{"id":86030,"date":"2025-06-01T03:35:06","date_gmt":"2025-06-01T03:35:06","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=86030"},"modified":"2025-06-01T03:35:06","modified_gmt":"2025-06-01T03:35:06","slug":"which-one-of-the-following-is-monatomic","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-monatomic\/","title":{"rendered":"Which one of the following is monatomic?"},"content":{"rendered":"

Which one of the following is monatomic?<\/p>\n

[amp_mcq option1=”Hydrogen” option2=”Sulphur” option3=”Phosphorus” option4=”Helium” correct=”option4″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-2 – 2019<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
A monatomic substance consists of individual atoms that are not bonded together to form molecules under standard conditions. Hydrogen exists as diatomic molecules (H2). Sulphur exists as polyatomic molecules, commonly S8 rings. Phosphorus commonly exists as P4 tetrahedra. Helium is a noble gas and exists as single atoms (He) under standard conditions, hence it is monatomic.<\/section>\n
Monatomic substances are composed of single atoms; noble gases like Helium are monatomic.<\/section>\n
All noble gases (Helium, Neon, Argon, Krypton, Xenon, Radon) are monatomic under typical conditions because they have stable electron configurations.<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following is monatomic? [amp_mcq option1=”Hydrogen” option2=”Sulphur” option3=”Phosphorus” option4=”Helium” correct=”option4″] This question was previously asked in UPSC CDS-2 – 2019 Download PDFAttempt Online A monatomic substance consists of individual atoms that are not bonded together to form molecules under standard conditions. Hydrogen exists as diatomic molecules (H2). Sulphur exists as polyatomic molecules, … <\/p>\n

Detailed SolutionWhich one of the following is monatomic?<\/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":[1088],"tags":[1119,1096,1245],"class_list":["post-86030","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-2","tag-1119","tag-chemistry","tag-sulphur-nitrogen-halogen-inert-gases","no-featured-image-padding"],"yoast_head":"\nWhich one of the following is monatomic?<\/title>\n<meta name=\"description\" content=\"A monatomic substance consists of individual atoms that are not bonded together to form molecules under standard conditions. Hydrogen exists as diatomic molecules (H2). Sulphur exists as polyatomic molecules, commonly S8 rings. Phosphorus commonly exists as P4 tetrahedra. Helium is a noble gas and exists as single atoms (He) under standard conditions, hence it is monatomic. Monatomic substances are composed of single atoms; noble gases like Helium are monatomic.\" \/>\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-one-of-the-following-is-monatomic\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following is monatomic?\" \/>\n<meta property=\"og:description\" content=\"A monatomic substance consists of individual atoms that are not bonded together to form molecules under standard conditions. Hydrogen exists as diatomic molecules (H2). Sulphur exists as polyatomic molecules, commonly S8 rings. Phosphorus commonly exists as P4 tetrahedra. Helium is a noble gas and exists as single atoms (He) under standard conditions, hence it is monatomic. Monatomic substances are composed of single atoms; noble gases like Helium are monatomic.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-monatomic\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T03:35:06+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":"Which one of the following is monatomic?","description":"A monatomic substance consists of individual atoms that are not bonded together to form molecules under standard conditions. Hydrogen exists as diatomic molecules (H2). Sulphur exists as polyatomic molecules, commonly S8 rings. Phosphorus commonly exists as P4 tetrahedra. Helium is a noble gas and exists as single atoms (He) under standard conditions, hence it is monatomic. Monatomic substances are composed of single atoms; noble gases like Helium are monatomic.","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-one-of-the-following-is-monatomic\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following is monatomic?","og_description":"A monatomic substance consists of individual atoms that are not bonded together to form molecules under standard conditions. Hydrogen exists as diatomic molecules (H2). Sulphur exists as polyatomic molecules, commonly S8 rings. Phosphorus commonly exists as P4 tetrahedra. Helium is a noble gas and exists as single atoms (He) under standard conditions, hence it is monatomic. Monatomic substances are composed of single atoms; noble gases like Helium are monatomic.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-monatomic\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T03:35:06+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\/which-one-of-the-following-is-monatomic\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-monatomic\/","name":"Which one of the following is monatomic?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T03:35:06+00:00","dateModified":"2025-06-01T03:35:06+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"A monatomic substance consists of individual atoms that are not bonded together to form molecules under standard conditions. Hydrogen exists as diatomic molecules (H2). Sulphur exists as polyatomic molecules, commonly S8 rings. Phosphorus commonly exists as P4 tetrahedra. Helium is a noble gas and exists as single atoms (He) under standard conditions, hence it is monatomic. Monatomic substances are composed of single atoms; noble gases like Helium are monatomic.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-monatomic\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-monatomic\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-monatomic\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CDS-2","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-cds-2\/"},{"@type":"ListItem","position":3,"name":"Which one of the following is monatomic?"}]},{"@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\/86030","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=86030"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/86030\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=86030"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=86030"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=86030"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}