{"id":5443,"date":"2025-12-26T17:09:48","date_gmt":"2025-12-26T17:09:48","guid":{"rendered":"https:\/\/mehnatt.com\/?p=5443"},"modified":"2025-12-26T17:09:48","modified_gmt":"2025-12-26T17:09:48","slug":"mcqs-based-on-environment-34","status":"publish","type":"post","link":"https:\/\/mehnatt.com\/?p=5443","title":{"rendered":"MCQs Based On Environment &#8211; (34)"},"content":{"rendered":"\n<h3 class=\"wp-block-heading\">Q1. Which of the following radioactive particles has the least penetration power?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Gamma rays<\/li>\n\n\n\n<li style=\"font-size:17px\">Beta particles<\/li>\n\n\n\n<li style=\"font-size:17px\">Alpha particles<\/li>\n\n\n\n<li style=\"font-size:17px\">X-rays<\/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. Alpha particles <br\/>\n<strong>Explanation:<\/strong> Alpha particles can be blocked by paper or skin, making them the least penetrating. Gamma rays and X-rays require dense materials like lead or concrete for shielding.\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. The harmful effects of ionizing radiation include all of the following EXCEPT:<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:16px\">Cancer<\/li>\n\n\n\n<li style=\"font-size:16px\">Mutations<\/li>\n\n\n\n<li style=\"font-size:16px\">Shortened life-span<\/li>\n\n\n\n<li style=\"font-size:16px\">Increased fertility<\/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. Increased fertility <br\/>\n<strong>Explanation:<\/strong> Ionizing radiation decreases fertility and can cause cancer, mutations, and reduced lifespan.\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. Which of the following is a natural source of radioactive pollution?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Nuclear power plants<\/li>\n\n\n\n<li style=\"font-size:17px\">Cosmic rays<\/li>\n\n\n\n<li style=\"font-size:17px\">Radiation therapy<\/li>\n\n\n\n<li style=\"font-size:17px\">Atomic explosions<\/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. Cosmic rays <br\/>\n<strong>Explanation:<\/strong> Cosmic rays and terrestrial radionuclides like Uranium-238 and Carbon-14 are natural sources. The rest are man-made.\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. The half-life of a radioactive substance refers to:<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Time required for half of the atoms to decay<\/li>\n\n\n\n<li style=\"font-size:17px\">Time to double the radioactive energy<\/li>\n\n\n\n<li style=\"font-size:17px\">Duration of human exposure<\/li>\n\n\n\n<li style=\"font-size:17px\">Time taken to disappear from the body<\/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. Time required for half of the atoms to decay <br\/>\n<strong>Explanation:<\/strong> Half-life is the time required for 50% of a radioactive substance to decay 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 materials can effectively block gamma rays?<\/h3>\n\n\n\n<ol class=\"wp-block-list\">\n<li style=\"font-size:17px\">Human skin<\/li>\n\n\n\n<li style=\"font-size:17px\">Glass<\/li>\n\n\n\n<li style=\"font-size:17px\">Paper<\/li>\n\n\n\n<li style=\"font-size:17px\">Thick concrete<\/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. Thick concrete <br\/>\n<strong>Explanation:<\/strong> Gamma rays are highly penetrating and require dense materials like thick concrete or lead for effective shielding.\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 radioactive particles has the least penetration power? View Answer Correct Option: 3. Alpha particles Explanation: Alpha particles can be blocked by paper or skin, making them the least penetrating. Gamma rays and X-rays require dense materials like lead or concrete for shielding. Q2. The harmful effects of ionizing radiation include [&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":[222,21,30,1057,31,1054,1055,1056,221,20],"class_list":["post-5443","post","type-post","status-publish","format-standard","hentry","category-environment","tag-bank-exams","tag-competitive-exams","tag-environment","tag-gamma-rays","tag-mcq","tag-radioactive-particles","tag-radioactive-pollution","tag-radioactive-substance","tag-rrb-exams","tag-ssc-cgl"],"_links":{"self":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5443","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=5443"}],"version-history":[{"count":6,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5443\/revisions"}],"predecessor-version":[{"id":5449,"href":"https:\/\/mehnatt.com\/index.php?rest_route=\/wp\/v2\/posts\/5443\/revisions\/5449"}],"wp:attachment":[{"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fmedia&parent=5443"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Fcategories&post=5443"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/mehnatt.com\/index.php?rest_route=%2Fwp%2Fv2%2Ftags&post=5443"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}