{"id":25592798,"date":"2026-07-30T10:00:22","date_gmt":"2026-07-30T04:30:22","guid":{"rendered":"https:\/\/entri.app\/blog\/?p=25592798"},"modified":"2026-07-30T11:08:10","modified_gmt":"2026-07-30T05:38:10","slug":"kerala-psc-environmental-science-model-questions","status":"publish","type":"post","link":"https:\/\/entri.app\/blog\/kerala-psc-environmental-science-model-questions\/","title":{"rendered":"Kerala PSC Environmental Science Model Questions &#038; Answers 2026 &#8211; Latest MCQs"},"content":{"rendered":"<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_85 counter-hierarchy ez-toc-counter ez-toc-custom ez-toc-container-direction\">\n<p class=\"ez-toc-title\" style=\"cursor:inherit\">Table of Contents<\/p>\n<label for=\"ez-toc-cssicon-toggle-item-6a8593d544a01\" class=\"ez-toc-cssicon-toggle-label\"><span class=\"\"><span class=\"eztoc-hide\" style=\"display:none;\">Toggle<\/span><span class=\"ez-toc-icon-toggle-span\"><svg style=\"fill: #999;color:#999\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" class=\"list-377408\" width=\"20px\" height=\"20px\" viewBox=\"0 0 24 24\" fill=\"none\"><path d=\"M6 6H4v2h2V6zm14 0H8v2h12V6zM4 11h2v2H4v-2zm16 0H8v2h12v-2zM4 16h2v2H4v-2zm16 0H8v2h12v-2z\" fill=\"currentColor\"><\/path><\/svg><svg style=\"fill: #999;color:#999\" class=\"arrow-unsorted-368013\" xmlns=\"http:\/\/www.w3.org\/2000\/svg\" width=\"10px\" height=\"10px\" viewBox=\"0 0 24 24\" version=\"1.2\" baseProfile=\"tiny\"><path d=\"M18.2 9.3l-6.2-6.3-6.2 6.3c-.2.2-.3.4-.3.7s.1.5.3.7c.2.2.4.3.7.3h11c.3 0 .5-.1.7-.3.2-.2.3-.5.3-.7s-.1-.5-.3-.7zM5.8 14.7l6.2 6.3 6.2-6.3c.2-.2.3-.5.3-.7s-.1-.5-.3-.7c-.2-.2-.4-.3-.7-.3h-11c-.3 0-.5.1-.7.3-.2.2-.3.5-.3.7s.1.5.3.7z\"\/><\/svg><\/span><\/span><\/label><input type=\"checkbox\"  id=\"ez-toc-cssicon-toggle-item-6a8593d544a01\"  aria-label=\"Toggle\" \/><nav><ul class='ez-toc-list ez-toc-list-level-1 ' ><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-1\" href=\"https:\/\/entri.app\/blog\/kerala-psc-environmental-science-model-questions\/#Kerala_PSC_Environmental_Science_Model_Questions_2026_PDF_Download_%E2%80%93_50_MCQs\" >Kerala PSC Environmental Science Model Questions 2026 PDF Download &#8211; 50 MCQs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/entri.app\/blog\/kerala-psc-environmental-science-model-questions\/#Why_Environmental_Science_Matters_in_Kerala_PSC_Exams\" >Why Environmental Science Matters in Kerala PSC Exams<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/entri.app\/blog\/kerala-psc-environmental-science-model-questions\/#Kerala_PSC_Environmental_Science_Model_Questions_Answers_%E2%80%93_25_MCQs\" >Kerala PSC Environmental Science Model Questions &amp; Answers\u00a0 &#8211; 25 MCQs<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/entri.app\/blog\/kerala-psc-environmental-science-model-questions\/#Preparation_Strategy_for_Environmental_Science_in_Kerala_PSC_Exams\" >Preparation Strategy for Environmental Science in Kerala PSC Exams<\/a><\/li><\/ul><\/nav><\/div>\n<p>Kerala PSC Environmental Science Model Questions &amp; Answers 2026! Environmental Science is one of the most scoring yet frequently underestimated sections across Kerala PSC exams \u2014 from LDC and LGS to Degree Level, Secretariat Assistant, and various departmental tests. With questions drawn from ecology, biodiversity, pollution control, climate change, and Kerala-specific environmental issues, this section rewards focused, structured preparation. This guide brings together high-yield model questions, answers, and a topic-wise breakdown to help you prepare efficiently for your upcoming Kerala PSC exam.<\/p>\n<h2><span class=\"ez-toc-section\" id=\"Kerala_PSC_Environmental_Science_Model_Questions_2026_PDF_Download_%E2%80%93_50_MCQs\"><\/span><strong> Kerala PSC Environmental Science Model Questions 2026 PDF Download &#8211; 50 MCQs<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p>Download the Kerala PSC Environmental Science Quiz PDF to practice important MCQs based on the latest exam pattern. It&#8217;s perfect for quick revision and self-assessment before the exam.<\/p>\n<div class=\"lead-gen-block\"><a href=\"https:\/\/entri.app\/blog\/wp-content\/uploads\/2026\/07\/Kerala-PSC-Environmental-Science-Questions.pdf\" data-url=\"https:\/\/entri.app\/blog\/wp-content\/uploads\/2026\/07\/Kerala-PSC-Environmental-Science-Questions.pdf\" class=\"lead-pdf-download\" data-id=\"25556384\">\n<p style=\"text-align: center;\"><button class=\"btn btn-default\">Environmental Science Questions<\/button><\/p>\n<\/a><\/div>\n<h2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Why_Environmental_Science_Matters_in_Kerala_PSC_Exams\"><\/span><strong>Why Environmental Science Matters in Kerala PSC Exams<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\">Environmental Science typically carries 5 to 10 questions in the General Knowledge\/General Science section of most Kerala PSC exams. Given Kerala&#8217;s unique ecological profile \u2014 the Western Ghats, Periyar Tiger Reserve, Vembanad wetlands, and its status as a biodiversity hotspot \u2014 a significant share of questions combine general environmental concepts with Kerala-specific case studies.