the ammonia to evaporate, while adding potassium permanganate or sulphuric acid will react with the ammonia to form other compounds.<\/p>\n<p>Here is a more detailed explanation of each option:<\/p>\n<ul>\n<li>Option A: Boiling. Boiling will cause the ammonia to evaporate, so it is not an effective method for detecting the presence of free ammonia in sewage.<\/li>\n<li>Option B: Adding potassium permanganate. Potassium permanganate is a strong oxidizing agent, and it will react with the ammonia to form other compounds. This reaction will not produce a precipitate, so it is not an effective method for detecting the presence of free <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> ammonia in sewage.<\/li>\n<li>Option C: Adding sulphuric acid. Sulphuric acid is a strong acid, and it will react <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                    <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> with the ammonia to form ammonium sulphate. This reaction will not produce a precipitate, so it is not an effective method for detecting the presence of free ammonia in sewage.<\/li>\n<li>Option D: Phenol-di-sulphuric acid. Phenol-di-sulphuric acid is a reagent that is used to detect the presence of free ammonia in sewage. When phenol-di-sulphuric acid is added to sewage, it reacts with the free ammonia to form a precipitate. The presence of the precipitate indicates that there is free ammonia in the sewage.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>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":[650],"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 free ammonia in sewage, is detected by A. Boiling B. 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