{"id":23872,"date":"2024-04-15T06:39:21","date_gmt":"2024-04-15T06:39:21","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=23872"},"modified":"2024-04-15T06:39:21","modified_gmt":"2024-04-15T06:39:21","slug":"brass-gets-discoloured-in-air-due-to-constant-exposure-in-presence-of-a-aluminium-phosphide-b-hydrogen-sulphide-c-hydrogenated-wafers-d-aluminium-sulphide","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/brass-gets-discoloured-in-air-due-to-constant-exposure-in-presence-of-a-aluminium-phosphide-b-hydrogen-sulphide-c-hydrogenated-wafers-d-aluminium-sulphide\/","title":{"rendered":"Brass gets discoloured in air due to constant exposure in presence of: A. Aluminium phosphide B. Hydrogen sulphide C. Hydrogenated wafers D. Aluminium sulphide"},"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_6a99670428c59\">\r\n                                            <div class=\"option\" data-option-key=\"option1\" data-is-correct=\"false\">\r\n                    Aluminium phosphide                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option2\" data-is-correct=\"true\">\r\n                    Hydrogen sulphide                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option3\" data-is-correct=\"false\">\r\n                    Hydrogenated wafers                <\/div>\r\n                                            <div class=\"option\" data-option-key=\"option4\" data-is-correct=\"false\">\r\n                    Aluminium sulphide                <\/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. Hydrogen sulphide.<\/p>\n<p>Brass is an alloy of copper and zinc. When brass is exposed to hydrogen sulphide, the copper in the brass reacts with the hydrogen sulphide to form copper sulphide. Copper sulphide is a black compound that forms a layer on the <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> surface of the brass, which discolours the brass.<\/p>\n<p>Aluminium phosphide, hydrogenated wafers, and <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> aluminium sulphide are not known to cause brass to discolour.<\/p>\n<p>Aluminium phosphide is a white solid that is used as a rodenticide. It is not known to react with brass.<\/p>\n<p>Hydrogenated wafers are thin slices of semiconductor material that have been coated with a layer of hydrogen. They are used in electronic devices. Hydrogenated wafers are not known to react with brass.<\/p>\n<p>Aluminium sulphide is a white solid that is used as a flame retardant. It is not known to react with brass.<\/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>Brass gets discoloured in air due to constant exposure in presence of: A. Aluminium phosphide B. Hydrogen sulphide C. Hydrogenated wafers D. Aluminium sulphide<\/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\/brass-gets-discoloured-in-air-due-to-constant-exposure-in-presence-of-a-aluminium-phosphide-b-hydrogen-sulphide-c-hydrogenated-wafers-d-aluminium-sulphide\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Brass gets discoloured in air due to constant exposure in presence of: A. Aluminium phosphide B. Hydrogen sulphide C. Hydrogenated wafers D. Aluminium sulphide\" \/>\n<meta property=\"og:description\" content=\"Join Our Telegram Channel Subscribe on YouTube\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/brass-gets-discoloured-in-air-due-to-constant-exposure-in-presence-of-a-aluminium-phosphide-b-hydrogen-sulphide-c-hydrogenated-wafers-d-aluminium-sulphide\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2024-04-15T06:39:21+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":"Brass gets discoloured in air due to constant exposure in presence of: A. Aluminium phosphide B. Hydrogen sulphide C. Hydrogenated wafers D. Aluminium sulphide","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\/brass-gets-discoloured-in-air-due-to-constant-exposure-in-presence-of-a-aluminium-phosphide-b-hydrogen-sulphide-c-hydrogenated-wafers-d-aluminium-sulphide\/","og_locale":"en_US","og_type":"article","og_title":"Brass gets discoloured in air due to constant exposure in presence of: A. Aluminium phosphide B. Hydrogen sulphide C. Hydrogenated wafers D. Aluminium sulphide","og_description":"Join Our Telegram Channel Subscribe on YouTube","og_url":"https:\/\/exam.pscnotes.com\/mcq\/brass-gets-discoloured-in-air-due-to-constant-exposure-in-presence-of-a-aluminium-phosphide-b-hydrogen-sulphide-c-hydrogenated-wafers-d-aluminium-sulphide\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2024-04-15T06:39:21+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\/brass-gets-discoloured-in-air-due-to-constant-exposure-in-presence-of-a-aluminium-phosphide-b-hydrogen-sulphide-c-hydrogenated-wafers-d-aluminium-sulphide\/","url":"https:\/\/exam.pscnotes.com\/mcq\/brass-gets-discoloured-in-air-due-to-constant-exposure-in-presence-of-a-aluminium-phosphide-b-hydrogen-sulphide-c-hydrogenated-wafers-d-aluminium-sulphide\/","name":"Brass gets discoloured in air due to constant exposure in presence of: A. Aluminium phosphide B. Hydrogen sulphide C. Hydrogenated wafers D. Aluminium sulphide","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2024-04-15T06:39:21+00:00","dateModified":"2024-04-15T06:39:21+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/brass-gets-discoloured-in-air-due-to-constant-exposure-in-presence-of-a-aluminium-phosphide-b-hydrogen-sulphide-c-hydrogenated-wafers-d-aluminium-sulphide\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/brass-gets-discoloured-in-air-due-to-constant-exposure-in-presence-of-a-aluminium-phosphide-b-hydrogen-sulphide-c-hydrogenated-wafers-d-aluminium-sulphide\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/brass-gets-discoloured-in-air-due-to-constant-exposure-in-presence-of-a-aluminium-phosphide-b-hydrogen-sulphide-c-hydrogenated-wafers-d-aluminium-sulphide\/#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":"chemistry","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/mcq\/chemistry\/"},{"@type":"ListItem","position":4,"name":"Brass gets discoloured in air due to constant exposure in presence of: A. Aluminium phosphide B. Hydrogen sulphide C. Hydrogenated wafers D. Aluminium sulphide"}]},{"@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\/23872"}],"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=23872"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/23872\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=23872"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=23872"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=23872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}