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\">Candidates preparing for the following exams will find this section especially relevant:<\/p>\n<div class=\"overflow-x-auto w-full px-2 mb-6 print:overflow-x-visible\" dir=\"ltr\">\n<table class=\"min-w-full border-collapse text-sm leading-[1.7] whitespace-normal\">\n<thead class=\"text-left\">\n<tr>\n<th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Exam<\/th>\n<th class=\"text-text-100 border-b-0.5 border-[hsl(var(--border-300)\/0.6)] py-2 pr-4 align-top font-bold\" scope=\"col\">Environmental Science Weightage<\/th>\n<\/tr>\n<\/thead>\n<tbody>\n<tr>\n<td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">LDC (Lower Division Clerk)<\/td>\n<td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">5\u20138 questions<\/td>\n<\/tr>\n<tr>\n<td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">LGS (Last Grade Servant)<\/td>\n<td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">4\u20136 questions<\/td>\n<\/tr>\n<tr>\n<td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Degree Level Prelims<\/td>\n<td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">8\u201310 questions<\/td>\n<\/tr>\n<tr>\n<td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Secretariat Assistant<\/td>\n<td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">6\u20138 questions<\/td>\n<\/tr>\n<tr>\n<td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">University Assistant<\/td>\n<td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">5\u20137 questions<\/td>\n<\/tr>\n<tr>\n<td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">Forest\/Wildlife Department posts<\/td>\n<td class=\"border-b-0.5 border-[hsl(var(--border-300)\/0.3)] py-2 pr-4 align-top\">15\u201320+ questions<\/td>\n<\/tr>\n<\/tbody>\n<\/table>\n<h2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Kerala_PSC_Environmental_Science_Model_Questions_Answers_%E2%80%93_25_MCQs\"><\/span><strong>Kerala PSC Environmental Science Model Questions &amp; Answers\u00a0 &#8211; 25 MCQs<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<h4 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" dir=\"ltr\" style=\"text-align: center;\">Section 1: Basic Ecology and Ecosystems<\/h4>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>1. Which trophic level do decomposers occupy in an ecosystem?<\/strong><br \/>\nDecomposers act as the final link in the food chain, breaking down organic matter and returning nutrients to the soil. They do not occupy a fixed numbered trophic level but function across all levels.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>2. What is the term for the number of different species in a given area?<\/strong><br \/>\nSpecies richness.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>3. Which biogeochemical cycle involves nitrogen fixation by bacteria such as <em>Rhizobium<\/em>?<\/strong><br \/>\nThe Nitrogen Cycle.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>4. What is an ecotone?<\/strong><br \/>\nA transition zone between two different ecosystems, such as the boundary between a forest and a grassland, which often shows higher biodiversity than either adjoining ecosystem.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>5. Which pyramid in an ecosystem is always upright?<\/strong><br \/>\nThe pyramid of energy.<\/p>\n<h4 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" dir=\"ltr\" style=\"text-align: center;\">Section 2: Kerala-Specific Environmental Topics<\/h4>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>6. Which mountain range, known as one of the world&#8217;s biodiversity hotspots, runs along Kerala&#8217;s eastern border?<\/strong><br \/>\nThe Western Ghats.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>7. Periyar Tiger Reserve is located in which district of Kerala?<\/strong><br \/>\nIdukki district.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>8. Which Kerala wetland is designated as a Ramsar site and is known for its backwaters?<\/strong><br \/>\nVembanad Lake.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>9. What is the local name for the traditional rain-fed paddy wetland ecosystem found in Kuttanad?