{"id":23313,"date":"2024-04-15T06:32:01","date_gmt":"2024-04-15T06:32:01","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=23313"},"modified":"2024-04-15T06:32:01","modified_gmt":"2024-04-15T06:32:01","slug":"iron-and-manganese-present-as-pollutants-in-water-cannot-be-removed-by________-a-oxidation-followed-by-settling-and-filtration-b-chlorination-c-ion-exchange-process-d-lime-soda-process-or-manganes","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/iron-and-manganese-present-as-pollutants-in-water-cannot-be-removed-by________-a-oxidation-followed-by-settling-and-filtration-b-chlorination-c-ion-exchange-process-d-lime-soda-process-or-manganes\/","title":{"rendered":"Iron and manganese present as pollutants in water cannot be removed by________ A. Oxidation followed by settling and filtration B. Chlorination C. Ion exchange process D. Lime soda process or manganese zeolite process"},"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_6aaff6b2d2c69\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"true\">\r\n                    Oxidation followed by settling and filtration                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    Chlorination                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    Ion exchange process                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    Lime soda process or manganese zeolite process                <\/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: A. Oxidation followed by settling and filtration.<\/p>\n<p>Iron and manganese are common water pollutants that can cause a variety of problems, including discoloration, staining, and taste and odor problems. They can also be harmful to human health.<\/p>\n<p>There are a number of methods that can be used to remove iron and manganese from water. One common method is oxidation followed by settling and filtration. In this process, the iron and manganese are oxidized to their ferric and manganic forms, which are then precipitated out of solution. The precipitate is then removed by filtration.<\/p>\n<p>However, this method is not effective for removing all forms of iron and manganese. For example, it is not effective for removing iron and manganese that are present in organic matter. In these cases, other methods, such as ion exchange or lime soda softening, may be necessary.<\/p>\n<p>Ion exchange is a process in which ions in solution are exchanged for ions on a resin. In the case of iron and manganese removal, the resin is typically a strong base anion exchange resin. The iron and manganese ions are exchanged for chloride ions, which are then removed from the water by rinsing the resin with a brine <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> solution.<\/p>\n<p>Lime soda softening <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> is a process in which calcium and magnesium ions in solution are removed by precipitation. In this process, lime (calcium oxide) and soda ash (sodium carbonate) are added to the water. The calcium and magnesium ions react with the lime and soda ash to form calcium carbonate and magnesium hydroxide, which are then precipitated out of solution.<\/p>\n<p>Both ion exchange and lime soda softening are effective methods for removing iron and manganese from water. However, they are more expensive than oxidation followed by settling and filtration. The choice of method will depend on the specific characteristics of the water and the desired level of treatment.<\/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>Iron and manganese present as pollutants in water cannot be removed by________ A. Oxidation followed by settling and filtration B. Chlorination C. Ion exchange process D. 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