{"id":84907,"date":"2025-06-01T02:55:16","date_gmt":"2025-06-01T02:55:16","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=84907"},"modified":"2025-06-01T02:55:16","modified_gmt":"2025-06-01T02:55:16","slug":"in-which-of-the-following-functional-group-isomerism-is-not-possible","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/in-which-of-the-following-functional-group-isomerism-is-not-possible\/","title":{"rendered":"In which of the following, functional group isomerism is not possible?"},"content":{"rendered":"

In which of the following, functional group isomerism is not possible?<\/p>\n

[amp_mcq option1=”Alcohols” option2=”Aldehydes” option3=”Alkyl halides” option4=”Cyanides” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-1 – 2019<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct option is C.
\n<\/section>\n
\nFunctional group isomerism involves compounds with the same molecular formula but different functional groups. Alcohols and ethers are functional group isomers (e.g., ethanol and dimethyl ether). Aldehydes and ketones are functional group isomers (e.g., propanal and propanone). Cyanides and isocyanides are functional group isomers (e.g., methyl cyanide and methyl isocyanide). Simple alkyl halides (R-X) generally do not have common functional group isomers with the same molecular formula; positional isomerism (different position of X on the carbon chain) is possible, but not a different functional group itself that is isomeric to an alkyl halide.
\n<\/section>\n
\nIsomers share the same molecular formula but differ in the arrangement of atoms. Different types of isomerism include structural isomerism (chain, positional, functional group, metamerism, tautomerism) and stereoisomerism (geometric and optical). Functional group isomerism is a type of structural isomerism.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

In which of the following, functional group isomerism is not possible? [amp_mcq option1=”Alcohols” option2=”Aldehydes” option3=”Alkyl halides” option4=”Cyanides” correct=”option3″] This question was previously asked in UPSC CDS-1 – 2019 Download PDFAttempt Online The correct option is C. Functional group isomerism involves compounds with the same molecular formula but different functional groups. Alcohols and ethers are functional … <\/p>\n

Detailed SolutionIn which of the following, functional group isomerism is not possible?<\/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":[1119,1096,1272],"class_list":["post-84907","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-1","tag-1119","tag-chemistry","tag-organic-chemistry","no-featured-image-padding"],"yoast_head":"\nIn which of the following, functional group isomerism is not possible?<\/title>\n<meta name=\"description\" content=\"The correct option is C. Functional group isomerism involves compounds with the same molecular formula but different functional groups. Alcohols and ethers are functional group isomers (e.g., ethanol and dimethyl ether). Aldehydes and ketones are functional group isomers (e.g., propanal and propanone). Cyanides and isocyanides are functional group isomers (e.g., methyl cyanide and methyl isocyanide). Simple alkyl halides (R-X) generally do not have common functional group isomers with the same molecular formula; positional isomerism (different position of X on the carbon chain) is possible, but not a different functional group itself that is isomeric to an alkyl halide.\" \/>\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\/in-which-of-the-following-functional-group-isomerism-is-not-possible\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"In which of the following, functional group isomerism is not possible?\" \/>\n<meta property=\"og:description\" content=\"The correct option is C. Functional group isomerism involves compounds with the same molecular formula but different functional groups. Alcohols and ethers are functional group isomers (e.g., ethanol and dimethyl ether). Aldehydes and ketones are functional group isomers (e.g., propanal and propanone). Cyanides and isocyanides are functional group isomers (e.g., methyl cyanide and methyl isocyanide). Simple alkyl halides (R-X) generally do not have common functional group isomers with the same molecular formula; positional isomerism (different position of X on the carbon chain) is possible, but not a different functional group itself that is isomeric to an alkyl halide.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/in-which-of-the-following-functional-group-isomerism-is-not-possible\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T02:55:16+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":"In which of the following, functional group isomerism is not possible?","description":"The correct option is C. Functional group isomerism involves compounds with the same molecular formula but different functional groups. Alcohols and ethers are functional group isomers (e.g., ethanol and dimethyl ether). Aldehydes and ketones are functional group isomers (e.g., propanal and propanone). Cyanides and isocyanides are functional group isomers (e.g., methyl cyanide and methyl isocyanide). Simple alkyl halides (R-X) generally do not have common functional group isomers with the same molecular formula; positional isomerism (different position of X on the carbon chain) is possible, but not a different functional group itself that is isomeric to an alkyl halide.","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\/in-which-of-the-following-functional-group-isomerism-is-not-possible\/","og_locale":"en_US","og_type":"article","og_title":"In which of the following, functional group isomerism is not possible?","og_description":"The correct option is C. Functional group isomerism involves compounds with the same molecular formula but different functional groups. Alcohols and ethers are functional group isomers (e.g., ethanol and dimethyl ether). Aldehydes and ketones are functional group isomers (e.g., propanal and propanone). Cyanides and isocyanides are functional group isomers (e.g., methyl cyanide and methyl isocyanide). Simple alkyl halides (R-X) generally do not have common functional group isomers with the same molecular formula; positional isomerism (different position of X on the carbon chain) is possible, but not a different functional group itself that is isomeric to an alkyl halide.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/in-which-of-the-following-functional-group-isomerism-is-not-possible\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T02:55:16+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\/in-which-of-the-following-functional-group-isomerism-is-not-possible\/","url":"https:\/\/exam.pscnotes.com\/mcq\/in-which-of-the-following-functional-group-isomerism-is-not-possible\/","name":"In which of the following, functional group isomerism is not possible?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T02:55:16+00:00","dateModified":"2025-06-01T02:55:16+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct option is C. Functional group isomerism involves compounds with the same molecular formula but different functional groups. Alcohols and ethers are functional group isomers (e.g., ethanol and dimethyl ether). Aldehydes and ketones are functional group isomers (e.g., propanal and propanone). Cyanides and isocyanides are functional group isomers (e.g., methyl cyanide and methyl isocyanide). Simple alkyl halides (R-X) generally do not have common functional group isomers with the same molecular formula; positional isomerism (different position of X on the carbon chain) is possible, but not a different functional group itself that is isomeric to an alkyl halide.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/in-which-of-the-following-functional-group-isomerism-is-not-possible\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/in-which-of-the-following-functional-group-isomerism-is-not-possible\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/in-which-of-the-following-functional-group-isomerism-is-not-possible\/#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":"In which of the following, functional group isomerism is not possible?"}]},{"@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\/84907","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=84907"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/84907\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=84907"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=84907"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=84907"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}