{"id":90343,"date":"2025-06-01T10:26:43","date_gmt":"2025-06-01T10:26:43","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90343"},"modified":"2025-06-01T10:26:43","modified_gmt":"2025-06-01T10:26:43","slug":"the-soda-acid-fire-extinguisher-contains","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/the-soda-acid-fire-extinguisher-contains\/","title":{"rendered":"The Soda-acid fire extinguisher contains"},"content":{"rendered":"

The Soda-acid fire extinguisher contains<\/p>\n

[amp_mcq option1=”sulphuric acid and solution of sodium hydrogencarbonate” option2=”nitric acid and solution of sodium hydrogencarbonate” option3=”sulphuric acid and solution of sodium carbonate” option4=”sulphuric acid and solution of potassium carbonate” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2019<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct option is A.
\n<\/section>\n
\nA soda-acid fire extinguisher operates based on the chemical reaction between an acid and a carbonate or bicarbonate to produce carbon dioxide gas. The standard composition of a soda-acid fire extinguisher involves sulphuric acid (H\u2082SO\u2084) and a solution of sodium hydrogencarbonate (sodium bicarbonate, NaHCO\u2083). When the extinguisher is activated (typically by inverting it or breaking a capsule), the acid mixes with the bicarbonate solution, leading to the reaction: H\u2082SO\u2084 + 2NaHCO\u2083 \u2192 Na\u2082SO\u2084 + 2H\u2082O + 2CO\u2082. The released CO\u2082 gas builds pressure, expelling the solution and also acts as a smothering agent to cut off oxygen supply to the fire.
\n<\/section>\n
\nSoda-acid fire extinguishers are effective against Class A fires (combustible materials like wood, paper, textiles) but are not suitable for Class B (flammable liquids), Class C (flammable gases), or Class D (metals) fires, especially not for electrical fires due to the water content. Modern fire extinguishers often use different agents like dry chemical powders, foam, or CO\u2082 directly.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

The Soda-acid fire extinguisher contains [amp_mcq option1=”sulphuric acid and solution of sodium hydrogencarbonate” option2=”nitric acid and solution of sodium hydrogencarbonate” option3=”sulphuric acid and solution of sodium carbonate” option4=”sulphuric acid and solution of potassium carbonate” correct=”option1″] This question was previously asked in UPSC CAPF – 2019 Download PDFAttempt Online The correct option is A. A soda-acid … <\/p>\n

Detailed SolutionThe Soda-acid fire extinguisher contains<\/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":[1119,1202,1096],"class_list":["post-90343","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1119","tag-acid-base-and-salt","tag-chemistry","no-featured-image-padding"],"yoast_head":"\nThe Soda-acid fire extinguisher contains<\/title>\n<meta name=\"description\" content=\"The correct option is A. A soda-acid fire extinguisher operates based on the chemical reaction between an acid and a carbonate or bicarbonate to produce carbon dioxide gas. The standard composition of a soda-acid fire extinguisher involves sulphuric acid (H\u2082SO\u2084) and a solution of sodium hydrogencarbonate (sodium bicarbonate, NaHCO\u2083). When the extinguisher is activated (typically by inverting it or breaking a capsule), the acid mixes with the bicarbonate solution, leading to the reaction: H\u2082SO\u2084 + 2NaHCO\u2083 \u2192 Na\u2082SO\u2084 + 2H\u2082O + 2CO\u2082. The released CO\u2082 gas builds pressure, expelling the solution and also acts as a smothering agent to cut off oxygen supply to the fire.\" \/>\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-soda-acid-fire-extinguisher-contains\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"The Soda-acid fire extinguisher contains\" \/>\n<meta property=\"og:description\" content=\"The correct option is A. A soda-acid fire extinguisher operates based on the chemical reaction between an acid and a carbonate or bicarbonate to produce carbon dioxide gas. The standard composition of a soda-acid fire extinguisher involves sulphuric acid (H\u2082SO\u2084) and a solution of sodium hydrogencarbonate (sodium bicarbonate, NaHCO\u2083). When the extinguisher is activated (typically by inverting it or breaking a capsule), the acid mixes with the bicarbonate solution, leading to the reaction: H\u2082SO\u2084 + 2NaHCO\u2083 \u2192 Na\u2082SO\u2084 + 2H\u2082O + 2CO\u2082. The released CO\u2082 gas builds pressure, expelling the solution and also acts as a smothering agent to cut off oxygen supply to the fire.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/the-soda-acid-fire-extinguisher-contains\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:26:43+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 Soda-acid fire extinguisher contains","description":"The correct option is A. A soda-acid fire extinguisher operates based on the chemical reaction between an acid and a carbonate or bicarbonate to produce carbon dioxide gas. The standard composition of a soda-acid fire extinguisher involves sulphuric acid (H\u2082SO\u2084) and a solution of sodium hydrogencarbonate (sodium bicarbonate, NaHCO\u2083). When the extinguisher is activated (typically by inverting it or breaking a capsule), the acid mixes with the bicarbonate solution, leading to the reaction: H\u2082SO\u2084 + 2NaHCO\u2083 \u2192 Na\u2082SO\u2084 + 2H\u2082O + 2CO\u2082. The released CO\u2082 gas builds pressure, expelling the solution and also acts as a smothering agent to cut off oxygen supply to the fire.","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\/the-soda-acid-fire-extinguisher-contains\/","og_locale":"en_US","og_type":"article","og_title":"The Soda-acid fire extinguisher contains","og_description":"The correct option is A. A soda-acid fire extinguisher operates based on the chemical reaction between an acid and a carbonate or bicarbonate to produce carbon dioxide gas. The standard composition of a soda-acid fire extinguisher involves sulphuric acid (H\u2082SO\u2084) and a solution of sodium hydrogencarbonate (sodium bicarbonate, NaHCO\u2083). When the extinguisher is activated (typically by inverting it or breaking a capsule), the acid mixes with the bicarbonate solution, leading to the reaction: H\u2082SO\u2084 + 2NaHCO\u2083 \u2192 Na\u2082SO\u2084 + 2H\u2082O + 2CO\u2082. The released CO\u2082 gas builds pressure, expelling the solution and also acts as a smothering agent to cut off oxygen supply to the fire.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/the-soda-acid-fire-extinguisher-contains\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:26:43+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-soda-acid-fire-extinguisher-contains\/","url":"https:\/\/exam.pscnotes.com\/mcq\/the-soda-acid-fire-extinguisher-contains\/","name":"The Soda-acid fire extinguisher contains","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:26:43+00:00","dateModified":"2025-06-01T10:26:43+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct option is A. A soda-acid fire extinguisher operates based on the chemical reaction between an acid and a carbonate or bicarbonate to produce carbon dioxide gas. The standard composition of a soda-acid fire extinguisher involves sulphuric acid (H\u2082SO\u2084) and a solution of sodium hydrogencarbonate (sodium bicarbonate, NaHCO\u2083). When the extinguisher is activated (typically by inverting it or breaking a capsule), the acid mixes with the bicarbonate solution, leading to the reaction: H\u2082SO\u2084 + 2NaHCO\u2083 \u2192 Na\u2082SO\u2084 + 2H\u2082O + 2CO\u2082. 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