{"id":852,"date":"2026-01-12T03:35:02","date_gmt":"2026-01-11T22:05:02","guid":{"rendered":"https:\/\/earningvista.com\/exam\/?p=852"},"modified":"2026-01-12T12:02:22","modified_gmt":"2026-01-12T06:32:22","slug":"physical-and-world-geography-wbcs-prelims-pyqs","status":"publish","type":"post","link":"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/","title":{"rendered":"Physical and World Geography: WBCS Prelims PYQs"},"content":{"rendered":"\n<div id=\"ez-toc-container\" class=\"ez-toc-v2_0_79_2 counter-hierarchy ez-toc-counter ez-toc-light-blue ez-toc-container-direction\">\n<div class=\"ez-toc-title-container\">\n<p class=\"ez-toc-title ez-toc-toggle\" style=\"cursor:pointer\">Contents<\/p>\n<span class=\"ez-toc-title-toggle\"><a href=\"#\" class=\"ez-toc-pull-right ez-toc-btn ez-toc-btn-xs ez-toc-btn-default ez-toc-toggle\" aria-label=\"Toggle Table of Content\"><span class=\"ez-toc-js-icon-con\"><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><\/span><\/a><\/span><\/div>\n<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:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2021\" >WBCS Preliminary Question \u2013 2021<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-2\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2020\" >WBCS Preliminary Question \u2013 2020<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-3\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2019\" >WBCS Preliminary Question \u2013 2019<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-4\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2018\" >WBCS Preliminary Question \u2013 2018<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-5\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2017\" >WBCS Preliminary Question \u2013 2017<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-6\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2016\" >WBCS Preliminary Question \u2013 2016<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-7\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2015\" >WBCS Preliminary Question \u2013 2015<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-8\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2014\" >WBCS Preliminary Question \u2013 2014<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-9\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2013\" >WBCS Preliminary Question \u2013 2013<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-10\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2012\" >WBCS Preliminary Question \u2013 2012<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-11\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2011\" >WBCS Preliminary Question \u2013 2011<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-12\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2015-2\" >WBCS Preliminary Question \u2013 2015<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-13\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2014-2\" >WBCS Preliminary Question \u2013 2014<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-14\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2013-2\" >WBCS Preliminary Question \u2013 2013<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-15\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2012-2\" >WBCS Preliminary Question \u2013 2012<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-16\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2011-2\" >WBCS Preliminary Question \u2013 2011<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-17\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2010\" >WBCS Preliminary Question \u2013 2010<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-18\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2008\" >WBCS Preliminary Question \u2013 2008<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-19\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2007\" >WBCS Preliminary Question \u2013 2007<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-20\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2005\" >WBCS Preliminary Question \u2013 2005<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-21\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2004\" >WBCS Preliminary Question \u2013 2004<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-22\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2003\" >WBCS Preliminary Question \u2013 2003<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-23\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2002\" >WBCS Preliminary Question \u2013 