{"id":89821,"date":"2025-06-01T10:14:17","date_gmt":"2025-06-01T10:14:17","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89821"},"modified":"2025-06-01T10:14:17","modified_gmt":"2025-06-01T10:14:17","slug":"arrange-the-following-fuels-in-the-decreasing-order-of-air-pollution-c","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/arrange-the-following-fuels-in-the-decreasing-order-of-air-pollution-c\/","title":{"rendered":"Arrange the following fuels in the decreasing order of air pollution c"},"content":{"rendered":"

Arrange the following fuels in the decreasing order of air pollution caused by burning a kilogram of each of them :<\/p>\n

[amp_mcq option1=”CNG, Petrol, Diesel” option2=”Diesel, Petrol, CNG” option3=”Petrol, Diesel, CNG” option4=”Diesel, CNG, Petrol” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2014<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe question asks to arrange fuels in decreasing order of air pollution caused by burning a kilogram of each. Generally, different fuels produce varying amounts of pollutants like particulate matter (PM), nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons, and sulfur oxides (SOx).
\n– Diesel: Diesel fuel is heavier than petrol and its combustion typically produces more particulate matter and higher levels of NOx, especially from older engines or those without modern emission controls. It can also contain more sulfur, leading to SOx emissions.
\n– Petrol (Gasoline): Petrol combustion produces significant amounts of CO, NOx, and unburnt hydrocarbons. While generally producing less PM than diesel, its emissions of other pollutants can be substantial.
\n– CNG (Compressed Natural Gas): CNG is primarily methane (CH4). Burning CNG is considered much cleaner than burning petrol or diesel. It produces significantly lower levels of PM, CO, NOx, and hydrocarbons. It contains virtually no sulfur, so no SOx emissions.
\nRanking from most polluting to least polluting per kilogram burned (considering typical emissions profiles): Diesel > Petrol > CNG.
\nTherefore, the decreasing order of air pollution caused is Diesel, Petrol, CNG.
\n<\/section>\n
\nUnderstand the relative environmental impact and pollution characteristics of common fuels like Diesel, Petrol, and CNG. CNG is generally considered the cleanest of the three in terms of air pollutant emissions.
\n<\/section>\n
\nThe specific emissions profile can vary depending on engine technology, fuel quality, and emission control systems (like catalytic converters). However, the general ranking of CNG being cleaner than petrol, which is cleaner than diesel (especially regarding PM) is widely accepted in the context of conventional engines.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Arrange the following fuels in the decreasing order of air pollution caused by burning a kilogram of each of them : [amp_mcq option1=”CNG, Petrol, Diesel” option2=”Diesel, Petrol, CNG” option3=”Petrol, Diesel, CNG” option4=”Diesel, CNG, Petrol” correct=”option2″] This question was previously asked in UPSC CAPF – 2014 Download PDFAttempt Online The question asks to arrange fuels in … <\/p>\n

