{"id":92363,"date":"2025-06-01T11:22:11","date_gmt":"2025-06-01T11:22:11","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=92363"},"modified":"2025-06-01T11:22:11","modified_gmt":"2025-06-01T11:22:11","slug":"which-one-of-the-following-statements-about-air-is-correct","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-air-is-correct\/","title":{"rendered":"Which one of the following statements about air is correct ?"},"content":{"rendered":"

Which one of the following statements about air is correct ?<\/p>\n

[amp_mcq option1=”Air is a compound.” option2=”Air is a mixture.” option3=”Air is an element.” option4=”Air always has more oxygen than nitrogen.” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CISF-AC-EXE – 2017<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is Air is a mixture.
\n<\/section>\n
\nAir is composed of various gases such as nitrogen, oxygen, argon, carbon dioxide, and trace amounts of other gases, along with water vapour and particulate matter. These components are not chemically combined in fixed proportions but are simply mixed together. The composition of air can vary depending on factors like location and altitude. This characteristic defines it as a mixture.
\n<\/section>\n
\nA compound is formed when two or more elements are chemically bonded in a fixed ratio (e.g., water H\u2082O). An element is a pure substance consisting only of atoms that all have the same numbers of protons (e.g., Oxygen O\u2082). Air is primarily about 78% nitrogen and 21% oxygen by volume, so nitrogen is present in a greater proportion than oxygen under normal conditions.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements about air is correct ? [amp_mcq option1=”Air is a compound.” option2=”Air is a mixture.” option3=”Air is an element.” option4=”Air always has more oxygen than nitrogen.” correct=”option2″] This question was previously asked in UPSC CISF-AC-EXE – 2017 Download PDFAttempt Online The correct answer is Air is a mixture. Air is … <\/p>\n

Detailed SolutionWhich one of the following statements about air is correct ?<\/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":[1089],"tags":[1101,1096,1155],"class_list":["post-92363","post","type-post","status-publish","format-standard","hentry","category-upsc-cisf-ac-exe","tag-1101","tag-chemistry","tag-physical-and-chemical-changes-solution","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements about air is correct ?<\/title>\n<meta name=\"description\" content=\"The correct answer is Air is a mixture. Air is composed of various gases such as nitrogen, oxygen, argon, carbon dioxide, and trace amounts of other gases, along with water vapour and particulate matter. These components are not chemically combined in fixed proportions but are simply mixed together. The composition of air can vary depending on factors like location and altitude. This characteristic defines it as a mixture.\" \/>\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-statements-about-air-is-correct\/\" \/>\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 statements about air is correct ?\" \/>\n<meta property=\"og:description\" content=\"The correct answer is Air is a mixture. Air is composed of various gases such as nitrogen, oxygen, argon, carbon dioxide, and trace amounts of other gases, along with water vapour and particulate matter. These components are not chemically combined in fixed proportions but are simply mixed together. The composition of air can vary depending on factors like location and altitude. This characteristic defines it as a mixture.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-air-is-correct\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T11:22:11+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 statements about air is correct ?","description":"The correct answer is Air is a mixture. Air is composed of various gases such as nitrogen, oxygen, argon, carbon dioxide, and trace amounts of other gases, along with water vapour and particulate matter. These components are not chemically combined in fixed proportions but are simply mixed together. The composition of air can vary depending on factors like location and altitude. This characteristic defines it as a mixture.","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-statements-about-air-is-correct\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following statements about air is correct ?","og_description":"The correct answer is Air is a mixture. Air is composed of various gases such as nitrogen, oxygen, argon, carbon dioxide, and trace amounts of other gases, along with water vapour and particulate matter. These components are not chemically combined in fixed proportions but are simply mixed together. The composition of air can vary depending on factors like location and altitude. This characteristic defines it as a mixture.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-air-is-correct\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T11:22:11+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-statements-about-air-is-correct\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-air-is-correct\/","name":"Which one of the following statements about air is correct ?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T11:22:11+00:00","dateModified":"2025-06-01T11:22:11+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is Air is a mixture. Air is composed of various gases such as nitrogen, oxygen, argon, carbon dioxide, and trace amounts of other gases, along with water vapour and particulate matter. These components are not chemically combined in fixed proportions but are simply mixed together. The composition of air can vary depending on factors like location and altitude. This characteristic defines it as a mixture.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-air-is-correct\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-air-is-correct\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-about-air-is-correct\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CISF-AC-EXE","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-cisf-ac-exe\/"},{"@type":"ListItem","position":3,"name":"Which one of the following statements about air is correct ?"}]},{"@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\/92363","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=92363"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/92363\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=92363"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=92363"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=92363"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}