{"id":87953,"date":"2025-06-01T06:58:28","date_gmt":"2025-06-01T06:58:28","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87953"},"modified":"2025-06-01T06:58:28","modified_gmt":"2025-06-01T06:58:28","slug":"which-of-the-hydrocarbons-are-arranged-as-per-the-increasing-order-of","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-hydrocarbons-are-arranged-as-per-the-increasing-order-of\/","title":{"rendered":"Which of the hydrocarbons are arranged as per the increasing order of"},"content":{"rendered":"

Which of the hydrocarbons are arranged as per the increasing order of their boiling points ?<\/p>\n

[amp_mcq option1=”Methane, Butane, Propane, Heptane” option2=”Propane, Butane, Pentane, Octane” option3=”Propane, Butane, Heptane, Methane” option4=”Octane, Ethane, Methane, Propane” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2023<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is B) Propane, Butane, Pentane, Octane.
\n<\/section>\n
\nFor a homologous series of hydrocarbons like alkanes, the boiling point generally increases with increasing molecular weight, which corresponds to an increasing number of carbon atoms. This is because larger molecules have stronger van der Waals forces (London dispersion forces), requiring more energy (higher temperature) to overcome them and transition from liquid to gas phase.
\n<\/section>\n
\nThe number of carbon atoms in the given hydrocarbons are: Methane (C1), Ethane (C2), Propane (C3), Butane (C4), Pentane (C5), Heptane (C7), Octane (C8). Arranging them by increasing carbon number gives the expected order of increasing boiling points: C1 < C2 < C3 < C4 < C5 < C6 < C7 < C8. Option B lists hydrocarbons in the order: Propane (C3), Butane (C4), Pentane (C5), Octane (C8), which corresponds to increasing carbon numbers (3 < 4 < 5 < 8), and thus increasing boiling points.\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which of the hydrocarbons are arranged as per the increasing order of their boiling points ? [amp_mcq option1=”Methane, Butane, Propane, Heptane” option2=”Propane, Butane, Pentane, Octane” option3=”Propane, Butane, Heptane, Methane” option4=”Octane, Ethane, Methane, Propane” correct=”option2″] This question was previously asked in UPSC NDA-1 – 2023 Download PDFAttempt Online The correct answer is B) Propane, Butane, Pentane, … <\/p>\n

Detailed SolutionWhich of the hydrocarbons are arranged as per the increasing order of<\/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":[1105,1096,1330],"class_list":["post-87953","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1105","tag-chemistry","tag-hydrocarbons","no-featured-image-padding"],"yoast_head":"\nWhich of the hydrocarbons are arranged as per the increasing order of<\/title>\n<meta name=\"description\" content=\"The correct answer is B) Propane, Butane, Pentane, Octane. For a homologous series of hydrocarbons like alkanes, the boiling point generally increases with increasing molecular weight, which corresponds to an increasing number of carbon atoms. This is because larger molecules have stronger van der Waals forces (London dispersion forces), requiring more energy (higher temperature) to overcome them and transition from liquid to gas phase.\" \/>\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-hydrocarbons-are-arranged-as-per-the-increasing-order-of\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which of the hydrocarbons are arranged as per the increasing order of\" \/>\n<meta property=\"og:description\" content=\"The correct answer is B) Propane, Butane, Pentane, Octane. For a homologous series of hydrocarbons like alkanes, the boiling point generally increases with increasing molecular weight, which corresponds to an increasing number of carbon atoms. This is because larger molecules have stronger van der Waals forces (London dispersion forces), requiring more energy (higher temperature) to overcome them and transition from liquid to gas phase.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-hydrocarbons-are-arranged-as-per-the-increasing-order-of\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:58:28+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 of the hydrocarbons are arranged as per the increasing order of","description":"The correct answer is B) Propane, Butane, Pentane, Octane. 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