{"id":6454,"date":"2024-04-15T02:28:56","date_gmt":"2024-04-15T02:28:56","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=6454"},"modified":"2024-04-15T02:28:56","modified_gmt":"2024-04-15T02:28:56","slug":"which-of-the-following-pairs-gives-a-correct-combination-of-the-useful-and-harmful-constituents-respectively-of-a-good-brick-earth-a-lime-stone-and-alumina-b-silica-and-alkalies-c-alumina-and-iron","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-pairs-gives-a-correct-combination-of-the-useful-and-harmful-constituents-respectively-of-a-good-brick-earth-a-lime-stone-and-alumina-b-silica-and-alkalies-c-alumina-and-iron\/","title":{"rendered":"Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth? A. Lime stone and alumina B. Silica and alkalies C. Alumina and iron D. Alkalies and magnesium"},"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_6a9e9b7b42855\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    Lime stone and alumina                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"true\">\r\n                    Silica and alkalies                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    Alumina and iron                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    Alkalies and magnesium                <\/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 B. Silica and alkalies.<\/p>\n<p>Silica is the main component of brick earth, and it is responsible for the strength of the brick. Alkalies are harmful to brick earth because they can cause the brick to break down over time.<\/p>\n<p>Lime stone is not a component of brick earth, and it is not harmful to brick earth. Alumina is a component of brick earth, but it is not as important as silica. Iron is not a component of brick earth, and it is not harmful to brick earth. Magnesium is not a component of brick earth, and it is not harmful to brick earth.<\/p>\n<p>Here is a more detailed explanation of each option:<\/p>\n<ul>\n<li>Option A: Lime stone and alumina. Lime stone is not a component of brick earth, and alumina is not as important as silica. Therefore, this option is not correct.<\/li>\n<li>Option B: Silica and alkalies. Silica is the main component of brick earth, and it is responsible for the strength of the brick. Alkalies are harmful to brick <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> earth because they can cause the brick to break down over time. Therefore, this option is correct.<\/li>\n<li>Option C: Alumina and iron. Alumina is a component of brick earth, but it is not as important as silica. Iron is not a component of brick earth. Therefore, this option is not correct.<\/li>\n<li>Option D: Alkalies and magnesium. Alkalies are harmful <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> to brick earth, and magnesium is not a component of brick earth. Therefore, this option is not correct.<\/li>\n<\/ul>\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":[644],"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>Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth? A. Lime stone and alumina B. Silica and alkalies C. Alumina and iron D. Alkalies and magnesium<\/title>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-pairs-gives-a-correct-combination-of-the-useful-and-harmful-constituents-respectively-of-a-good-brick-earth-a-lime-stone-and-alumina-b-silica-and-alkalies-c-alumina-and-iron\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth? A. Lime stone and alumina B. Silica and alkalies C. Alumina and iron D. Alkalies and magnesium\" \/>\n<meta property=\"og:description\" content=\"Join Our Telegram Channel Subscribe on YouTube\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-pairs-gives-a-correct-combination-of-the-useful-and-harmful-constituents-respectively-of-a-good-brick-earth-a-lime-stone-and-alumina-b-silica-and-alkalies-c-alumina-and-iron\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2024-04-15T02:28:56+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":"Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth? A. Lime stone and alumina B. Silica and alkalies C. Alumina and iron D. Alkalies and magnesium","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\/which-of-the-following-pairs-gives-a-correct-combination-of-the-useful-and-harmful-constituents-respectively-of-a-good-brick-earth-a-lime-stone-and-alumina-b-silica-and-alkalies-c-alumina-and-iron\/","og_locale":"en_US","og_type":"article","og_title":"Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth? A. Lime stone and alumina B. Silica and alkalies C. Alumina and iron D. Alkalies and magnesium","og_description":"Join Our Telegram Channel Subscribe on YouTube","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-pairs-gives-a-correct-combination-of-the-useful-and-harmful-constituents-respectively-of-a-good-brick-earth-a-lime-stone-and-alumina-b-silica-and-alkalies-c-alumina-and-iron\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2024-04-15T02:28:56+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\/which-of-the-following-pairs-gives-a-correct-combination-of-the-useful-and-harmful-constituents-respectively-of-a-good-brick-earth-a-lime-stone-and-alumina-b-silica-and-alkalies-c-alumina-and-iron\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-pairs-gives-a-correct-combination-of-the-useful-and-harmful-constituents-respectively-of-a-good-brick-earth-a-lime-stone-and-alumina-b-silica-and-alkalies-c-alumina-and-iron\/","name":"Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth? A. Lime stone and alumina B. Silica and alkalies C. Alumina and iron D. Alkalies and magnesium","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2024-04-15T02:28:56+00:00","dateModified":"2024-04-15T02:28:56+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-pairs-gives-a-correct-combination-of-the-useful-and-harmful-constituents-respectively-of-a-good-brick-earth-a-lime-stone-and-alumina-b-silica-and-alkalies-c-alumina-and-iron\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-pairs-gives-a-correct-combination-of-the-useful-and-harmful-constituents-respectively-of-a-good-brick-earth-a-lime-stone-and-alumina-b-silica-and-alkalies-c-alumina-and-iron\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-pairs-gives-a-correct-combination-of-the-useful-and-harmful-constituents-respectively-of-a-good-brick-earth-a-lime-stone-and-alumina-b-silica-and-alkalies-c-alumina-and-iron\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"mcq","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/"},{"@type":"ListItem","position":3,"name":"Civil engineering","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/civil-engineering\/"},{"@type":"ListItem","position":4,"name":"Building materials","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/civil-engineering\/building-materials\/"},{"@type":"ListItem","position":5,"name":"Which of the following pairs gives a correct combination of the useful and harmful constituents respectively of a good brick earth? A. Lime stone and alumina B. Silica and alkalies C. Alumina and iron D. Alkalies and magnesium"}]},{"@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\/d97f17072bfa490596c8f78363955d55?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/d97f17072bfa490596c8f78363955d55?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\/6454"}],"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=6454"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/6454\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=6454"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=6454"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=6454"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}