2002<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-24\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2001\" >WBCS Preliminary Question \u2013 2001<\/a><\/li><li class='ez-toc-page-1 ez-toc-heading-level-2'><a class=\"ez-toc-link ez-toc-heading-25\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/#WBCS_Preliminary_Question_%E2%80%93_2000\" >WBCS Preliminary Question \u2013 2000<\/a><\/li><\/ul><\/nav><\/div>\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2021\"><\/span><strong>WBCS Preliminary Question \u2013 2021<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>73. The ratio of the diameters of moon and earth is nearly \u2014<\/p>\n\n\n\n<p>(A) 1 : 2 (B) 1 : 5 (C) 1 : 4 (D) 1 : 8<\/p>\n\n\n\n<p>Correct Answer: (C) 1 : 4<\/p>\n\n\n\n<p>Explanation: The diameter of the Moon is approximately 3,474 km while Earth&#8217;s diameter is about 12,742 km This makes the Moon&#8217;s diameter roughly 27% (approx. 1\/4) of Earth&#8217;s.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Important Data:<\/strong> The Moon&#8217;s mass is about 1\/81 of Earth&#8217;s, and its gravity is 1\/6 of Earth&#8217;s gravity.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2020\"><\/span><strong>WBCS Preliminary Question \u2013 2020<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>59. Identify the correct pairs for Northern Hemisphere: <\/p>\n\n\n\n<p>1. Winter Solstice\u2013Dec 22nd,<\/p>\n\n\n\n<p> 2. Autumn Equinox\u2013Sept 23rd, <\/p>\n\n\n\n<p>3. Summer Solstice\u2013June 21st,<\/p>\n\n\n\n<p> 4. Spring Equinox\u2013March 21st.<\/p>\n\n\n\n<p>(A) 1 and 2 <\/p>\n\n\n\n<p>(B) 2 and 3<\/p>\n\n\n\n<p> (C) 3 and 4 <\/p>\n\n\n\n<p>(D) All are correctly matched<\/p>\n\n\n\n<p><strong>Correct Answer: (D) All are correctly matched<\/strong><\/p>\n\n\n\n<p>Explanation: These dates mark the transition of seasons. During Solstices, the sun reaches its highest or lowest excursion relative to the celestial equator. During Equinoxes, day and night are approximately equal everywhere on Earth.<\/p>\n\n\n\n<p>80. Light from the sun reaches us in nearly \u2014<\/p>\n\n\n\n<p>(A) 2 minutes<\/p>\n\n\n\n<p> (B) 8 minutes<\/p>\n\n\n\n<p> (C) 4 minutes <\/p>\n\n\n\n<p>(D) 16 minutes<\/p>\n\n\n\n<p><strong>Correct Answer: (B) 8 minutes<\/strong><\/p>\n\n\n\n<p>Explanation: Light travels at 3\u00d7 10^8 m\/sThe average distance from the Sun to Earth is about 150 million km. It takes approximately 8 minutes and 20 seconds for sunlight to reach Earth.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Important Data:<\/strong> Light from the Moon reaches Earth in just 1.3seconds.<\/li>\n<\/ul>\n\n\n\n<p>104. The scale used for measuring the intensity of the earthquake is \u2014<\/p>\n\n\n\n<p>(A) Metric scale <\/p>\n\n\n\n<p>(B) Quake scale <\/p>\n\n\n\n<p>(C) Richter scale<\/p>\n\n\n\n<p> (D) Epicenter scale<\/p>\n\n\n\n<p><strong>Correct Answer: (C) Richter scale<\/strong><\/p>\n\n\n\n<p>Explanation: The Richter scale measures the magnitude (energy released), while the Mercalli scale measures the intensity (damage caused). Richter is a logarithmic scale, meaning each whole number increase represents a ten-fold increase in measured amplitude.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2019\"><\/span><strong>WBCS Preliminary Question \u2013 2019<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>49. Mansarovar lake lies in \u2014<\/p>\n\n\n\n<p>(A) Karakoram Range<\/p>\n\n\n\n<p> (B) Pirpanjal Range <\/p>\n\n\n\n<p>(C) Kailas Range <\/p>\n\n\n\n<p>(D) Mahabharata Range<\/p>\n\n\n\n<p>C<strong>orrect Answer: (C) Kailas Range<\/strong><\/p>\n\n\n\n<p>Explanation: Lake Mansarovar is located in the Tibet Autonomous Region, near Mount Kailash. It is a high-altitude freshwater lake and is the source of major rivers like the Indus, Brahmaputra (Tsangpo), and Sutlej.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2018\"><\/span><strong>WBCS Preliminary Question \u2013 2018<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>51. On average, air contains ______ % of water vapour.<\/p>\n\n\n\n<p>(a) 1<\/p>\n\n\n\n<p> (b) 3 <\/p>\n\n\n\n<p>(c) 5<\/p>\n\n\n\n<p> (d) 7<\/p>\n\n\n\n<p>Correct Answer: (a) 1<\/p>\n\n\n\n<p>Explanation: Water vapour content in the atmosphere varies from 0% in dry polar regions to 4% in humid tropical regions. On a global average, it is approximately 1% to 2%.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Important Data:<\/strong> Water vapour is the most potent greenhouse gas in the atmosphere.