{"id":91093,"date":"2025-06-01T10:45:58","date_gmt":"2025-06-01T10:45:58","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=91093"},"modified":"2025-06-01T10:45:58","modified_gmt":"2025-06-01T10:45:58","slug":"photochemical-smog-is-a-resultant-of-the-reaction-among","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/photochemical-smog-is-a-resultant-of-the-reaction-among\/","title":{"rendered":"Photochemical smog is a resultant of the reaction among"},"content":{"rendered":"

Photochemical smog is a resultant of the reaction among<\/p>\n

[amp_mcq option1=”NO\u2082, O\u2083 and peroxyacetyl nitrate in the presence of sunlight” option2=”CO, O\u2082 and peroxyacetyl nitrate in the presence of sunlight” option3=”CO, CO\u2082 and NO\u2082 at low temperature” option4=”high concentration of NO\u2082, O\u2083 and CO in the evening” correct=”option1″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC IAS – 2013<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nPhotochemical smog is a complex mixture of air pollutants that forms when sunlight reacts with certain chemicals in the atmosphere. Key components and precursors include nitrogen oxides (NOx) and volatile organic compounds (VOCs). The resulting smog contains pollutants like ozone (O\u2083), peroxyacetyl nitrate (PAN), and aldehydes.
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\nThe formation of photochemical smog is driven by sunlight. Nitrogen dioxide (NO\u2082) is a primary pollutant that photodissociates in sunlight to form nitric oxide (NO) and atomic oxygen (O). This atomic oxygen quickly reacts with molecular oxygen (O\u2082) to form ozone (O\u2083). VOCs react with NOx and other atmospheric components in the presence of sunlight to form a variety of secondary pollutants, including PAN. Therefore, NO\u2082, O\u2083 (as a product), and PAN (as a product), with sunlight as the driving force, are central to photochemical smog.
\n<\/section>\n
\nPhotochemical smog is often referred to as “Los Angeles smog” because it was first recognized in Los Angeles. It differs from traditional “London smog” (sulfurous smog), which is caused by the burning of fossil fuels containing sulfur and occurs under cool, humid conditions. Photochemical smog is more common in sunny, dry climates with significant vehicular traffic.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Photochemical smog is a resultant of the reaction among [amp_mcq option1=”NO\u2082, O\u2083 and peroxyacetyl nitrate in the presence of sunlight” option2=”CO, O\u2082 and peroxyacetyl nitrate in the presence of sunlight” option3=”CO, CO\u2082 and NO\u2082 at low temperature” option4=”high concentration of NO\u2082, O\u2083 and CO in the evening” correct=”option1″] This question was previously asked in UPSC … <\/p>\n

Detailed SolutionPhotochemical smog is a resultant of the reaction among<\/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":[1092],"tags":[1467,1136,1137],"class_list":["post-91093","post","type-post","status-publish","format-standard","hentry","category-upsc-ias","tag-1467","tag-environment-and-ecology","tag-pollution","no-featured-image-padding"],"yoast_head":"\nPhotochemical smog is a resultant of the reaction among<\/title>\n<meta name=\"description\" content=\"Photochemical smog is a complex mixture of air pollutants that forms when sunlight reacts with certain chemicals in the atmosphere. Key components and precursors include nitrogen oxides (NOx) and volatile organic compounds (VOCs). The resulting smog contains pollutants like ozone (O\u2083), peroxyacetyl nitrate (PAN), and aldehydes. The formation of photochemical smog is driven by sunlight. Nitrogen dioxide (NO\u2082) is a primary pollutant that photodissociates in sunlight to form nitric oxide (NO) and atomic oxygen (O). This atomic oxygen quickly reacts with molecular oxygen (O\u2082) to form ozone (O\u2083). VOCs react with NOx and other atmospheric components in the presence of sunlight to form a variety of secondary pollutants, including PAN. Therefore, NO\u2082, O\u2083 (as a product), and PAN (as a product), with sunlight as the driving force, are central to photochemical smog.\" \/>\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\/photochemical-smog-is-a-resultant-of-the-reaction-among\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Photochemical smog is a resultant of the reaction among\" \/>\n<meta property=\"og:description\" content=\"Photochemical smog is a complex mixture of air pollutants that forms when sunlight reacts with certain chemicals in the atmosphere. Key components and precursors include nitrogen oxides (NOx) and volatile organic compounds (VOCs). The resulting smog contains pollutants like ozone (O\u2083), peroxyacetyl nitrate (PAN), and aldehydes. The formation of photochemical smog is driven by sunlight. Nitrogen dioxide (NO\u2082) is a primary pollutant that photodissociates in sunlight to form nitric oxide (NO) and atomic oxygen (O). This atomic oxygen quickly reacts with molecular oxygen (O\u2082) to form ozone (O\u2083). VOCs react with NOx and other atmospheric components in the presence of sunlight to form a variety of secondary pollutants, including PAN. Therefore, NO\u2082, O\u2083 (as a product), and PAN (as a product), with sunlight as the driving force, are central to photochemical smog.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/photochemical-smog-is-a-resultant-of-the-reaction-among\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:45:58+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":"Photochemical smog is a resultant of the reaction among","description":"Photochemical smog is a complex mixture of air pollutants that forms when sunlight reacts with certain chemicals in the atmosphere. Key components and precursors include nitrogen oxides (NOx) and volatile organic compounds (VOCs). The resulting smog contains pollutants like ozone (O\u2083), peroxyacetyl nitrate (PAN), and aldehydes. The formation of photochemical smog is driven by sunlight. Nitrogen dioxide (NO\u2082) is a primary pollutant that photodissociates in sunlight to form nitric oxide (NO) and atomic oxygen (O). This atomic oxygen quickly reacts with molecular oxygen (O\u2082) to form ozone (O\u2083). VOCs react with NOx and other atmospheric components in the presence of sunlight to form a variety of secondary pollutants, including PAN. Therefore, NO\u2082, O\u2083 (as a product), and PAN (as a product), with sunlight as the driving force, are central to photochemical smog.","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\/photochemical-smog-is-a-resultant-of-the-reaction-among\/","og_locale":"en_US","og_type":"article","og_title":"Photochemical smog is a resultant of the reaction among","og_description":"Photochemical smog is a complex mixture of air pollutants that forms when sunlight reacts with certain chemicals in the atmosphere. Key components and precursors include nitrogen oxides (NOx) and volatile organic compounds (VOCs). The resulting smog contains pollutants like ozone (O\u2083), peroxyacetyl nitrate (PAN), and aldehydes. The formation of photochemical smog is driven by sunlight. Nitrogen dioxide (NO\u2082) is a primary pollutant that photodissociates in sunlight to form nitric oxide (NO) and atomic oxygen (O). This atomic oxygen quickly reacts with molecular oxygen (O\u2082) to form ozone (O\u2083). VOCs react with NOx and other atmospheric components in the presence of sunlight to form a variety of secondary pollutants, including PAN. Therefore, NO\u2082, O\u2083 (as a product), and PAN (as a product), with sunlight as the driving force, are central to photochemical smog.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/photochemical-smog-is-a-resultant-of-the-reaction-among\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:45:58+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\/photochemical-smog-is-a-resultant-of-the-reaction-among\/","url":"https:\/\/exam.pscnotes.com\/mcq\/photochemical-smog-is-a-resultant-of-the-reaction-among\/","name":"Photochemical smog is a resultant of the reaction among","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:45:58+00:00","dateModified":"2025-06-01T10:45:58+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Photochemical smog is a complex mixture of air pollutants that forms when sunlight reacts with certain chemicals in the atmosphere. 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