{"id":85344,"date":"2025-06-01T03:12:45","date_gmt":"2025-06-01T03:12:45","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=85344"},"modified":"2025-06-01T03:12:45","modified_gmt":"2025-06-01T03:12:45","slug":"which-of-the-following-statements-with-regard-to-heating-of-lead-nitra","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-with-regard-to-heating-of-lead-nitra\/","title":{"rendered":"Which of the following statements with regard to heating of lead nitra"},"content":{"rendered":"<p>Which of the following statements with regard to heating of lead nitrate powder over a flame are correct?<\/p>\n<ul>\n<li>Brown fumes of NO are released.<\/li>\n<li>Colourless O\u2082 gas is released.<\/li>\n<li>It is an example of oxidation reaction.<\/li>\n<li>It is an example of thermal decomposition used for the production of NO\u2082 gas.<\/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, 3 and 4&#8243; option3=&#8221;1, 3 and 4&#8243; option4=&#8221;2 and 4 only&#8221; correct=&#8221;option2&#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 CDS-1 &#8211; 2023<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-cds-1-2023.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-cds-1-2023\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nHeating lead(II) nitrate powder is a classic example of thermal decomposition. The reaction is: 2Pb(NO\u2083)\u2082(s) \u2192 2PbO(s) + 4NO\u2082(g) + O\u2082(g).<br \/>\nStatement 1: Brown fumes of NO are released. Incorrect. The brown fumes are due to nitrogen dioxide (NO\u2082), not nitrogen monoxide (NO), which is colourless.<br \/>\nStatement 2: Colourless O\u2082 gas is released. Correct. Oxygen gas is a product of the decomposition and is colourless.<br \/>\nStatement 3: It is an example of oxidation reaction. Correct. While it&#8217;s a redox reaction involving both oxidation and reduction (Nitrogen is reduced from +5 to +4 in NO\u2082, and Oxygen is oxidized from -2 in NO\u2083\u207b to 0 in O\u2082), it is valid to say that it is *an example* of a reaction where oxidation occurs.<br \/>\nStatement 4: It is an example of thermal decomposition used for the production of NO\u2082 gas. Correct. Heating breaks down lead nitrate, and NO\u2082 is one of the products, making it a method for producing NO\u2082.<br \/>\nStatements 2, 3, and 4 are correct, while statement 1 is incorrect.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\nThermal decomposition of lead nitrate produces solid lead oxide, brown nitrogen dioxide gas, and colourless oxygen gas. It is a redox reaction.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nMetal nitrates decompose on heating, but the products vary depending on the reactivity of the metal. Nitrates of less reactive metals like lead and copper produce metal oxide, nitrogen dioxide, and oxygen. Nitrates of more reactive metals like sodium and potassium usually produce metal nitrite and oxygen.<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following statements with regard to heating of lead nitrate powder over a flame are correct? Brown fumes of NO are released. Colourless O\u2082 gas is released. It is an example of oxidation reaction. It is an example of thermal decomposition used for the production of NO\u2082 gas. Select the correct answer using &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Which of the following statements with regard to heating of lead nitra\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-with-regard-to-heating-of-lead-nitra\/#more-85344\">Detailed Solution<span class=\"screen-reader-text\">Which of the following statements with regard to heating of lead nitra<\/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":[1087],"tags":[1105,1202,1096],"class_list":["post-85344","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-1","tag-1105","tag-acid-base-and-salt","tag-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>Which of the following statements with regard to heating of lead nitra<\/title>\n<meta name=\"description\" content=\"Heating lead(II) nitrate powder is a classic example of thermal decomposition. The reaction is: 2Pb(NO\u2083)\u2082(s) \u2192 2PbO(s) + 4NO\u2082(g) + O\u2082(g). Statement 1: Brown fumes of NO are released. Incorrect. The brown fumes are due to nitrogen dioxide (NO\u2082), not nitrogen monoxide (NO), which is colourless. Statement 2: Colourless O\u2082 gas is released. Correct. Oxygen gas is a product of the decomposition and is colourless. Statement 3: It is an example of oxidation reaction. Correct. While it&#039;s a redox reaction involving both oxidation and reduction (Nitrogen is reduced from +5 to +4 in NO\u2082, and Oxygen is oxidized from -2 in NO\u2083\u207b to 0 in O\u2082), it is valid to say that it is *an example* of a reaction where oxidation occurs. Statement 4: It is an example of thermal decomposition used for the production of NO\u2082 gas. Correct. Heating breaks down lead nitrate, and NO\u2082 is one of the products, making it a method for producing NO\u2082. Statements 2, 3, and 4 are correct, while statement 1 is incorrect. Thermal decomposition of lead nitrate produces solid lead oxide, brown nitrogen dioxide gas, and colourless oxygen gas. It is a redox reaction.\" \/>\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-statements-with-regard-to-heating-of-lead-nitra\/\" \/>\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 statements with regard to heating of lead nitra\" \/>\n<meta property=\"og:description\" content=\"Heating lead(II) nitrate powder is a classic example of thermal decomposition. The reaction is: 2Pb(NO\u2083)\u2082(s) \u2192 2PbO(s) + 4NO\u2082(g) + O\u2082(g). Statement 1: Brown fumes of NO are released. Incorrect. The brown fumes are due to nitrogen dioxide (NO\u2082), not nitrogen monoxide (NO), which is colourless. Statement 2: Colourless O\u2082 gas is released. Correct. Oxygen gas is a product of the decomposition and is colourless. Statement 3: It is an example of oxidation reaction. Correct. While it&#039;s a redox reaction involving both oxidation and reduction (Nitrogen is reduced from +5 to +4 in NO\u2082, and Oxygen is oxidized from -2 in NO\u2083\u207b to 0 in O\u2082), it is valid to say that it is *an example* of a reaction where oxidation occurs. Statement 4: It is an example of thermal decomposition used for the production of NO\u2082 gas. Correct. Heating breaks down lead nitrate, and NO\u2082 is one of the products, making it a method for producing NO\u2082. Statements 2, 3, and 4 are correct, while statement 1 is incorrect. Thermal decomposition of lead nitrate produces solid lead oxide, brown nitrogen dioxide gas, and colourless oxygen gas. It is a redox reaction.