<\/li>\n<\/ul>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2017\"><\/span><strong>WBCS Preliminary Question \u2013 2017<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>136. India\u2019s share of total land area in the world is about \u2014<\/p>\n\n\n\n<p>(A) 2.4 per cent <\/p>\n\n\n\n<p>(B) 2.8 per cent <\/p>\n\n\n\n<p>(C) 3.2 per cent<\/p>\n\n\n\n<p> (D) 3.6 per cent<\/p>\n\n\n\n<p><strong>Correct Answer: (A) 2.4 per cent<\/strong><\/p>\n\n\n\n<p>Explanation: India occupies 2.4% of the world&#8217;s land area 3.28 million sq. km but supports about 17.5% of the world&#8217;s population. This makes India the 7th largest country by area.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2016\"><\/span><strong>WBCS Preliminary Question \u2013 2016<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>131. Tropopause is: \u2014<\/p>\n\n\n\n<p>(A) A region between troposphere and stratosphere. <\/p>\n\n\n\n<p>(B) A natural umbrella above volcanic eruptions. <\/p>\n\n\n\n<p>(C) Both (A) and (B) <\/p>\n\n\n\n<p>(D) Neither (A) nor (B)<\/p>\n\n\n\n<p><strong>Correct Answer: (A) A region between troposphere and stratosphere.<\/strong><\/p>\n\n\n\n<p>Explanation: The Tropopause is the atmospheric boundary where the temperature stops decreasing with height. Its height is about 18 km at the equator and 8 km at the poles. It acts as a &#8220;lid&#8221; for most weather phenomena.<\/p>\n\n\n\n\n\n<p>121. For his model of industrial location, Weber makes use of: \u2014<\/p>\n\n\n\n<p>(A) Isogons (B) Isophenes (C) Isodapanes (D) Isotachs<\/p>\n\n\n\n<p>Correct Answer: (C) Isodapanes<\/p>\n\n\n\n<p>Explanation: Alfred Weber\u2019s Theory of Industrial Location uses Isodapanes (lines of equal total transport cost). Isotims are lines of equal transport cost for a single commodity. This model identifies the &#8220;Least Cost Location&#8221; for industries.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2015\"><\/span><strong>WBCS Preliminary Question \u2013 2015<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>77. If there were no atmosphere, the earth would have been \u2014<\/p>\n\n\n\n<p>(A) Slightly hot (B) Slightly cold (C) Very hot (D) Very cold<\/p>\n\n\n\n<p>Correct Answer: (D) Very cold<\/p>\n\n\n\n<p>Explanation: Without an atmosphere, there would be no Greenhouse Effect to trap heat. Earth&#8217;s average temperature would drop to approximately 18 degree C from the current 15 degree C, making it a frozen, lifeless planet.<\/p>\n\n\n\n<p>86. Geographical concentration of industries generates \u2014<\/p>\n\n\n\n<p>(A) Horizontal linkage only (B) Vertical linkage only (C) Both vertical and horizontal (D) No linkage<\/p>\n\n\n\n<p>Correct Answer: (C) Both vertical and horizontal linkages<\/p>\n\n\n\n<p>Explanation: Industrial clusters (Agglomeration) lead to Vertical linkages (supply chains between raw materials and finished goods) and Horizontal linkages (shared infrastructure, labor pools, and specialized services).<\/p>\n\n\n\n<p>119. In which layer of the atmosphere does ozone act as a UV radiation shield? \u2014<\/p>\n\n\n\n<p>(A) Troposphere (B) Thermosphere (C) Stratosphere (D) Mesosphere<\/p>\n\n\n\n<p><strong>Correct Answer: (C) Stratosphere<\/strong><\/p>\n\n\n\n<p>Explanation: The &#8220;Ozonosphere&#8221; is located within the Stratosphere (approx. 15-35km.) It absorbs 97-99 % of the Sun&#8217;s medium-frequency ultraviolet light UV-B which otherwise causes skin cancer and DNA damage.<\/p>\n\n\n\n<p>139. One of the characteristics of the atmosphere of prebiotic primitive earth was: \u2014<\/p>\n\n\n\n<p>(A) Absence of hydrogen (B) Absence of water vapour (C) Absence of nitrogen (D) Absence of oxygen<\/p>\n\n\n\n<p><strong>Correct Answer: (D) Absence of oxygen<\/strong><\/p>\n\n\n\n<p>Explanation: The primitive atmosphere was a &#8220;Reducing Atmosphere&#8221; consisting of Methane, Ammonia, Water Vapour, and Hydrogen. Free oxygen appeared much later through the process of photosynthesis by cyanobacteria.<\/p>\n\n\n\n<p>178. Theory of Plate Tectonics explains \u2014<\/p>\n\n\n\n<p>(A) Formation of Mountains (B) Sea floor spreading (C) Origin of earthquakes (D) All of the above<\/p>\n\n\n\n<p>Correct Answer: (D) All of the above<\/p>\n\n\n\n<p>Explanation: Proposed in the 1960s, this theory describes the movement of lithospheric plates. It explains Orogeny (mountain building at convergent boundaries), Seismicity, and Sea Floor Spreading at mid-oceanic ridges.<\/p>\n\n\n\n<p>182. An area will be described as urban if it has \u2014<\/p>\n\n\n\n<p>(A) High population (B) Has towns and cities (C) High proportion of non-agriculture pursuits (D) All the above<\/p>\n\n\n\n<p>Correct Answer: (C) High proportion of people in non-agriculture pursuits<\/p>\n\n\n\n<p>Explanation: According to the Census of India, a &#8220;Statutory Town&#8221; or &#8220;Census Town&#8221; must have a minimum population of 5,000, and at least 75% of the male main working population must be engaged in non-agricultural pursuits.