{"id":7092,"date":"2024-04-15T02:39:11","date_gmt":"2024-04-15T02:39:11","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=7092"},"modified":"2024-04-15T02:39:11","modified_gmt":"2024-04-15T02:39:11","slug":"alum-as-a-coagulant-is-found-to-be-most-effective-when-ph-range-of-water-is-a-2-to-4-b-4-to-6-c-6-to-8-d-8-to-10","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/alum-as-a-coagulant-is-found-to-be-most-effective-when-ph-range-of-water-is-a-2-to-4-b-4-to-6-c-6-to-8-d-8-to-10\/","title":{"rendered":"Alum as a coagulant is found to be most effective when pH range of water is A. 2 to 4 B. 4 to 6 C. 6 to 8 D. 8 to 10"},"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_6a99d0a1db495\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"true\">\r\n                    2 to 4                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    4 to 6                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    6 to 8                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    8 to 10                <\/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: Alum as a coagulant is found to be most effective when pH range of water is 6 to 8.<\/p>\n<p>Alum is a chemical compound with the formula Al2(SO4)3\u00c2\u00b714H2O. It is a white, water-soluble solid that is commonly used <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 <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>        <\/a>\r\n    <\/div> as a coagulant in water treatment. Coagulation is the process of causing particles in a suspension to clump together and settle out of the water. Alum is effective at this because it has a positive charge, which attracts negatively charged particles in the water. When these particles clump together, they form larger particles that are more easily removed from the water.<\/p>\n<p>The pH of water is a measure of its acidity or alkalinity. A pH of 7 is neutral, a pH below 7 is acidic, and a pH above 7 is alkaline. The pH of water can affect the effectiveness of alum as a coagulant. In general, alum is most effective at pH values between 6 and 8. This is because the positive charge of alum is most effective at attracting negatively charged particles at these pH values.<\/p>\n<p>At pH values below 6, the negative charge of the water molecules is stronger than the positive charge of the alum. This makes it more difficult for the alum to attract and coagulate the particles in the water. At pH values above 8, the positive charge of the water molecules is weaker than the positive charge of the alum. This also makes it more difficult for the alum to attract and coagulate the particles in the water.<\/p>\n<p>Therefore, the pH range of 6 to 8 is the most effective for using alum as a coagulant.<\/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":[647],"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>Alum as a coagulant is found to be most effective when pH range of water is A. 2 to 4 B. 4 to 6 C. 6 to 8 D. 8 to 10<\/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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