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-with-regard-to-heating-of-lead-nitra\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T03:12:45+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=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which of the following statements with regard to heating of lead nitra","description":"Heating lead(II) nitrate powder is a classic example of thermal decomposition. The reaction is: 2Pb(NO\u2083)\u2082(s) \u2192 2PbO(s) + 4NO\u2082(g) + O\u2082(g). Statement 1: Brown fumes of NO are released. Incorrect. The brown fumes are due to nitrogen dioxide (NO\u2082), not nitrogen monoxide (NO), which is colourless. Statement 2: Colourless O\u2082 gas is released. Correct. Oxygen gas is a product of the decomposition and is colourless. Statement 3: It is an example of oxidation reaction. Correct. While it's a redox reaction involving both oxidation and reduction (Nitrogen is reduced from +5 to +4 in NO\u2082, and Oxygen is oxidized from -2 in NO\u2083\u207b to 0 in O\u2082), it is valid to say that it is *an example* of a reaction where oxidation occurs. Statement 4: It is an example of thermal decomposition used for the production of NO\u2082 gas. Correct. Heating breaks down lead nitrate, and NO\u2082 is one of the products, making it a method for producing NO\u2082. Statements 2, 3, and 4 are correct, while statement 1 is incorrect. Thermal decomposition of lead nitrate produces solid lead oxide, brown nitrogen dioxide gas, and colourless oxygen gas. It is a redox reaction.","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-statements-with-regard-to-heating-of-lead-nitra\/","og_locale":"en_US","og_type":"article","og_title":"Which of the following statements with regard to heating of lead nitra","og_description":"Heating lead(II) nitrate powder is a classic example of thermal decomposition. The reaction is: 2Pb(NO\u2083)\u2082(s) \u2192 2PbO(s) + 4NO\u2082(g) + O\u2082(g). Statement 1: Brown fumes of NO are released. Incorrect. The brown fumes are due to nitrogen dioxide (NO\u2082), not nitrogen monoxide (NO), which is colourless. Statement 2: Colourless O\u2082 gas is released. Correct. Oxygen gas is a product of the decomposition and is colourless. Statement 3: It is an example of oxidation reaction. Correct. While it's a redox reaction involving both oxidation and reduction (Nitrogen is reduced from +5 to +4 in NO\u2082, and Oxygen is oxidized from -2 in NO\u2083\u207b to 0 in O\u2082), it is valid to say that it is *an example* of a reaction where oxidation occurs. Statement 4: It is an example of thermal decomposition used for the production of NO\u2082 gas. Correct. Heating breaks down lead nitrate, and NO\u2082 is one of the products, making it a method for producing NO\u2082. Statements 2, 3, and 4 are correct, while statement 1 is incorrect. Thermal decomposition of lead nitrate produces solid lead oxide, brown nitrogen dioxide gas, and colourless oxygen gas. It is a redox reaction.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-with-regard-to-heating-of-lead-nitra\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T03:12:45+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-with-regard-to-heating-of-lead-nitra\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-with-regard-to-heating-of-lead-nitra\/","name":"Which of the following statements with regard to heating of lead nitra","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T03:12:45+00:00","dateModified":"2025-06-01T03:12:45+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Heating lead(II) nitrate powder is a classic example of thermal decomposition. The reaction is: 2Pb(NO\u2083)\u2082(s) \u2192 2PbO(s) + 4NO\u2082(g) + O\u2082(g). Statement 1: Brown fumes of NO are released. Incorrect. The brown fumes are due to nitrogen dioxide (NO\u2082), not nitrogen monoxide (NO), which is colourless. Statement 2: Colourless O\u2082 gas is released. Correct. Oxygen gas is a product of the decomposition and is colourless. Statement 3: It is an example of oxidation reaction. Correct. While it's a redox reaction involving both oxidation and reduction (Nitrogen is reduced from +5 to +4 in NO\u2082, and Oxygen is oxidized from -2 in NO\u2083\u207b to 0 in O\u2082), it is valid to say that it is *an example* of a reaction where oxidation occurs. Statement 4: It is an example of thermal decomposition used for the production of NO\u2082 gas. Correct. Heating breaks down lead nitrate, and NO\u2082 is one of the products, making it a method for producing NO\u2082. Statements 2, 3, and 4 are correct, while statement 1 is incorrect. Thermal decomposition of lead nitrate produces solid lead oxide, brown nitrogen dioxide gas, and colourless oxygen gas. It is a redox reaction.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-with-regard-to-heating-of-lead-nitra\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-with-regard-to-heating-of-lead-nitra\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-with-regard-to-heating-of-lead-nitra\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CDS-1","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-cds-1\/"},{"@type":"ListItem","position":3,"name":"Which of the following statements with regard to heating of lead nitra"}]},{"@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\/85344","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=85344"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/85344\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=85344"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=85344"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=85344"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}