<\/strong><br \/>\nKaipad and Pokkali cultivation are associated systems, with Kuttanad itself lying below sea level and farmed using unique reclamation methods.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>10. Silent Valley National Park, famous for opposing a hydroelectric project in the 1970s-80s, is located in which district?<\/strong><br \/>\nPalakkad district.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>11. Which committee&#8217;s report led to significant discussion on the ecological fragility of the Western Ghats?<\/strong><br \/>\nThe Madhav Gadgil Committee (Western Ghats Ecology Expert Panel) report, followed later by the Kasturirangan Committee report.<\/p>\n<h4 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" dir=\"ltr\" style=\"text-align: center;\">Section 3: Pollution and Environmental Degradation<\/h4>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>12. Which gas is primarily responsible for the depletion of the ozone layer?<\/strong><br \/>\nChlorofluorocarbons (CFCs).<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>13. BOD is a key indicator used to measure which type of pollution?<\/strong><br \/>\nWater pollution \u2014 Biochemical Oxygen Demand measures the amount of dissolved oxygen consumed by microorganisms in decomposing organic matter.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>14. Which act in India specifically deals with the prevention and control of water pollution?<\/strong><br \/>\nThe Water (Prevention and Control of Pollution) Act, 1974.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>15. What does the Air Quality Index (AQI) primarily measure?<\/strong><br \/>\nThe concentration of pollutants such as PM2.5, PM10, NO2, SO2, CO, and ozone in ambient air, converted into a standardized scale.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>16. Endosulfan, a pesticide linked to serious health and environmental damage in Kerala, was most notably associated with which district?<\/strong><br \/>\nKasaragod district.<\/p>\n<h4 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" dir=\"ltr\" style=\"text-align: center;\">Section 4: Climate Change and Global Environmental Concerns<\/h4>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>17. Which international agreement, adopted in 2015, aims to limit global warming to well below 2\u00b0C?<\/strong><br \/>\nThe Paris Agreement.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>18. What is the primary greenhouse gas contributing to global warming?<\/strong><br \/>\nCarbon dioxide (CO\u2082).<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>19. Which conference is regarded as the origin of the modern environmental movement, held in Stockholm in 1972?<\/strong><br \/>\nThe United Nations Conference on the Human Environment (Stockholm Conference).<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>20. What term describes the phenomenon of rising sea levels submerging low-lying coastal areas, a concern for Kerala&#8217;s coastline?<\/strong><br \/>\nCoastal erosion\/inundation due to sea-level rise.<\/p>\n<h4 class=\"text-text-100 mt-2 -mb-1 text-base font-bold\" dir=\"ltr\" style=\"text-align: center;\">Section 5: Environmental Laws and Institutions<\/h4>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>21. The Wildlife Protection Act was enacted in which year?<\/strong><br \/>\n1972.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>22. Which body is responsible for monitoring and enforcing environmental standards at the national level in India?<\/strong><br \/>\nThe Central Pollution Control Board (CPCB).<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>23. The Kerala State Pollution Control Board was established in which year?<\/strong><br \/>\n1974.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>24. Project Tiger, a wildlife conservation initiative, was launched in which year?<\/strong><br \/>\n1973.<\/p>\n<p class=\"font-claude-response-body break-words whitespace-normal\" dir=\"ltr\"><strong>25. Which schedule of the Wildlife Protection Act provides the highest degree of protection to species?<\/strong><br \/>\nSchedule I.<\/p>\n<h2 class=\"text-text-100 mt-3 -mb-1 text-[1.125rem] font-bold\" dir=\"ltr\"><span class=\"ez-toc-section\" id=\"Preparation_Strategy_for_Environmental_Science_in_Kerala_PSC_Exams\"><\/span><strong>Preparation Strategy for Environmental Science in Kerala PSC Exams<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n<ol class=\"[li_&amp;]:mb-0 [li_&amp;]:mt-1 [li_&amp;]:gap-1 [&amp;:not(:last-child)_ul]:pb-1 [&amp;:not(:last-child)_ol]:pb-1 list-decimal flex flex-col gap-1 pl-8 mb-3 print:block print:space-y-1\" dir=\"ltr\">\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Prioritize Kerala-specific content first<\/strong> \u2014 questions on Silent Valley, Periyar, Western Ghats committees, and local pollution case studies (like Endosulfan) appear disproportionately often compared to generic environmental theory.