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2014\"><\/span><strong>WBCS Preliminary Question \u2013 2014<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>53. El Nino refers to \u2014<\/p>\n\n\n\n<p>(A) Atmospheric (B) Environmental (C) Oceanic (D) Climatic phenomenon<\/p>\n\n\n\n<p>Correct Answer: (C) An Oceanic phenomenon<\/p>\n\n\n\n<p>Explanation: El Ni\u00f1o is the abnormal warming of surface waters in the eastern tropical Pacific Ocean. While it has major atmospheric impacts (Southern Oscillation), it is primarily defined as a periodic fluctuation in sea surface temperature.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2013\"><\/span><strong>WBCS Preliminary Question \u2013 2013<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>27. Seismograph is: \u2014<\/p>\n\n\n\n<p>(A) Instrument for clouds (B) Recording earthquake tremors (C) Measuring water depth (D) Recording air pressure<\/p>\n\n\n\n<p>Correct Answer: (B) An instrument for recording earthquake tremors<\/p>\n\n\n\n<p>Explanation: A seismograph records the P, S, and Surface waves of an earthquake. The record produced is called a Seismogram.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Important Data:<\/strong> Fathometer is used for water depth; Barometer for atmospheric pressure.<\/li>\n<\/ul>\n\n\n\n<p>45. Lines drawn joining places of equal dip angles (inclination) are known as \u2014<\/p>\n\n\n\n<p>(A) Isogonic (B) Isoclinic (C) Agonic (D) Isothermal<\/p>\n\n\n\n<p>Correct Answer: (B) Isoclinic lines<\/p>\n\n\n\n<p>Explanation: Isoclinic lines connect points with equal magnetic dip. Isogonic lines connect points with equal magnetic declination. Agonic lines connect points with zero declination.<\/p>\n\n\n\n<p>61. In terms of area India\u2019s rank in the world is \u2014<\/p>\n\n\n\n<p>(A) 5th (B) 7th (C) 10th (D) 12th<\/p>\n\n\n\n<p>Correct Answer: (B) 7th<\/p>\n\n\n\n<p>Explanation: The sequence by area is: Russia &gt; Canada &gt; USA &gt; China &gt; Brazil &gt; Australia &gt; India. India&#8217;s total area is 3,287,263 sq. km<\/p>\n\n\n\n<p>88. Part of earth where life exist is known as \u2014<\/p>\n\n\n\n<p>(A) Lithosphere (B) Hydrosphere (C) Atmosphere (D) Biosphere<\/p>\n\n\n\n<p>Correct Answer: (D) Biosphere<\/p>\n\n\n\n<p>Explanation: The Biosphere is the narrow zone of contact between the Lithosphere (land), Hydrosphere (water), and Atmosphere (air) where all living organisms exist.<\/p>\n\n\n\n<p>75. Endemic plants are those which grow in \u2014<\/p>\n\n\n\n<p>(A) Fresh water (B) Shady places (C) On other plants (D) Geographically limited areas<\/p>\n\n\n\n<p>Correct Answer: (D) Geographically limited areas<\/p>\n\n\n\n<p>Explanation: Endemism is the state of a species being unique to a defined geographic location, such as an island or a specific country. For example, the Western Ghats have many endemic plant species not found anywhere else.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2012\"><\/span><strong>WBCS Preliminary Question \u2013 2012<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>178. El Nino in the Pacific \u2014<\/p>\n\n\n\n<p>(A) Increases monsoon (B) Decreases monsoon (C) Increases cyclones (D) Decreases cyclones<\/p>\n\n\n\n<p>Correct Answer: (B) Decreases monsoon rainfall over India<\/p>\n\n\n\n<p>Explanation: El Ni\u00f1o shifts the warm water and rising air (low pressure) to the Central\/Eastern Pacific, weakening the trade winds. This results in suppressed rainfall or drought conditions during the Indian Summer Monsoon.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2011\"><\/span><strong>WBCS Preliminary Question \u2013 2011<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>197. The latitude of a place is expressed by its angular distance in relation to \u2014<\/p>\n\n\n\n<p>(A) South Pole (B) North Pole (C) Equator (D) Axis of the Earth<\/p>\n\n\n\n<p>Correct Answer: (C) Equator<\/p>\n\n\n\n<p>Explanation: Latitude is the angular distance of a point on the Earth&#8217;s surface, measured in degrees from the center of the Earth, north or south of the Equator 0^121. For his model of industrial location, Weber makes use of: \u2014<\/p>\n\n\n\n<p>(A) Isogons (B) Isophenes (C) Isodapanes (D) Isotachs<\/p>\n\n\n\n<p>Correct Answer: (C) Isodapanes<\/p>\n\n\n\n<p>Explanation: Alfred Weber\u2019s Theory of Industrial Location uses Isodapanes (lines of equal total transport cost). Isotims are lines of equal transport cost for a single commodity. This model identifies the &#8220;Least Cost Location&#8221; for industries.