{"id":89943,"date":"2025-06-01T10:17:40","date_gmt":"2025-06-01T10:17:40","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89943"},"modified":"2025-06-01T10:17:40","modified_gmt":"2025-06-01T10:17:40","slug":"the-hydrogen-atoms-present-in-acetylene-molecule-are","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-hydrogen-atoms-present-in-acetylene-molecule-are\/","title":{"rendered":"The hydrogen atoms present in acetylene molecule are :"},"content":{"rendered":"

The hydrogen atoms present in acetylene molecule are :<\/p>\n

[amp_mcq option1=”acidic” option2=”basic” option3=”both acidic and basic” option4=”neutral” correct=”option1″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC CAPF – 2015<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
Acetylene has the chemical formula C\u2082H\u2082 and a linear structure H-C\u2261C-H. The carbon atoms in acetylene are sp hybridized. sp hybridized orbitals have higher s-character (50%) compared to sp\u00b2 (33.3%) or sp\u00b3 (25%) hybridized orbitals. Higher s-character means the electrons in the C-H bond are held more closely to the carbon nucleus due to the greater penetration of the s orbital. This makes the carbon atom more electronegative than sp\u00b2 or sp\u00b3 hybridized carbons, and consequently, it pulls electron density away from the hydrogen atom. This makes the C-H bond weaker and the hydrogen slightly positive, allowing it to be removed as a proton (H\u207a) by a strong base. Therefore, the hydrogen atoms in acetylene are acidic.
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The acidity of terminal alkynes (like acetylene) is due to the high electronegativity of the sp-hybridized carbon atom to which the hydrogen is attached. This polarizes the C-H bond, making the proton relatively easy to remove.
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Acetylene is a weak acid, much weaker than carboxylic acids or mineral acids, but significantly more acidic than alkanes or alkenes. It can react with very strong bases, such as sodium amide (NaNH\u2082), to form acetylide salts (e.g., Na\u207a [C\u2261CH]\u207b or Na\u207a [C\u2261C]\u207b Na\u207a). This acidic property is utilized in certain organic synthesis reactions.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

The hydrogen atoms present in acetylene molecule are : [amp_mcq option1=”acidic” option2=”basic” option3=”both acidic and basic” option4=”neutral” correct=”option1″] This question was previously asked in UPSC CAPF – 2015 Download PDFAttempt Online Acetylene has the chemical formula C\u2082H\u2082 and a linear structure H-C\u2261C-H. The carbon atoms in acetylene are sp hybridized. sp hybridized orbitals have higher … <\/p>\n

Detailed SolutionThe hydrogen atoms present in acetylene molecule are :<\/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":[1085],"tags":[1443,1096,1330],"class_list":["post-89943","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1443","tag-chemistry","tag-hydrocarbons","no-featured-image-padding"],"yoast_head":"\nThe hydrogen atoms present in acetylene molecule are :<\/title>\n<meta name=\"description\" content=\"Acetylene has the chemical formula C\u2082H\u2082 and a linear structure H-C\u2261C-H. The carbon atoms in acetylene are sp hybridized. sp hybridized orbitals have higher s-character (50%) compared to sp\u00b2 (33.3%) or sp\u00b3 (25%) hybridized orbitals. Higher s-character means the electrons in the C-H bond are held more closely to the carbon nucleus due to the greater penetration of the s orbital. This makes the carbon atom more electronegative than sp\u00b2 or sp\u00b3 hybridized carbons, and consequently, it pulls electron density away from the hydrogen atom. This makes the C-H bond weaker and the hydrogen slightly positive, allowing it to be removed as a proton (H\u207a) by a strong base. Therefore, the hydrogen atoms in acetylene are acidic. The acidity of terminal alkynes (like acetylene) is due to the high electronegativity of the sp-hybridized carbon atom to which the hydrogen is attached. This polarizes the C-H bond, making the proton relatively easy to remove.\" \/>\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\/the-hydrogen-atoms-present-in-acetylene-molecule-are\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The hydrogen atoms present in acetylene molecule are :\" \/>\n<meta property=\"og:description\" content=\"Acetylene has the chemical formula C\u2082H\u2082 and a linear structure H-C\u2261C-H. The carbon atoms in acetylene are sp hybridized. sp hybridized orbitals have higher s-character (50%) compared to sp\u00b2 (33.3%) or sp\u00b3 (25%) hybridized orbitals. Higher s-character means the electrons in the C-H bond are held more closely to the carbon nucleus due to the greater penetration of the s orbital. This makes the carbon atom more electronegative than sp\u00b2 or sp\u00b3 hybridized carbons, and consequently, it pulls electron density away from the hydrogen atom. This makes the C-H bond weaker and the hydrogen slightly positive, allowing it to be removed as a proton (H\u207a) by a strong base. Therefore, the hydrogen atoms in acetylene are acidic. The acidity of terminal alkynes (like acetylene) is due to the high electronegativity of the sp-hybridized carbon atom to which the hydrogen is attached. This polarizes the C-H bond, making the proton relatively easy to remove.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/the-hydrogen-atoms-present-in-acetylene-molecule-are\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:17:40+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":"The hydrogen atoms present in acetylene molecule are :","description":"Acetylene has the chemical formula C\u2082H\u2082 and a linear structure H-C\u2261C-H. The carbon atoms in acetylene are sp hybridized. sp hybridized orbitals have higher s-character (50%) compared to sp\u00b2 (33.3%) or sp\u00b3 (25%) hybridized orbitals. Higher s-character means the electrons in the C-H bond are held more closely to the carbon nucleus due to the greater penetration of the s orbital. This makes the carbon atom more electronegative than sp\u00b2 or sp\u00b3 hybridized carbons, and consequently, it pulls electron density away from the hydrogen atom. This makes the C-H bond weaker and the hydrogen slightly positive, allowing it to be removed as a proton (H\u207a) by a strong base. Therefore, the hydrogen atoms in acetylene are acidic. The acidity of terminal alkynes (like acetylene) is due to the high electronegativity of the sp-hybridized carbon atom to which the hydrogen is attached. 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This makes the carbon atom more electronegative than sp\u00b2 or sp\u00b3 hybridized carbons, and consequently, it pulls electron density away from the hydrogen atom. This makes the C-H bond weaker and the hydrogen slightly positive, allowing it to be removed as a proton (H\u207a) by a strong base. Therefore, the hydrogen atoms in acetylene are acidic. The acidity of terminal alkynes (like acetylene) is due to the high electronegativity of the sp-hybridized carbon atom to which the hydrogen is attached. This polarizes the C-H bond, making the proton relatively easy to remove.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/the-hydrogen-atoms-present-in-acetylene-molecule-are\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:17:40+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\/the-hydrogen-atoms-present-in-acetylene-molecule-are\/","url":"https:\/\/exam.pscnotes.com\/mcq\/the-hydrogen-atoms-present-in-acetylene-molecule-are\/","name":"The hydrogen atoms present in acetylene molecule are :","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:17:40+00:00","dateModified":"2025-06-01T10:17:40+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Acetylene has the chemical formula C\u2082H\u2082 and a linear structure H-C\u2261C-H. 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