{"id":91256,"date":"2025-06-01T10:51:14","date_gmt":"2025-06-01T10:51:14","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=91256"},"modified":"2025-06-01T10:51:14","modified_gmt":"2025-06-01T10:51:14","slug":"with-reference-to-fly-ash-produced-by-the-power-plants-using-coal-as","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-fly-ash-produced-by-the-power-plants-using-coal-as\/","title":{"rendered":"With reference to &#8216;fly ash&#8217; produced by the power plants using coal as"},"content":{"rendered":"<p>With reference to &#8216;fly ash&#8217; produced by the power plants using coal as fuel, which of the following statements is\/are correct?<\/p>\n<ul>\n<li>1. Fly ash can be used in the production of bricks for building construction.<\/li>\n<li>2. Fly ash can be used as a replacement for some of the Portland cement contents of concrete.<\/li>\n<li>3. Fly ash is made up of silicon dioxide and calcium oxide only, and does not contain any toxic elements.<\/li>\n<\/ul>\n<p>Select the correct answer using the code given below.<\/p>\n<p>[amp_mcq option1=&#8221;1 and 2&#8243; option2=&#8221;2 only&#8221; option3=&#8221;1 and 3&#8243; option4=&#8221;3 only&#8221; correct=&#8221;option1&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC IAS &#8211; 2015<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-ias-2015.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-ias-2015\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nStatements 1 and 2 are correct regarding the uses of fly ash produced by power plants. Statement 3 is incorrect as fly ash contains more than just silicon dioxide and calcium oxide, and it can contain toxic elements.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nFly ash is a valuable by-product with established applications in construction materials. It is commonly used in manufacturing bricks and as a partial replacement for Portland cement in concrete mixes, improving properties like strength and durability. However, fly ash contains various metal oxides and trace elements, some of which can be toxic.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nFly ash typically consists primarily of silicon dioxide (SiO\u2082), aluminium oxide (Al\u2082O\u2083), iron oxide (Fe\u2082O\u2083), and calcium oxide (CaO). It also contains smaller amounts of magnesium oxide (MgO), titanium dioxide (TiO\u2082), sulphur trioxide (SO\u2083), and trace amounts of other elements, including heavy metals like arsenic, mercury, and lead, depending on the source of coal and combustion conditions. Its utilization helps in waste management and environmental protection by reducing the need for conventional materials and preventing landfilling.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>With reference to &#8216;fly ash&#8217; produced by the power plants using coal as fuel, which of the following statements is\/are correct? 1. Fly ash can be used in the production of bricks for building construction. 2. Fly ash can be used as a replacement for some of the Portland cement contents of concrete. 3. Fly &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"With reference to &#8216;fly ash&#8217; produced by the power plants using coal as\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-fly-ash-produced-by-the-power-plants-using-coal-as\/#more-91256\">Detailed Solution<span class=\"screen-reader-text\">With reference to &#8216;fly ash&#8217; produced by the power plants using coal as<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1092],"tags":[1443,1136,1137],"class_list":["post-91256","post","type-post","status-publish","format-standard","hentry","category-upsc-ias","tag-1443","tag-environment-and-ecology","tag-pollution","no-featured-image-padding"],"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>With reference to &#039;fly ash&#039; produced by the power plants using coal as<\/title>\n<meta name=\"description\" content=\"Statements 1 and 2 are correct regarding the uses of fly ash produced by power plants. Statement 3 is incorrect as fly ash contains more than just silicon dioxide and calcium oxide, and it can contain toxic elements. Fly ash is a valuable by-product with established applications in construction materials. It is commonly used in manufacturing bricks and as a partial replacement for Portland cement in concrete mixes, improving properties like strength and durability. 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It is commonly used in manufacturing bricks and as a partial replacement for Portland cement in concrete mixes, improving properties like strength and durability. However, fly ash contains various metal oxides and trace elements, some of which can be toxic.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-fly-ash-produced-by-the-power-plants-using-coal-as\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:51:14+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"With reference to 'fly ash' produced by the power plants using coal as","description":"Statements 1 and 2 are correct regarding the uses of fly ash produced by power plants. Statement 3 is incorrect as fly ash contains more than just silicon dioxide and calcium oxide, and it can contain toxic elements. Fly ash is a valuable by-product with established applications in construction materials. It is commonly used in manufacturing bricks and as a partial replacement for Portland cement in concrete mixes, improving properties like strength and durability. However, fly ash contains various metal oxides and trace elements, some of which can be toxic.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-fly-ash-produced-by-the-power-plants-using-coal-as\/","og_locale":"en_US","og_type":"article","og_title":"With reference to 'fly ash' produced by the power plants using coal as","og_description":"Statements 1 and 2 are correct regarding the uses of fly ash produced by power plants. Statement 3 is incorrect as fly ash contains more than just silicon dioxide and calcium oxide, and it can contain toxic elements. Fly ash is a valuable by-product with established applications in construction materials. It is commonly used in manufacturing bricks and as a partial replacement for Portland cement in concrete mixes, improving properties like strength and durability. However, fly ash contains various metal oxides and trace elements, some of which can be toxic.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-fly-ash-produced-by-the-power-plants-using-coal-as\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:51:14+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-fly-ash-produced-by-the-power-plants-using-coal-as\/","url":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-fly-ash-produced-by-the-power-plants-using-coal-as\/","name":"With reference to 'fly ash' produced by the power plants using coal as","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:51:14+00:00","dateModified":"2025-06-01T10:51:14+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Statements 1 and 2 are correct regarding the uses of fly ash produced by power plants. Statement 3 is incorrect as fly ash contains more than just silicon dioxide and calcium oxide, and it can contain toxic elements. Fly ash is a valuable by-product with established applications in construction materials. It is commonly used in manufacturing bricks and as a partial replacement for Portland cement in concrete mixes, improving properties like strength and durability. However, fly ash contains various metal oxides and trace elements, some of which can be toxic.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-fly-ash-produced-by-the-power-plants-using-coal-as\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-fly-ash-produced-by-the-power-plants-using-coal-as\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/with-reference-to-fly-ash-produced-by-the-power-plants-using-coal-as\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC IAS","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-ias\/"},{"@type":"ListItem","position":3,"name":"With reference to &#8216;fly ash&#8217; produced by the power plants using coal as"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/91256","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=91256"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/91256\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=91256"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=91256"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=91256"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}