{"id":5546,"date":"2025-12-26T17:17:35","date_gmt":"2025-12-26T17:17:35","guid":{"rendered":"https:\/\/mehnatt.com\/?p=5546"},"modified":"2025-12-26T17:17:36","modified_gmt":"2025-12-26T17:17:36","slug":"mcqs-based-on-environment-40","status":"publish","type":"post","link":"https:\/\/mehnatt.com\/?p=5546","title":{"rendered":"MCQs Based On Environment &#8211; (40)"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Q1. What is the pH range below which rain is considered &#8220;acid rain&#8221;?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Below 6.5<\/li>\n\n\n\n<li style=\"font-size:17px\">Below 6.0<\/li>\n\n\n\n<li style=\"font-size:17px\">Below 5.6<\/li>\n\n\n\n<li style=\"font-size:17px\">Below 7.0<\/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. Below 5.6. <br\/>\n<strong>Explanation:<\/strong> Normal rain is slightly acidic with a pH around 5.6 due to the natural presence of carbon dioxide. However, when rain has a pH below 5.6, it is classified as acid rain. This increased acidity is primarily caused by the presence of sulfuric and nitric acids formed from SO\u2082 and NO\u2093 in the atmosphere.\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 natural source of sulfur oxides?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Industrial smelting<\/li>\n\n\n\n<li style=\"font-size:17px\">Burning of coal<\/li>\n\n\n\n<li style=\"font-size:17px\">Car exhausts<\/li>\n\n\n\n<li style=\"font-size:17px\">Volcanic eruptions<\/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. Volcanic eruptions. <br\/>\n<strong>Explanation:<\/strong> While burning coal and industrial smelting are major anthropogenic sources, volcanic eruptions are a significant natural source of sulfur oxides (mainly SO\u2082). These gases, when released into the atmosphere, can contribute to acid rain formation.\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. Which pollutant is primarily responsible for the corrosion of buildings due to acid rain?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Ozone<\/li>\n\n\n\n<li style=\"font-size:17px\">Carbon monoxide<\/li>\n\n\n\n<li style=\"font-size:17px\">Sulfur dioxide<\/li>\n\n\n\n<li style=\"font-size:17px\">Methane<\/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. Sulfur dioxide. <br\/>\n<strong>Explanation:<\/strong> Sulfur dioxide (SO\u2082) reacts with water vapor and oxygen in the atmosphere to form sulfuric acid, which contributes to acid rain. When acid rain falls on buildings\u2014especially those made of limestone or marble\u2014it reacts chemically with the surface, leading to corrosion and damage over time.\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. What role do lichens play in detecting air pollution?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Neutralize acid rain<\/li>\n\n\n\n<li style=\"font-size:17px\">Act as bio-indicators<\/li>\n\n\n\n<li style=\"font-size:17px\">Absorb heavy metals from air<\/li>\n\n\n\n<li style=\"font-size:17px\">Produce oxygen in polluted areas<\/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. Act as bio-indicators <br\/>\n<strong>Explanation:<\/strong> Lichens are extremely sensitive to air pollutants, especially sulfur dioxide. Because they cannot survive in polluted air, their presence or absence indicates air quality. Hence, they are widely used as bio-indicators of air pollution.\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 used in buffering acidified water bodies?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Sodium chloride<\/li>\n\n\n\n<li style=\"font-size:17px\">Calcium oxide or calcium carbonate<\/li>\n\n\n\n<li style=\"font-size:17px\">Ammonia<\/li>\n\n\n\n<li style=\"font-size:17px\">Hydrogen peroxide<\/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. Calcium oxide or calcium carbonate <br\/>\n<strong>Explanation:<\/strong> To neutralize acidified lakes or soils, substances like lime (calcium oxide) or limestone (calcium carbonate) are added. These substances increase the pH and restore the natural buffering capacity of water bodies or soil affected by acid rain.\n<\/div>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n","protected":false},"excerpt":{"rendered":"<p>Q1. What is the pH range below which rain is considered &#8220;acid rain&#8221;? View Answer Correct Option: 3. Below 5.6. Explanation: Normal rain is slightly acidic with a pH around 5.6 due to the natural presence of carbon dioxide. However, when rain has a pH below 5.6, it is classified as acid rain. This increased [&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":[1080,1084,222,21,30,1083,31,1081,221,20,1082],"class_list":["post-5546","post","type-post","status-publish","format-standard","hentry","category-environment","tag-acid-rain","tag-acidified-water-bodies","tag-bank-exams","tag-competitive-exams","tag-environment","tag-lichens","tag-mcq","tag-ph-range","tag-rrb-exams","tag-ssc-cgl","tag-sulfur-oxides"],"_links":{"self":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5546","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=5546"}],"version-history":[{"count":6,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5546\/revisions"}],"predecessor-version":[{"id":5552,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5546\/revisions\/5552"}],"wp:attachment":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5546"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5546"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5546"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}