{"id":88935,"date":"2025-06-01T07:25:08","date_gmt":"2025-06-01T07:25:08","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88935"},"modified":"2025-06-01T07:25:08","modified_gmt":"2025-06-01T07:25:08","slug":"consider-the-following-reaction-2hgo-%e2%8e%af%e2%8e%af%e2%86%92-2hg-o%e2%82%82the-respective-sta","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-reaction-2hgo-%e2%8e%af%e2%8e%af%e2%86%92-2hg-o%e2%82%82the-respective-sta\/","title":{"rendered":"Consider the following reaction :\n2HgO \u23af\u23af\u2192 2Hg + O\u2082\nThe respective sta"},"content":{"rendered":"

Consider the following reaction :
\n2HgO \u23af\u23af\u2192 2Hg + O\u2082
\nThe respective state of HgO, Hg and O\u2082 in the above reaction is<\/p>\n

[amp_mcq option1=”Liquid, solid, gas” option2=”Solid, solid, gas” option3=”Liquid, solid, liquid” option4=”Solid, liquid, gas” correct=”option4″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-2 – 2023<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
Mercuric oxide (HgO) is a solid compound at room temperature. Mercury (Hg) is the only metal that exists as a liquid at room temperature. Oxygen (O\u2082) is a gas at room temperature. Therefore, the respective states of HgO, Hg, and O\u2082 are solid, liquid, and gas.<\/section>\n
The physical states of substances at standard temperature and pressure (or implied conditions) are important in chemical reactions. Mercury is unique among metals in being liquid at room temperature.<\/section>\n
This reaction represents the thermal decomposition of mercuric oxide. Heating HgO breaks it down into its constituent elements, mercury and oxygen. The states indicated correspond to the stable forms of these substances under normal conditions after the reaction.<\/section>\n","protected":false},"excerpt":{"rendered":"

Consider the following reaction : 2HgO \u23af\u23af\u2192 2Hg + O\u2082 The respective state of HgO, Hg and O\u2082 in the above reaction is [amp_mcq option1=”Liquid, solid, gas” option2=”Solid, solid, gas” option3=”Liquid, solid, liquid” option4=”Solid, liquid, gas” correct=”option4″] This question was previously asked in UPSC NDA-2 – 2023 Download PDFAttempt Online Mercuric oxide (HgO) is a … <\/p>\n

Detailed SolutionConsider the following reaction :
\n2HgO \u23af\u23af\u2192 2Hg + O\u2082
\nThe respective sta<\/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":[1094],"tags":[1105,1096,1155],"class_list":["post-88935","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-2","tag-1105","tag-chemistry","tag-physical-and-chemical-changes-solution","no-featured-image-padding"],"yoast_head":"\nConsider the following reaction : 2HgO \u23af\u23af\u2192 2Hg + O\u2082 The respective sta<\/title>\n<meta name=\"description\" content=\"Mercuric oxide (HgO) is a solid compound at room temperature. Mercury (Hg) is the only metal that exists as a liquid at room temperature. Oxygen (O\u2082) is a gas at room temperature. Therefore, the respective states of HgO, Hg, and O\u2082 are solid, liquid, and gas. The physical states of substances at standard temperature and pressure (or implied conditions) are important in chemical reactions. Mercury is unique among metals in being liquid at room temperature.\" \/>\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\/consider-the-following-reaction-2hgo-\u23af\u23af\u2192-2hg-o\u2082the-respective-sta\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Consider the following reaction : 2HgO \u23af\u23af\u2192 2Hg + O\u2082 The respective sta\" \/>\n<meta property=\"og:description\" content=\"Mercuric oxide (HgO) is a solid compound at room temperature. Mercury (Hg) is the only metal that exists as a liquid at room temperature. Oxygen (O\u2082) is a gas at room temperature. Therefore, the respective states of HgO, Hg, and O\u2082 are solid, liquid, and gas. The physical states of substances at standard temperature and pressure (or implied conditions) are important in chemical reactions. Mercury is unique among metals in being liquid at room temperature.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-reaction-2hgo-\u23af\u23af\u2192-2hg-o\u2082the-respective-sta\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:25:08+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":"Consider the following reaction : 2HgO \u23af\u23af\u2192 2Hg + O\u2082 The respective sta","description":"Mercuric oxide (HgO) is a solid compound at room temperature. Mercury (Hg) is the only metal that exists as a liquid at room temperature. Oxygen (O\u2082) is a gas at room temperature. Therefore, the respective states of HgO, Hg, and O\u2082 are solid, liquid, and gas. The physical states of substances at standard temperature and pressure (or implied conditions) are important in chemical reactions. Mercury is unique among metals in being liquid at room temperature.","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\/consider-the-following-reaction-2hgo-\u23af\u23af\u2192-2hg-o\u2082the-respective-sta\/","og_locale":"en_US","og_type":"article","og_title":"Consider the following reaction : 2HgO \u23af\u23af\u2192 2Hg + O\u2082 The respective sta","og_description":"Mercuric oxide (HgO) is a solid compound at room temperature. Mercury (Hg) is the only metal that exists as a liquid at room temperature. Oxygen (O\u2082) is a gas at room temperature. Therefore, the respective states of HgO, Hg, and O\u2082 are solid, liquid, and gas. The physical states of substances at standard temperature and pressure (or implied conditions) are important in chemical reactions. Mercury is unique among metals in being liquid at room temperature.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-reaction-2hgo-\u23af\u23af\u2192-2hg-o\u2082the-respective-sta\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:25:08+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\/consider-the-following-reaction-2hgo-%e2%8e%af%e2%8e%af%e2%86%92-2hg-o%e2%82%82the-respective-sta\/","url":"https:\/\/exam.pscnotes.com\/mcq\/consider-the-following-reaction-2hgo-%e2%8e%af%e2%8e%af%e2%86%92-2hg-o%e2%82%82the-respective-sta\/","name":"Consider the following reaction : 2HgO \u23af\u23af\u2192 2Hg + O\u2082 The respective sta","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:25:08+00:00","dateModified":"2025-06-01T07:25:08+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Mercuric oxide (HgO) is a solid compound at room temperature. 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