{"id":90933,"date":"2025-06-01T10:41:29","date_gmt":"2025-06-01T10:41:29","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90933"},"modified":"2025-06-01T10:41:29","modified_gmt":"2025-06-01T10:41:29","slug":"which-one-of-the-following-statements-correctly-defines-pm1-particles","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-correctly-defines-pm1-particles\/","title":{"rendered":"Which one of the following statements correctly defines PM1 particles"},"content":{"rendered":"

Which one of the following statements correctly defines PM1 particles in air ?<\/p>\n

[amp_mcq option1=”These are suspended particles of diameter more than 10 micron” option2=”These are the particles that are filtered by the nose during respiration” option3=”These are extreme fine particles of diameter less than 1 micron” option4=”These are coarse particles that penetrate directly through the lungs into the bloodstream” correct=”option3″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC CAPF – 2024<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nPM stands for Particulate Matter, which is a mixture of solid particles and liquid droplets found in the air. The number designation (e.g., PM10, PM2.5, PM1) refers to the maximum diameter of the particles in micrometers (microns). PM1 particles are defined as extremely fine particles that have a diameter less than 1 micrometer. These are smaller than PM2.5 and PM10 particles.
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\nPM classification is based on the aerodynamic diameter of airborne particulate matter. PM1 < 1 \u00b5m, PM2.5 < 2.5 \u00b5m, PM10 < 10 \u00b5m. Smaller particles can penetrate deeper into the respiratory system.\n<\/section>\n
\nPM1 particles are considered among the most harmful air pollutants because their small size allows them to be inhaled deeply into the lungs and potentially enter the bloodstream. They are often associated with combustion processes (vehicle exhaust, industrial emissions, power plants) and can contribute to respiratory and cardiovascular diseases.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements correctly defines PM1 particles in air ? [amp_mcq option1=”These are suspended particles of diameter more than 10 micron” option2=”These are the particles that are filtered by the nose during respiration” option3=”These are extreme fine particles of diameter less than 1 micron” option4=”These are coarse particles that penetrate directly through … <\/p>\n

Detailed SolutionWhich one of the following statements correctly defines PM1 particles<\/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":[1103,1136,1137],"class_list":["post-90933","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1103","tag-environment-and-ecology","tag-pollution","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements correctly defines PM1 particles<\/title>\n<meta name=\"description\" content=\"PM stands for Particulate Matter, which is a mixture of solid particles and liquid droplets found in the air. The number designation (e.g., PM10, PM2.5, PM1) refers to the maximum diameter of the particles in micrometers (microns). PM1 particles are defined as extremely fine particles that have a diameter less than 1 micrometer. These are smaller than PM2.5 and PM10 particles. PM classification is based on the aerodynamic diameter of airborne particulate matter. PM1 < 1 \u00b5m, PM2.5 < 2.5 \u00b5m, PM10 < 10 \u00b5m. Smaller particles can penetrate deeper into the respiratory system.\" \/>\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\/which-one-of-the-following-statements-correctly-defines-pm1-particles\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following statements correctly defines PM1 particles\" \/>\n<meta property=\"og:description\" content=\"PM stands for Particulate Matter, which is a mixture of solid particles and liquid droplets found in the air. The number designation (e.g., PM10, PM2.5, PM1) refers to the maximum diameter of the particles in micrometers (microns). PM1 particles are defined as extremely fine particles that have a diameter less than 1 micrometer. These are smaller than PM2.5 and PM10 particles. PM classification is based on the aerodynamic diameter of airborne particulate matter. PM1 < 1 \u00b5m, PM2.5 < 2.5 \u00b5m, PM10 < 10 \u00b5m. Smaller particles can penetrate deeper into the respiratory system.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-correctly-defines-pm1-particles\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:41:29+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":"Which one of the following statements correctly defines PM1 particles","description":"PM stands for Particulate Matter, which is a mixture of solid particles and liquid droplets found in the air. The number designation (e.g., PM10, PM2.5, PM1) refers to the maximum diameter of the particles in micrometers (microns). PM1 particles are defined as extremely fine particles that have a diameter less than 1 micrometer. These are smaller than PM2.5 and PM10 particles. PM classification is based on the aerodynamic diameter of airborne particulate matter. PM1 < 1 \u00b5m, PM2.5 < 2.5 \u00b5m, PM10 < 10 \u00b5m. 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PM1 < 1 \u00b5m, PM2.5 < 2.5 \u00b5m, PM10 < 10 \u00b5m. Smaller particles can penetrate deeper into the respiratory system.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-correctly-defines-pm1-particles\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:41:29+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\/which-one-of-the-following-statements-correctly-defines-pm1-particles\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-correctly-defines-pm1-particles\/","name":"Which one of the following statements correctly defines PM1 particles","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:41:29+00:00","dateModified":"2025-06-01T10:41:29+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"PM stands for Particulate Matter, which is a mixture of solid particles and liquid droplets found in the air. The number designation (e.g., PM10, PM2.5, PM1) refers to the maximum diameter of the particles in micrometers (microns). PM1 particles are defined as extremely fine particles that have a diameter less than 1 micrometer. These are smaller than PM2.5 and PM10 particles. PM classification is based on the aerodynamic diameter of airborne particulate matter. PM1 < 1 \u00b5m, PM2.5 < 2.5 \u00b5m, PM10 < 10 \u00b5m. 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