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2015-2\"><\/span><strong>WBCS Preliminary Question \u2013 2015<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>77. If there were no atmosphere, the earth would have been \u2014<\/p>\n\n\n\n<p>(A) Slightly hot (B) Slightly cold (C) Very hot (D) Very cold<\/p>\n\n\n\n<p>Correct Answer: (D) Very cold<\/p>\n\n\n\n<p>Explanation: Without an atmosphere, there would be no Greenhouse Effect to trap heat. Earth&#8217;s average temperature would drop to approximately $-18^\\circ\\text{C}$ (from the current $+15^\\circ\\text{C}$), making it a frozen, lifeless planet.<\/p>\n\n\n\n<p>86. Geographical concentration of industries generates \u2014<\/p>\n\n\n\n<p>(A) Horizontal linkage only (B) Vertical linkage only (C) Both vertical and horizontal (D) No linkage<\/p>\n\n\n\n<p>Correct Answer: (C) Both vertical and horizontal linkages<\/p>\n\n\n\n<p>Explanation: Industrial clusters (Agglomeration) lead to Vertical linkages (supply chains between raw materials and finished goods) and Horizontal linkages (shared infrastructure, labor pools, and specialized services).<\/p>\n\n\n\n<p>119. In which layer of the atmosphere does ozone act as a UV radiation shield? \u2014<\/p>\n\n\n\n<p>(A) Troposphere (B) Thermosphere (C) Stratosphere (D) Mesosphere<\/p>\n\n\n\n<p>Correct Answer: (C) Stratosphere<\/p>\n\n\n\n<p>Explanation: The &#8220;Ozonosphere&#8221; is located within the Stratosphere (approx. $15\\text{&#8211;}35 \\text{ km}$). It absorbs $97\\text{&#8211;}99\\%$ of the Sun&#8217;s medium-frequency ultraviolet light ($UV\\text{-}B$), which otherwise causes skin cancer and DNA damage.<\/p>\n\n\n\n<p>139. One of the characteristics of the atmosphere of prebiotic primitive earth was: \u2014<\/p>\n\n\n\n<p>(A) Absence of hydrogen (B) Absence of water vapour (C) Absence of nitrogen (D) Absence of oxygen<\/p>\n\n\n\n<p>Correct Answer: (D) Absence of oxygen<\/p>\n\n\n\n<p>Explanation: The primitive atmosphere was a &#8220;Reducing Atmosphere&#8221; consisting of Methane, Ammonia, Water Vapour, and Hydrogen. Free oxygen appeared much later through the process of photosynthesis by cyanobacteria.<\/p>\n\n\n\n<p>178. Theory of Plate Tectonics explains \u2014<\/p>\n\n\n\n<p>(A) Formation of Mountains (B) Sea floor spreading (C) Origin of earthquakes (D) All of the above<\/p>\n\n\n\n<p>Correct Answer: (D) All of the above<\/p>\n\n\n\n<p>Explanation: Proposed in the 1960s, this theory describes the movement of lithospheric plates. It explains Orogeny (mountain building at convergent boundaries), Seismicity, and Sea Floor Spreading at mid-oceanic ridges.<\/p>\n\n\n\n<p>182. An area will be described as urban if it has \u2014<\/p>\n\n\n\n<p>(A) High population (B) Has towns and cities (C) High proportion of non-agriculture pursuits (D) All the above<\/p>\n\n\n\n<p>Correct Answer: (C) High proportion of people in non-agriculture pursuits<\/p>\n\n\n\n<p>Explanation: According to the Census of India, a &#8220;Statutory Town&#8221; or &#8220;Census Town&#8221; must have a minimum population of $5,000$, and at least $75\\%$ of the male main working population must be engaged in non-agricultural pursuits.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2014-2\"><\/span><strong>WBCS Preliminary Question \u2013 2014<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>53. El Nino refers to \u2014<\/p>\n\n\n\n<p>(A) Atmospheric (B) Environmental (C) Oceanic (D) Climatic phenomenon<\/p>\n\n\n\n<p>Correct Answer: (C) An Oceanic phenomenon<\/p>\n\n\n\n<p>Explanation: El Ni\u00f1o is the abnormal warming of surface waters in the eastern tropical Pacific Ocean. While it has major atmospheric impacts (Southern Oscillation), it is primarily defined as a periodic fluctuation in sea surface temperature.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2013-2\"><\/span><strong>WBCS Preliminary Question \u2013 2013<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>27. Seismograph is: \u2014<\/p>\n\n\n\n<p>(A) Instrument for clouds (B) Recording earthquake tremors (C) Measuring water depth (D) Recording air pressure<\/p>\n\n\n\n<p>Correct Answer: (B) An instrument for recording earthquake tremors<\/p>\n\n\n\n<p>Explanation: A seismograph records the P, S, and Surface waves of an earthquake. The record produced is called a Seismogram.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Important Data:<\/strong> Fathometer is used for water depth; Barometer for atmospheric pressure.