{"id":5321,"date":"2025-11-21T16:16:31","date_gmt":"2025-11-21T16:16:31","guid":{"rendered":"https:\/\/mehnatt.com\/?p=5321"},"modified":"2025-11-21T16:16:31","modified_gmt":"2025-11-21T16:16:31","slug":"mcqs-based-on-environment-26","status":"publish","type":"post","link":"https:\/\/mehnatt.com\/?p=5321","title":{"rendered":"MCQs Based On Environment &#8211; (26)"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Q1. Which of the following is a secondary pollutant?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Carbon monoxide (CO)<\/li>\n\n\n\n<li style=\"font-size:17px\">Sulphur dioxide (SO\u2082)<\/li>\n\n\n\n<li style=\"font-size:17px\">Peroxyacetyl nitrate (PAN)<\/li>\n\n\n\n<li style=\"font-size:17px\">Lead (Pb)<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 3. Peroxyacetyl nitrate (PAN) <br\/>\n<strong>Explanation:<\/strong> PAN is a secondary pollutant formed by the reaction of nitrogen oxides and hydrocarbons in the presence of sunlight. Unlike primary pollutants, it does not enter the environment directly but is produced through photochemical reactions in the atmosphere.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q2. Which of the following is a non-biodegradable pollutant?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li>DDT<\/li>\n\n\n\n<li>Paper<\/li>\n\n\n\n<li>Sewage<\/li>\n\n\n\n<li>Vegetable waste<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 1. DDT <br\/>\n<strong>Explanation:<\/strong> DDT (Dichloro-Diphenyl-Trichloroethane) is a synthetic pesticide that does not decompose naturally, making it a non-biodegradable pollutant. It accumulates in the food chain, causing long-term ecological damage.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q3. What type of pollutant is carbon dioxide (CO\u2082) when present in excess?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Qualitative pollutant<\/li>\n\n\n\n<li style=\"font-size:17px\">Quantitative pollutant<\/li>\n\n\n\n<li style=\"font-size:17px\">Biodegradable pollutant<\/li>\n\n\n\n<li style=\"font-size:17px\">Secondary pollutant<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 2. Quantitative pollutant <br\/>\n<strong>Explanation:<\/strong> Carbon dioxide occurs naturally in the environment, but it becomes a pollutant when its concentration exceeds the normal threshold. Hence, it&#8217;s called a quantitative pollutant.<br\/><br\/>\n<b>A. Qualitative Pollutant<\/b><br\/>\n\n<b>Definition:<\/b><br\/>\nQualitative pollutants are man-made chemicals or materials that do not naturally occur in the environment.<br\/>\n\n<b>Examples:<\/b><br\/>\nPesticides (like DDT), fungicides, herbicides, CFCs.<br\/><br\/>\n<b>B. Quantitative Pollutant<\/b><br\/>\n\n<b>Definition:<\/b><br\/>\nQuantitative pollutants are substances that exist naturally in the environment, but become harmful when their concentration exceeds the threshold level.<br\/>\n\n<b>Examples:<\/b><br\/>\n\n&bull; Carbon dioxide (CO\u2082)<br\/>\n\n&bull; Nitrogen oxides (NO\u2093)<br\/>\n\n&bull; Sulphur dioxide (SO\u2082)<br\/>\nCO\u2082 is naturally produced by respiration, decomposition, volcanic eruptions, etc.\nBut human activities like burning of fossil fuels increase its levels beyond the safe threshold, making it a quantitative pollutant.<br\/><br\/>\n<b>C. Biodegradable Pollutant<\/b><br\/>\n\n<b>Definition:<\/b><br\/>\nThese are pollutants that can be broken down into simpler, harmless substances by microorganisms.<br\/>\n\n<b>Examples:<\/b><br\/>\n\n&bull; Organic waste (e.g., food waste, sewage)<br\/>\n\n&bull; Agricultural residue<br\/>\n\n&bull; Paper<br\/>\nCO\u2082 is a gas, not an organic waste material, and microbes don\u2019t break it down like they do with food or sewage. Also, gases are not classified as biodegradable\/non-biodegradable.<br\/><br\/>\n<b>D. Secondary Pollutant<\/b><br\/>\n\n<b>Definition:<\/b><br\/>\nSecondary pollutants are not directly emitted into the environment.\nThey form in the atmosphere by chemical reactions involving primary pollutants.<br\/>\n\n<b>Examples:<\/b><br\/>\n\n&bull; Ozone (O\u2083)<br\/>\n\n&bull; Peroxyacetyl nitrate (PAN)<br\/>\n\n&bull; Smog<br\/>\nCO\u2082 is a primary pollutant because it is directly released through burning fossil fuels and respiration. It is not formed by a reaction in the atmosphere, so it is not a secondary pollutant.\n\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q4. Which of the following is a qualitative pollutant?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Ozone (O\u2083)<\/li>\n\n\n\n<li style=\"font-size:17px\">Carbon monoxide (CO)<\/li>\n\n\n\n<li style=\"font-size:17px\">Nitrogen dioxide (NO\u2082)<\/li>\n\n\n\n<li style=\"font-size:17px\">Fungicides<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 4. Fungicides <br\/>\n<strong>Explanation:<\/strong> Qualitative pollutants are not naturally present in the environment and are introduced through human activities. Fungicides are synthetic chemicals used in agriculture and are not found naturally.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h3 class=\"wp-block-heading\">Q5. Which of the following is a natural source of pollution?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Forest fire<\/li>\n\n\n\n<li style=\"font-size:17px\">Industrial discharge<\/li>\n\n\n\n<li style=\"font-size:17px\">Vehicular emissions<\/li>\n\n\n\n<li style=\"font-size:17px\">Plastic waste<\/li>\n<\/ol>\n\n\n\n<button class=\"acc\">View Answer<\/button>\n<div class=\"pnl\">\n  <p style=\"padding-top:5px;color:#27302a;font-size:1.2rem;\"><b>Correct Option:<\/b> 1. Forest fire <br\/>\n<strong>Explanation:<\/strong> Forest fires are natural phenomena and can release large amounts of smoke, carbon monoxide, and particulate matter into the air, contributing to natural air pollution.\n\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n","protected":false},"excerpt":{"rendered":"<p>Q1. Which of the following is a secondary pollutant? View Answer Correct Option: 3. Peroxyacetyl nitrate (PAN) Explanation: PAN is a secondary pollutant formed by the reaction of nitrogen oxides and hydrocarbons in the presence of sunlight. Unlike primary pollutants, it does not enter the environment directly but is produced through photochemical reactions in the [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"set","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"var(--ast-global-color-4)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[19],"tags":[16,107,21,108,31,106,15,105,20,14],"class_list":["post-5321","post","type-post","status-publish","format-standard","hentry","category-environment","tag-bank","tag-co2","tag-competitive-exams","tag-fungicides","tag-mcq","tag-non-biodegradable-pollutants","tag-rrb","tag-secondary-pollutants","tag-ssc-cgl","tag-ssc-competitive-exams"],"_links":{"self":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5321","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcomments&post=5321"}],"version-history":[{"count":6,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5321\/revisions"}],"predecessor-version":[{"id":5327,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5321\/revisions\/5327"}],"wp:attachment":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5321"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5321"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5321"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}