<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Set a timeline chart<\/strong> of major environmental acts, conferences, and committees \u2014 PSC frequently tests years and chronology.<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Revise using short, repeated cycles<\/strong> rather than one long reading session \u2014 environmental science facts are easy to confuse (BOD vs COD, CPCB vs SPCB) without spaced repetition.<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Practice previous year questions<\/strong> extensively, since Kerala PSC often repeats question patterns across different posts and years.<\/li>\n<li class=\"font-claude-response-body whitespace-normal break-words pl-2\"><strong>Link current affairs<\/strong> \u2014 environmental summits, Kerala govt initiatives, and biodiversity news often connect directly to static portions of the syllabus.<\/li>\n<\/ol>\n<p>Preparing for your Kerala PSC exam? <a href=\"https:\/\/webapp.entri.app\/home\" target=\"_blank\" rel=\"noopener\">Entri App<\/a> offers structured mock tests, detailed model question sets, and topic-wise study material designed specifically for Kerala PSC aspirants across LDC, LGS, Degree Level, and Secretariat Assistant exams. Practice with expert-curated content and track your progress as you prepare to crack your exam on the first attempt.<\/p>\n<div class=\"modal\" id=\"modal25556384\"><div class=\"modal-content\"><span class=\"close-button\">&times;<\/span>\n\n<div class=\"wpcf7 no-js\" id=\"wpcf7-f25556384-o1\" lang=\"en-US\" dir=\"ltr\" data-wpcf7-id=\"25556384\">\n<div class=\"screen-reader-response\"><p role=\"status\" aria-live=\"polite\" aria-atomic=\"true\"><\/p> <ul><\/ul><\/div>\n<form action=\"\/blog\/wp-json\/wp\/v2\/posts\/25592798#wpcf7-f25556384-o1\" method=\"post\" class=\"wpcf7-form init\" aria-label=\"Contact form\" novalidate=\"novalidate\" data-status=\"init\">\n<fieldset class=\"hidden-fields-container\"><input type=\"hidden\" name=\"_wpcf7\" value=\"25556384\" \/><input type=\"hidden\" name=\"_wpcf7_version\" value=\"6.1.6\" \/><input type=\"hidden\" name=\"_wpcf7_locale\" value=\"en_US\" \/><input type=\"hidden\" name=\"_wpcf7_unit_tag\" value=\"wpcf7-f25556384-o1\" \/><input 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<script>document.addEventListener(\"DOMContentLoaded\",function(){document.querySelectorAll('.wpcf7-form').forEach(function(e){e.addEventListener('submit',function(){if(document.getElementById('cf-turnstile-cf7-788189902')){setTimeout(function(){turnstile.reset('#cf-turnstile-cf7-788189902');},1000)}})})});<\/script> <\/div><br\/><input class=\"wpcf7-form-control wpcf7-submit has-spinner\" type=\"submit\" value=\"Submit\" \/>\n\t\t<\/p>\n\t<\/div>\n<\/div><div class=\"wpcf7-response-output\" aria-hidden=\"true\"><\/div>\n<\/form>\n<\/div>\n\n<\/div><\/div>\n<\/div>\n","protected":false},"excerpt":{"rendered":"<p>Kerala PSC Environmental Science Model Questions &amp; Answers 2026! Environmental Science is one of the most scoring yet frequently underestimated sections across Kerala PSC exams \u2014 from LDC and LGS to Degree Level, Secretariat Assistant, and various departmental tests. With questions drawn from ecology, biodiversity, pollution control, climate change, and Kerala-specific environmental issues, this section [&hellip;]<\/p>\n","protected":false},"author":115,"featured_media":25655592,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"footnotes":""},"categories":[802,32],"tags":[],"class_list":["post-25592798","post","type-post","status-publish","format-standard","has-post-thumbnail","hentry","category-articles","category-kerala-psc"],"acf":[],"yoast_head":"<!-- This site is optimized with the Yoast SEO plugin v28.1 - https:\/\/yoast.com\/product\/yoast-seo-wordpress\/ -->\n<title>Kerala PSC Environmental Science Questions &amp; Answers 2026<\/title>\n<meta name=\"description\" content=\"Kerala PSC Environmental Science model questions and answers for LDC, LGS, Degree Level, and Secretariat Assistant exams. Get MCQs!\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/entri.app\/blog\/kerala-psc-environmental-science-model-questions\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Kerala PSC Environmental Science Questions &amp; Answers 2026\" \/>\n<meta property=\"og:description\" content=\"Kerala PSC Environmental Science model questions and answers for LDC, LGS, Degree Level, and Secretariat Assistant exams. 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