<\/li>\n<\/ul>\n\n\n\n<p>45. Lines drawn joining places of equal dip angles (inclination) are known as \u2014<\/p>\n\n\n\n<p>(A) Isogonic (B) Isoclinic (C) Agonic (D) Isothermal<\/p>\n\n\n\n<p>Correct Answer: (B) Isoclinic lines<\/p>\n\n\n\n<p>Explanation: Isoclinic lines connect points with equal magnetic dip. Isogonic lines connect points with equal magnetic declination. Agonic lines connect points with zero declination.<\/p>\n\n\n\n<p>61. In terms of area India\u2019s rank in the world is \u2014<\/p>\n\n\n\n<p>(A) 5th (B) 7th (C) 10th (D) 12th<\/p>\n\n\n\n<p>Correct Answer: (B) 7th<\/p>\n\n\n\n<p>Explanation: The sequence by area is: Russia &gt; Canada &gt; USA &gt; China &gt; Brazil &gt; Australia &gt; India. India&#8217;s total area is $3,287,263 \\text{ sq. km}$.<\/p>\n\n\n\n<p>88. Part of earth where life exist is known as \u2014<\/p>\n\n\n\n<p>(A) Lithosphere (B) Hydrosphere (C) Atmosphere (D) Biosphere<\/p>\n\n\n\n<p>Correct Answer: (D) Biosphere<\/p>\n\n\n\n<p>Explanation: The Biosphere is the narrow zone of contact between the Lithosphere (land), Hydrosphere (water), and Atmosphere (air) where all living organisms exist.<\/p>\n\n\n\n<p>75. Endemic plants are those which grow in \u2014<\/p>\n\n\n\n<p>(A) Fresh water (B) Shady places (C) On other plants (D) Geographically limited areas<\/p>\n\n\n\n<p>Correct Answer: (D) Geographically limited areas<\/p>\n\n\n\n<p>Explanation: Endemism is the state of a species being unique to a defined geographic location, such as an island or a specific country. For example, the Western Ghats have many endemic plant species not found anywhere else.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2012-2\"><\/span><strong>WBCS Preliminary Question \u2013 2012<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>178. El Nino in the Pacific \u2014<\/p>\n\n\n\n<p>(A) Increases monsoon (B) Decreases monsoon (C) Increases cyclones (D) Decreases cyclones<\/p>\n\n\n\n<p>Correct Answer: (B) Decreases monsoon rainfall over India<\/p>\n\n\n\n<p>Explanation: El Ni\u00f1o shifts the warm water and rising air (low pressure) to the Central\/Eastern Pacific, weakening the trade winds. This results in suppressed rainfall or drought conditions during the Indian Summer Monsoon.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2011-2\"><\/span><strong>WBCS Preliminary Question \u2013 2011<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>197. The latitude of a place is expressed by its angular distance in relation to \u2014<\/p>\n\n\n\n<p>(A) South Pole (B) North Pole (C) Equator (D) Axis of the Earth<\/p>\n\n\n\n<p>Correct Answer: (C) Equator<\/p>\n\n\n\n<p>Explanation: Latitude is the angular distance of a point on the Earth&#8217;s surface, measured in degrees from the center of the Earth, north or south of the Equator ($0^\\circ$).<\/p>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2010\"><\/span><strong>WBCS Preliminary Question \u2013 2010<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>84. Tsunamis are generated by \u2014<\/p>\n\n\n\n<p>(A) Under-sea plate movements (B) Undersea volcanism (C) Tidal change (D) None of the above<\/p>\n\n\n\n<p>Correct Answer: (A) Under-sea plate movements<\/p>\n\n\n\n<p>Explanation: Most tsunamis are caused by vertical displacement of the seafloor during underwater earthquakes at subduction zones. This moves the entire water column, creating massive waves that travel long distances.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2008\"><\/span><strong>WBCS Preliminary Question \u2013 2008<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>168. The tsunami of Dec 2004 originated from \u2014<\/p>\n\n\n\n<p>(A) Subduction of Indian plate under Myanmar plate (B) Subduction of Myanmar under Indian (C) Trench formation (D) Hawaii<\/p>\n\n\n\n<p>Correct Answer: (A) Subduction of Indian plate under the Myanmar plate<\/p>\n\n\n\n<p>Explanation: This $9.1$ magnitude earthquake occurred off the coast of Sumatra. The Indian Plate subducted beneath the Burma Microplate (part of the Eurasian Plate), causing a massive uplift of the seafloor.<\/p>\n\n\n\n<p>180. Lignite is a type of \u2014<\/p>\n\n\n\n<p>(A) Iron ore (B) Copper (C) Coal (D) Limestone<\/p>\n\n\n\n<p>Correct Answer: (C) Coal<\/p>\n\n\n\n<p>Explanation: Lignite is &#8220;Brown Coal,&#8221; containing about 40-55% carbon. It is considered the lowest rank of coal. In India, the largest lignite deposits are found in Neyveli, Tamil Nadu.