Detailed SolutionArrange the following fuels in the decreasing order of air pollution c<\/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":[1468,1136,1137],"class_list":["post-89821","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1468","tag-environment-and-ecology","tag-pollution","no-featured-image-padding"],"yoast_head":"\nArrange the following fuels in the decreasing order of air pollution c<\/title>\n<meta name=\"description\" content=\"The question asks to arrange fuels in decreasing order of air pollution caused by burning a kilogram of each. Generally, different fuels produce varying amounts of pollutants like particulate matter (PM), nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons, and sulfur oxides (SOx). - Diesel: Diesel fuel is heavier than petrol and its combustion typically produces more particulate matter and higher levels of NOx, especially from older engines or those without modern emission controls. It can also contain more sulfur, leading to SOx emissions. - Petrol (Gasoline): Petrol combustion produces significant amounts of CO, NOx, and unburnt hydrocarbons. While generally producing less PM than diesel, its emissions of other pollutants can be substantial. - CNG (Compressed Natural Gas): CNG is primarily methane (CH4). Burning CNG is considered much cleaner than burning petrol or diesel. It produces significantly lower levels of PM, CO, NOx, and hydrocarbons. It contains virtually no sulfur, so no SOx emissions. Ranking from most polluting to least polluting per kilogram burned (considering typical emissions profiles): Diesel > Petrol > CNG. Therefore, the decreasing order of air pollution caused is Diesel, Petrol, CNG. Understand the relative environmental impact and pollution characteristics of common fuels like Diesel, Petrol, and CNG. CNG is generally considered the cleanest of the three in terms of air pollutant emissions.\" \/>\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\/arrange-the-following-fuels-in-the-decreasing-order-of-air-pollution-c\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Arrange the following fuels in the decreasing order of air pollution c\" \/>\n<meta property=\"og:description\" content=\"The question asks to arrange fuels in decreasing order of air pollution caused by burning a kilogram of each. Generally, different fuels produce varying amounts of pollutants like particulate matter (PM), nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons, and sulfur oxides (SOx). - Diesel: Diesel fuel is heavier than petrol and its combustion typically produces more particulate matter and higher levels of NOx, especially from older engines or those without modern emission controls. It can also contain more sulfur, leading to SOx emissions. - Petrol (Gasoline): Petrol combustion produces significant amounts of CO, NOx, and unburnt hydrocarbons. While generally producing less PM than diesel, its emissions of other pollutants can be substantial. - CNG (Compressed Natural Gas): CNG is primarily methane (CH4). Burning CNG is considered much cleaner than burning petrol or diesel. It produces significantly lower levels of PM, CO, NOx, and hydrocarbons. It contains virtually no sulfur, so no SOx emissions. Ranking from most polluting to least polluting per kilogram burned (considering typical emissions profiles): Diesel > Petrol > CNG. Therefore, the decreasing order of air pollution caused is Diesel, Petrol, CNG. Understand the relative environmental impact and pollution characteristics of common fuels like Diesel, Petrol, and CNG. CNG is generally considered the cleanest of the three in terms of air pollutant emissions.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/arrange-the-following-fuels-in-the-decreasing-order-of-air-pollution-c\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:14:17+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=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Arrange the following fuels in the decreasing order of air pollution c","description":"The question asks to arrange fuels in decreasing order of air pollution caused by burning a kilogram of each. Generally, different fuels produce varying amounts of pollutants like particulate matter (PM), nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons, and sulfur oxides (SOx). - Diesel: Diesel fuel is heavier than petrol and its combustion typically produces more particulate matter and higher levels of NOx, especially from older engines or those without modern emission controls. It can also contain more sulfur, leading to SOx emissions. - Petrol (Gasoline): Petrol combustion produces significant amounts of CO, NOx, and unburnt hydrocarbons. While generally producing less PM than diesel, its emissions of other pollutants can be substantial. - CNG (Compressed Natural Gas): CNG is primarily methane (CH4). Burning CNG is considered much cleaner than burning petrol or diesel. It produces significantly lower levels of PM, CO, NOx, and hydrocarbons. It contains virtually no sulfur, so no SOx emissions. Ranking from most polluting to least polluting per kilogram burned (considering typical emissions profiles): Diesel > Petrol > CNG. Therefore, the decreasing order of air pollution caused is Diesel, Petrol, CNG. Understand the relative environmental impact and pollution characteristics of common fuels like Diesel, Petrol, and CNG. CNG is generally considered the cleanest of the three in terms of air pollutant emissions.","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\/arrange-the-following-fuels-in-the-decreasing-order-of-air-pollution-c\/","og_locale":"en_US","og_type":"article","og_title":"Arrange the following fuels in the decreasing order of air pollution c","og_description":"The question asks to arrange fuels in decreasing order of air pollution caused by burning a kilogram of each. Generally, different fuels produce varying amounts of pollutants like particulate matter (PM), nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons, and sulfur oxides (SOx). - Diesel: Diesel fuel is heavier than petrol and its combustion typically produces more particulate matter and higher levels of NOx, especially from older engines or those without modern emission controls. It can also contain more sulfur, leading to SOx emissions. - Petrol (Gasoline): Petrol combustion produces significant amounts of CO, NOx, and unburnt hydrocarbons. While generally producing less PM than diesel, its emissions of other pollutants can be substantial. - CNG (Compressed Natural Gas): CNG is primarily methane (CH4). Burning CNG is considered much cleaner than burning petrol or diesel. It produces significantly lower levels of PM, CO, NOx, and hydrocarbons. It contains virtually no sulfur, so no SOx emissions. Ranking from most polluting to least polluting per kilogram burned (considering typical emissions profiles): Diesel > Petrol > CNG. Therefore, the decreasing order of air pollution caused is Diesel, Petrol, CNG. Understand the relative environmental impact and pollution characteristics of common fuels like Diesel, Petrol, and CNG. CNG is generally considered the cleanest of the three in terms of air pollutant emissions.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/arrange-the-following-fuels-in-the-decreasing-order-of-air-pollution-c\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:14:17+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/arrange-the-following-fuels-in-the-decreasing-order-of-air-pollution-c\/","url":"https:\/\/exam.pscnotes.com\/mcq\/arrange-the-following-fuels-in-the-decreasing-order-of-air-pollution-c\/","name":"Arrange the following fuels in the decreasing order of air pollution c","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:14:17+00:00","dateModified":"2025-06-01T10:14:17+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The question asks to arrange fuels in decreasing order of air pollution caused by burning a kilogram of each. Generally, different fuels produce varying amounts of pollutants like particulate matter (PM), nitrogen oxides (NOx), carbon monoxide (CO), hydrocarbons, and sulfur oxides (SOx). - Diesel: Diesel fuel is heavier than petrol and its combustion typically produces more particulate matter and higher levels of NOx, especially from older engines or those without modern emission controls. It can also contain more sulfur, leading to SOx emissions. - Petrol (Gasoline): Petrol combustion produces significant amounts of CO, NOx, and unburnt hydrocarbons. While generally producing less PM than diesel, its emissions of other pollutants can be substantial. - CNG (Compressed Natural Gas): CNG is primarily methane (CH4). Burning CNG is considered much cleaner than burning petrol or diesel. It produces significantly lower levels of PM, CO, NOx, and hydrocarbons. It contains virtually no sulfur, so no SOx emissions. Ranking from most polluting to least polluting per kilogram burned (considering typical emissions profiles): Diesel > Petrol > CNG. Therefore, the decreasing order of air pollution caused is Diesel, Petrol, CNG. Understand the relative environmental impact and pollution characteristics of common fuels like Diesel, Petrol, and CNG. CNG is generally considered the cleanest of the three in terms of air pollutant emissions.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/arrange-the-following-fuels-in-the-decreasing-order-of-air-pollution-c\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/arrange-the-following-fuels-in-the-decreasing-order-of-air-pollution-c\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/arrange-the-following-fuels-in-the-decreasing-order-of-air-pollution-c\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CAPF","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-capf\/"},{"@type":"ListItem","position":3,"name":"Arrange the following fuels in the decreasing order of air pollution c"}]},{"@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\/89821","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=89821"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/89821\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=89821"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=89821"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=89821"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}