{"id":23188,"date":"2024-04-15T06:30:24","date_gmt":"2024-04-15T06:30:24","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=23188"},"modified":"2024-04-15T06:30:24","modified_gmt":"2024-04-15T06:30:24","slug":"of-the-following-which-one-pollutes-the-air-of-a-big-city-a-copper-b-chromium-c-lead-d-calcium","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/of-the-following-which-one-pollutes-the-air-of-a-big-city-a-copper-b-chromium-c-lead-d-calcium\/","title":{"rendered":"Of the following which one pollutes the air of a big city ? A. Copper B. Chromium C. Lead D. Calcium"},"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_6ab3611d64f8e\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    Copper                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"false\">\r\n                    Chromium                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"true\">\r\n                    Lead                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    Calcium                <\/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: C. Lead.<\/p>\n<p>Lead is a heavy metal that is toxic to humans and other animals. It can be found in the air, water, soil, and food. Lead pollution can cause a variety of health problems, including brain damage, learning disabilities, and reproductive problems.<\/p>\n<p>Lead is released into the environment from a variety of sources, including:<\/p>\n<ul>\n<li><strong>Gasoline:<\/strong> Lead was used as an additive in gasoline until it was banned in the United States in 1996. However, lead from gasoline can still be found in the environment, especially in areas where older cars are still used.<\/li>\n<li><strong>Paint:<\/strong> Lead <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> was used in paint until it was banned in the United States in 1978. Lead paint can still be found in older homes and buildings.<\/li>\n<li><strong>Smelting:<\/strong> Lead is a byproduct of smelting, which is the process of extracting metals from ores. Lead smelters can release lead into the air and water.<\/li>\n<li><strong>Batteries:<\/strong> Lead is used in batteries. When batteries are disposed of improperly, lead can be released into the environment.<\/li>\n<\/ul>\n<p>Lead pollution can be prevented by:<\/p>\n<ul>\n<li><strong>Reducing the use of lead in products:<\/strong> Lead should not be used in gasoline, paint, or other products.<\/li>\n<li><strong>Properly disposing of lead products:<\/strong> Lead products should be disposed of properly, not in landfills <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> or incinerators.<\/li>\n<li><strong>Reducing exposure to lead:<\/strong> People should avoid exposure to lead, especially children and pregnant women.<\/li>\n<\/ul>\n<p>If you are concerned about lead pollution, you can contact your local health department for more information.<\/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>Of the following which one pollutes the air of a big city ? 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