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2007\"><\/span><strong>WBCS Preliminary Question \u2013 2007<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>184. When a body is raised upwards from the surface of the earth, its weight shall \u2014<\/p>\n\n\n\n<p>(A) Increase (B) Remain same (C) Decrease (D) Fluctuate<\/p>\n\n\n\n<p>Correct Answer: (C) Decrease<\/p>\n\n\n\n<p>Explanation: Weight (W = mg) depends on the acceleration due to gravity (g). The value of $g$ decreases as we move away from the Earth&#8217;s center (altitude) and also as we go deeper into the Earth.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2005\"><\/span><strong>WBCS Preliminary Question \u2013 2005<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>106. The Deccan Lava region was formed during \u2014<\/p>\n\n\n\n<p>(a) Cretaceous (b) Jurassic (c) Triassic (d) Cambrian<\/p>\n\n\n\n<p>Correct Answer: (a) Cretaceous period<\/p>\n\n\n\n<p>Explanation: The Deccan Traps were formed by massive volcanic eruptions (fissure eruptions) at the end of the Cretaceous period (about 6 million years ago. This basaltic lava created the &#8220;Regur&#8221; or Black Soil of India.<\/p>\n\n\n\n<p>161. Titan is \u2014<\/p>\n\n\n\n<p>(a) Saturn\u2019s largest moon (b) Passenger liner (c) Ancient city (d) Metallic element<\/p>\n\n\n\n<p>Correct Answer: (a) Saturn\u2019s largest moon<\/p>\n\n\n\n<p>Explanation: Titan is the second-largest moon in the solar system (after Ganymede). It is the only moon known to have a dense atmosphere and stable bodies of liquid (methane\/ethane) on its surface.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2004\"><\/span><strong>WBCS Preliminary Question \u2013 2004<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>115. The height of the peak of the world is \u2014<\/p>\n\n\n\n<p>(A) 8,848m (B) 8,567m (C) 8,150m (D) 7,990m<\/p>\n\n\n\n<p>Correct Answer: (A) 8,848m<\/p>\n\n\n\n<p>Explanation: Mount Everest is the highest peak. Recent measurements by Nepal and China have updated the height slightly to 8,848.86m. It is located in the Mahalangur Himal sub-range of the Himalayas.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2003\"><\/span><strong>WBCS Preliminary Question \u2013 2003<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>141. In areal extent, India\u2019s place among the countries of the world is \u2014<\/p>\n\n\n\n<p>(A) 2nd (B) 4th (C) 5th (D) 7th<\/p>\n\n\n\n<p>Correct Answer: (D) Seventh<\/p>\n\n\n\n<p>Explanation: (Same as Question 61 from 2013). India follows Australia and precedes Argentina in size.<\/p>\n\n\n\n<p>173. Weight of a man is more \u2014<\/p>\n\n\n\n<p>(A) On equator (B) At poles (C) At centre (D) In space<\/p>\n\n\n\n<p>Correct Answer: (B) At poles<\/p>\n\n\n\n<p>Explanation: Earth is an oblate spheroid (bulged at the equator). The distance from the center is least at the poles, making gravity (g )strongest there. Therefore, weight is maximum at the poles and minimum at the equator.<\/p>\n\n\n\n<p>193. The lowermost layer of the atmosphere is \u2014<\/p>\n\n\n\n<p>(A) Troposphere (B) Stratosphere (C) Ionosphere (D) None<\/p>\n\n\n\n<p>Correct Answer: (A) Troposphere<\/p>\n\n\n\n<p>Explanation: The Troposphere contains roughly 80% of the atmosphere&#8217;s mass and almost all its water vapour. All weather phenomena (clouds, rain, storms) occur in this layer.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2002\"><\/span><strong>WBCS Preliminary Question \u2013 2002<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>180. Which one of the following is an estuarine delta? \u2014<\/p>\n\n\n\n<p>(A) Rhine (B) Mississippi (C) Ganga (D) Volga<\/p>\n\n\n\n<p>Correct Answer: (A) Rhine delta<\/p>\n\n\n\n<p>Explanation: An estuarine delta forms when the mouth of a river is submerged. The Rhine and the Seine are examples. Mississippi is a &#8220;Bird-foot&#8221; delta, and Ganga is an &#8220;Arcuate&#8221; delta.<\/p>\n\n\n\n<p>140. What is the most widely cultivated fruit in world? \u2014<\/p>\n\n\n\n<p>(A) Banana (B) Apple (C) Guava (D) Grapes<\/p>\n\n\n\n<p>Correct Answer: (A) Banana<\/p>\n\n\n\n<p>Explanation: By volume of production and global consumption, Bananas are the most widely cultivated fruit. India is the largest producer of bananas in the world.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2001\"><\/span><strong>WBCS Preliminary Question \u2013 2001<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>44. Around the solstices twilight lasts from sunset to sunrise in \u2014<\/p>\n\n\n\n<p>(A) Equatorial (B) Tropical (C) High latitudes (D) Mid latitudes<\/p>\n\n\n\n<p>Correct Answer: (C) High latitudes<\/p>\n\n\n\n<p>Explanation: In high latitudes (Arctic\/Antarctic circles), the sun remains just below the horizon during summer solstice nights, leading to continuous twilight (Midnight Sun phenomenon).