{"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>[amp_mcq option1=&#8221;Aluminium phosphide&#8221; option2=&#8221;Hydrogen sulphide&#8221; option3=&#8221;Hydrogenated wafers&#8221; option4=&#8221;Aluminium sulphide&#8221; correct=&#8221;option2&#8243;]<!--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 surface of the brass, which discolours the brass.<\/p>\n<p>Aluminium phosphide, hydrogenated wafers, and 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>[amp_mcq option1=&#8221;Aluminium phosphide&#8221; option2=&#8221;Hydrogen sulphide&#8221; option3=&#8221;Hydrogenated wafers&#8221; option4=&#8221;Aluminium sulphide&#8221; correct=&#8221;option2&#8243;]<\/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":[],"class_list":["post-23872","post","type-post","status-publish","format-standard","hentry","category-chemistry","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>Brass gets discoloured in air due to constant exposure in presence of: A. Aluminium phosphide B. Hydrogen sulphide C. Hydrogenated wafers D. 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Aluminium sulphide","og_description":"[amp_mcq option1=&#8221;Aluminium phosphide&#8221; option2=&#8221;Hydrogen sulphide&#8221; option3=&#8221;Hydrogenated wafers&#8221; option4=&#8221;Aluminium sulphide&#8221; correct=&#8221;option2&#8243;]","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. 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