{"id":85380,"date":"2025-06-01T03:15:00","date_gmt":"2025-06-01T03:15:00","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=85380"},"modified":"2025-06-01T03:15:00","modified_gmt":"2025-06-01T03:15:00","slug":"what-is-the-chemical-composition-of-a-soda-acid-type-fire","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-chemical-composition-of-a-soda-acid-type-fire\/","title":{"rendered":"What is the chemical composition of a soda-acid type fire"},"content":{"rendered":"

What is the chemical composition of a soda-acid type fire extinguisher?<\/p>\n

[amp_mcq option1=”Solution of sodium hydrogen carbonate and sulfuric acid” option2=”Solution of sodium carbonate and sulfuric acid” option3=”Solution of carbon dioxide and sulfuric acid” option4=”Solution of sodium chloride and sulfuric acid” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-1 – 2023<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nA soda-acid fire extinguisher contains a solution of sodium hydrogen carbonate (NaHCO\u2083), also known as sodium bicarbonate or baking soda, and a separate container of sulfuric acid (H\u2082SO\u2084). When the extinguisher is activated, the acid mixes with the sodium bicarbonate solution. A chemical reaction occurs:
\n$2NaHCO_3 (aq) + H_2SO_4 (aq) \\rightarrow Na_2SO_4 (aq) + 2H_2O (l) + 2CO_2 (g)$
\nThis reaction produces a large volume of carbon dioxide gas (CO\u2082), which is expelled under pressure. The CO\u2082 gas is denser than air and blankets the fire, displacing oxygen and suppressing the combustion.
\n<\/section>\n
\n– Soda-acid fire extinguishers utilize the reaction between sodium hydrogen carbonate and sulfuric acid.
\n– The extinguishing agent is primarily carbon dioxide gas produced by the reaction.
\n<\/section>\n
\nSoda-acid extinguishers are effective on Class A fires (ordinary combustibles like wood, paper, textiles). They are not suitable for Class B (flammable liquids) or Class C (electrical) fires, and can be dangerous to use on electrical fires due to the water content. Modern fire extinguishers use different agents like foam, dry chemical powder, or CO\u2082 itself.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

What is the chemical composition of a soda-acid type fire extinguisher? [amp_mcq option1=”Solution of sodium hydrogen carbonate and sulfuric acid” option2=”Solution of sodium carbonate and sulfuric acid” option3=”Solution of carbon dioxide and sulfuric acid” option4=”Solution of sodium chloride and sulfuric acid” correct=”option1″] This question was previously asked in UPSC CDS-1 – 2023 Download PDFAttempt Online … <\/p>\n

