{"id":87512,"date":"2025-06-01T06:45:46","date_gmt":"2025-06-01T06:45:46","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87512"},"modified":"2025-06-01T06:45:46","modified_gmt":"2025-06-01T06:45:46","slug":"radon-is","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/radon-is\/","title":{"rendered":"Radon is"},"content":{"rendered":"

Radon is<\/p>\n

[amp_mcq option1=”an inert gas” option2=”an artificial fibre” option3=”an explosive” option4=”a metal” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2017<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe question asks for the classification of Radon.
\n<\/section>\n
\nRadon (Rn) is a chemical element with atomic number 86. It is a radioactive gas. Based on its position in the periodic table (Group 18), Radon belongs to the group of noble gases (also known as inert gases). Noble gases are characterized by their filled valence electron shells, making them very unreactive chemically.
\nLet’s evaluate the options:
\nA) an inert gas: Correct. Radon is a noble gas, which is synonymous with being an inert gas due to its very low chemical reactivity.
\nB) an artificial fibre: Incorrect. Artificial fibres are synthetic textiles (e.g., nylon, polyester).
\nC) an explosive: Incorrect. Explosives are substances that undergo rapid expansion in volume with the release of large amounts of energy (e.g., TNT, gunpowder).
\nD) a metal: Incorrect. Radon is a non-metal (specifically, a gas at standard conditions).
\n<\/section>\n
\nRadon is a decay product of radium, which is itself a decay product of uranium. It is the heaviest noble gas. All isotopes of radon are radioactive. Radon is a significant environmental hazard, as it can accumulate in buildings, particularly basements, posing a health risk (lung cancer) due to inhalation of its radioactive decay products.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Radon is [amp_mcq option1=”an inert gas” option2=”an artificial fibre” option3=”an explosive” option4=”a metal” correct=”option1″] This question was previously asked in UPSC NDA-1 – 2017 Download PDFAttempt Online The question asks for the classification of Radon. Radon (Rn) is a chemical element with atomic number 86. It is a radioactive gas. Based on its position in … <\/p>\n

Detailed SolutionRadon is<\/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":[1093],"tags":[1101,1096,1245],"class_list":["post-87512","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1101","tag-chemistry","tag-sulphur-nitrogen-halogen-inert-gases","no-featured-image-padding"],"yoast_head":"\nRadon is<\/title>\n<meta name=\"description\" content=\"The question asks for the classification of Radon. Radon (Rn) is a chemical element with atomic number 86. It is a radioactive gas. Based on its position in the periodic table (Group 18), Radon belongs to the group of noble gases (also known as inert gases). Noble gases are characterized by their filled valence electron shells, making them very unreactive chemically. Let's evaluate the options: A) an inert gas: Correct. Radon is a noble gas, which is synonymous with being an inert gas due to its very low chemical reactivity. B) an artificial fibre: Incorrect. Artificial fibres are synthetic textiles (e.g., nylon, polyester). C) an explosive: Incorrect. Explosives are substances that undergo rapid expansion in volume with the release of large amounts of energy (e.g., TNT, gunpowder). D) a metal: Incorrect. Radon is a non-metal (specifically, a gas at standard conditions).\" \/>\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\/radon-is\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Radon is\" \/>\n<meta property=\"og:description\" content=\"The question asks for the classification of Radon. Radon (Rn) is a chemical element with atomic number 86. It is a radioactive gas. Based on its position in the periodic table (Group 18), Radon belongs to the group of noble gases (also known as inert gases). Noble gases are characterized by their filled valence electron shells, making them very unreactive chemically. Let's evaluate the options: A) an inert gas: Correct. Radon is a noble gas, which is synonymous with being an inert gas due to its very low chemical reactivity. B) an artificial fibre: Incorrect. Artificial fibres are synthetic textiles (e.g., nylon, polyester). C) an explosive: Incorrect. Explosives are substances that undergo rapid expansion in volume with the release of large amounts of energy (e.g., TNT, gunpowder). D) a metal: Incorrect. Radon is a non-metal (specifically, a gas at standard conditions).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/radon-is\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:45:46+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":"Radon is","description":"The question asks for the classification of Radon. Radon (Rn) is a chemical element with atomic number 86. It is a radioactive gas. Based on its position in the periodic table (Group 18), Radon belongs to the group of noble gases (also known as inert gases). Noble gases are characterized by their filled valence electron shells, making them very unreactive chemically. Let's evaluate the options: A) an inert gas: Correct. Radon is a noble gas, which is synonymous with being an inert gas due to its very low chemical reactivity. B) an artificial fibre: Incorrect. Artificial fibres are synthetic textiles (e.g., nylon, polyester). C) an explosive: Incorrect. Explosives are substances that undergo rapid expansion in volume with the release of large amounts of energy (e.g., TNT, gunpowder). D) a metal: Incorrect. Radon is a non-metal (specifically, a gas at standard conditions).","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\/radon-is\/","og_locale":"en_US","og_type":"article","og_title":"Radon is","og_description":"The question asks for the classification of Radon. Radon (Rn) is a chemical element with atomic number 86. It is a radioactive gas. Based on its position in the periodic table (Group 18), Radon belongs to the group of noble gases (also known as inert gases). Noble gases are characterized by their filled valence electron shells, making them very unreactive chemically. Let's evaluate the options: A) an inert gas: Correct. Radon is a noble gas, which is synonymous with being an inert gas due to its very low chemical reactivity. B) an artificial fibre: Incorrect. Artificial fibres are synthetic textiles (e.g., nylon, polyester). C) an explosive: Incorrect. Explosives are substances that undergo rapid expansion in volume with the release of large amounts of energy (e.g., TNT, gunpowder). D) a metal: Incorrect. Radon is a non-metal (specifically, a gas at standard conditions).","og_url":"https:\/\/exam.pscnotes.com\/mcq\/radon-is\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:45:46+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\/radon-is\/","url":"https:\/\/exam.pscnotes.com\/mcq\/radon-is\/","name":"Radon is","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:45:46+00:00","dateModified":"2025-06-01T06:45:46+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The question asks for the classification of Radon. Radon (Rn) is a chemical element with atomic number 86. It is a radioactive gas. Based on its position in the periodic table (Group 18), Radon belongs to the group of noble gases (also known as inert gases). Noble gases are characterized by their filled valence electron shells, making them very unreactive chemically. Let's evaluate the options: A) an inert gas: Correct. Radon is a noble gas, which is synonymous with being an inert gas due to its very low chemical reactivity. B) an artificial fibre: Incorrect. Artificial fibres are synthetic textiles (e.g., nylon, polyester). C) an explosive: Incorrect. Explosives are substances that undergo rapid expansion in volume with the release of large amounts of energy (e.g., TNT, gunpowder). D) a metal: Incorrect. 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