Detailed SolutionWhat is the chemical composition of a soda-acid type fire<\/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":[1105,1202,1096],"class_list":["post-85380","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-1","tag-1105","tag-acid-base-and-salt","tag-chemistry","no-featured-image-padding"],"yoast_head":"\nWhat is the chemical composition of a soda-acid type fire<\/title>\n<meta name=\"description\" content=\"A soda-acid fire extinguisher contains a solution of sodium hydrogen carbonate (NaHCO\u2083), also known as sodium bicarbonate or baking soda, and a separate container of sulfuric acid (H\u2082SO\u2084). When the extinguisher is activated, the acid mixes with the sodium bicarbonate solution. A chemical reaction occurs: $2NaHCO_3 (aq) + H_2SO_4 (aq) rightarrow Na_2SO_4 (aq) + 2H_2O (l) + 2CO_2 (g)$ This reaction produces a large volume of carbon dioxide gas (CO\u2082), which is expelled under pressure. The CO\u2082 gas is denser than air and blankets the fire, displacing oxygen and suppressing the combustion. - Soda-acid fire extinguishers utilize the reaction between sodium hydrogen carbonate and sulfuric acid. - The extinguishing agent is primarily carbon dioxide gas produced by the reaction.\" \/>\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\/what-is-the-chemical-composition-of-a-soda-acid-type-fire\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"What is the chemical composition of a soda-acid type fire\" \/>\n<meta property=\"og:description\" content=\"A soda-acid fire extinguisher contains a solution of sodium hydrogen carbonate (NaHCO\u2083), also known as sodium bicarbonate or baking soda, and a separate container of sulfuric acid (H\u2082SO\u2084). When the extinguisher is activated, the acid mixes with the sodium bicarbonate solution. A chemical reaction occurs: $2NaHCO_3 (aq) + H_2SO_4 (aq) rightarrow Na_2SO_4 (aq) + 2H_2O (l) + 2CO_2 (g)$ This reaction produces a large volume of carbon dioxide gas (CO\u2082), which is expelled under pressure. The CO\u2082 gas is denser than air and blankets the fire, displacing oxygen and suppressing the combustion. - Soda-acid fire extinguishers utilize the reaction between sodium hydrogen carbonate and sulfuric acid. - The extinguishing agent is primarily carbon dioxide gas produced by the reaction.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-chemical-composition-of-a-soda-acid-type-fire\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T03:15:00+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":"What is the chemical composition of a soda-acid type fire","description":"A soda-acid fire extinguisher contains a solution of sodium hydrogen carbonate (NaHCO\u2083), also known as sodium bicarbonate or baking soda, and a separate container of sulfuric acid (H\u2082SO\u2084). When the extinguisher is activated, the acid mixes with the sodium bicarbonate solution. A chemical reaction occurs: $2NaHCO_3 (aq) + H_2SO_4 (aq) rightarrow Na_2SO_4 (aq) + 2H_2O (l) + 2CO_2 (g)$ This reaction produces a large volume of carbon dioxide gas (CO\u2082), which is expelled under pressure. The CO\u2082 gas is denser than air and blankets the fire, displacing oxygen and suppressing the combustion. - Soda-acid fire extinguishers utilize the reaction between sodium hydrogen carbonate and sulfuric acid. - The extinguishing agent is primarily carbon dioxide gas produced by the reaction.","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\/what-is-the-chemical-composition-of-a-soda-acid-type-fire\/","og_locale":"en_US","og_type":"article","og_title":"What is the chemical composition of a soda-acid type fire","og_description":"A soda-acid fire extinguisher contains a solution of sodium hydrogen carbonate (NaHCO\u2083), also known as sodium bicarbonate or baking soda, and a separate container of sulfuric acid (H\u2082SO\u2084). When the extinguisher is activated, the acid mixes with the sodium bicarbonate solution. A chemical reaction occurs: $2NaHCO_3 (aq) + H_2SO_4 (aq) rightarrow Na_2SO_4 (aq) + 2H_2O (l) + 2CO_2 (g)$ This reaction produces a large volume of carbon dioxide gas (CO\u2082), which is expelled under pressure. The CO\u2082 gas is denser than air and blankets the fire, displacing oxygen and suppressing the combustion. - Soda-acid fire extinguishers utilize the reaction between sodium hydrogen carbonate and sulfuric acid. - The extinguishing agent is primarily carbon dioxide gas produced by the reaction.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-chemical-composition-of-a-soda-acid-type-fire\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T03:15:00+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\/what-is-the-chemical-composition-of-a-soda-acid-type-fire\/","url":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-chemical-composition-of-a-soda-acid-type-fire\/","name":"What is the chemical composition of a soda-acid type fire","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T03:15:00+00:00","dateModified":"2025-06-01T03:15:00+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"A soda-acid fire extinguisher contains a solution of sodium hydrogen carbonate (NaHCO\u2083), also known as sodium bicarbonate or baking soda, and a separate container of sulfuric acid (H\u2082SO\u2084). 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The CO\u2082 gas is denser than air and blankets the fire, displacing oxygen and suppressing the combustion. - Soda-acid fire extinguishers utilize the reaction between sodium hydrogen carbonate and sulfuric acid. - The extinguishing agent is primarily carbon dioxide gas produced by the reaction.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-chemical-composition-of-a-soda-acid-type-fire\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/what-is-the-chemical-composition-of-a-soda-acid-type-fire\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/what-is-the-chemical-composition-of-a-soda-acid-type-fire\/#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":"What is the chemical composition of a soda-acid type fire"}]},{"@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\/85380","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=85380"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/85380\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=85380"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=85380"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=85380"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}