<\/p>\n\n\n\n<p>87. There is no local time at \u2014<\/p>\n\n\n\n<p>(A) London (B) North and South Poles (C) IDL (D) Magnetic Poles<\/p>\n\n\n\n<p>Correct Answer: (B) North and South Poles<\/p>\n\n\n\n<p>Explanation: At the poles, all lines of longitude converge. Since time zones are based on longitude, &#8220;time&#8221; becomes arbitrary. Research stations at the poles usually use the time of their home country or supply hub.<\/p>\n\n\n\n<p>168. Term for sandy deserts with characteristic sand dune landscape? \u2014<\/p>\n\n\n\n<p>(A) Reg (B) Erg (C) Hamada (D) Bad land<\/p>\n\n\n\n<p>Correct Answer: (B) Erg<\/p>\n\n\n\n<p>Explanation: An Erg is a &#8220;sand sea.&#8221; A Reg is a rocky\/stony desert surface (desert pavement), and a Hamada is a high, rocky plateau desert.<\/p>\n\n\n\n<p>170. The Earth\u2019s magnetic field \u2014<\/p>\n\n\n\n<p>(A) Never changes (B) Has reversed itself (C) Exact centre (D) Permanent magnet<\/p>\n\n\n\n<p>Correct Answer: (B) Has reversed itself many times<\/p>\n\n\n\n<p>Explanation: This is called &#8220;Geomagnetic Reversal.&#8221; Evidence from mid-oceanic ridges shows that the North and South magnetic poles swap places every few hundred thousand years. It is generated by the Dynamo effect in the outer core.<\/p>\n\n\n\n<hr class=\"wp-block-separator has-alpha-channel-opacity\"\/>\n\n\n\n<h2 class=\"wp-block-heading\"><span class=\"ez-toc-section\" id=\"WBCS_Preliminary_Question_%E2%80%93_2000\"><\/span><strong>WBCS Preliminary Question \u2013 2000<\/strong><span class=\"ez-toc-section-end\"><\/span><\/h2>\n\n\n\n<p>97. Period of revolution is exactly 12 years for \u2014<\/p>\n\n\n\n<p>(A) Mars (B) Jupiter (C) Saturn (D) Uranus<\/p>\n\n\n\n<p>Correct Answer: (B) Jupiter<\/p>\n\n\n\n<p>Explanation: Jupiter takes $11.86$ Earth years to complete one orbit around the sun.<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>Data:<\/strong> Saturn takes 29.5 years; Uranus 84 years; Mars 687 days.<\/li>\n<\/ul>\n\n\n\n<p>99. Lines joining places with the same total transport cost are called \u2014<\/p>\n\n\n\n<p>(A) Isotims (B) Isodapane (C) Isochrones (D) Isopheths<\/p>\n\n\n\n<p>Correct Answer: (B) Isodapane<\/p>\n\n\n\n<p>Explanation: (Repeat concept from 2016). Isochrones join places with equal travel time from a specific point.<\/p>\n\n\n\n<p>39. Most fossils are found in \u2014<\/p>\n\n\n\n<p>(A) Granite (B) Sedimentary (C) Black soil (D) Lava<\/p>\n\n\n\n<p>Correct Answer: (B) Sedimentary rocks<\/p>\n\n\n\n<p>Explanation: Fossils are preserved in layers of sediment (sand, mud) that harden over time. Igneous rocks (Granite, Lava) are too hot during formation, and Metamorphic rocks undergo too much pressure to preserve fossils.<\/p>\n\n\n\n<p>116. Laterite soils are formed due to \u2014<\/p>\n\n\n\n<p>(A) Removal of silicates, lime and organic matter (B) Decaying organic matter (C) Disintegration of lava (D) Exfoliation<\/p>\n\n\n\n<p>Correct Answer: (A) Removal of silicates, lime and organic matter<\/p>\n\n\n\n<p>Explanation: Laterite soil is formed by Leaching in areas of high temperature and high rainfall. Silica is washed away, leaving behind iron and aluminum oxides, making the soil acidic and reddish.<\/p>\n\n\n\n<p><\/p>\n","protected":false},"excerpt":{"rendered":"<p>WBCS Preliminary Question \u2013 2021 73. The ratio of the diameters of moon and earth is nearly \u2014 (A) 1 : 2 (B) 1 : 5 (C) 1 : 4 (D) 1 : 8 Correct Answer: (C) 1 : 4 Explanation: The diameter of the Moon is approximately 3,474 km while Earth&#8217;s diameter is about &#8230; <a title=\"Physical and World Geography: WBCS Prelims PYQs\" class=\"read-more\" href=\"https:\/\/earningvista.com\/exam\/geography\/physical-world-geography\/physical-and-world-geography-wbcs-prelims-pyqs\/\" aria-label=\"Read more about Physical and World Geography: WBCS Prelims PYQs\">Read more<\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[90],"tags":[],"class_list":["post-852","post","type-post","status-publish","format-standard","hentry","category-physical-world-geography"],"_links":{"self":[{"href":"https:\/\/earningvista.com\/exam\/wp-json\/wp\/v2\/posts\/852","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/earningvista.com\/exam\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/earningvista.com\/exam\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/earningvista.com\/exam\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/earningvista.com\/exam\/wp-json\/wp\/v2\/comments?post=852"}],"version-history":[{"count":4,"href":"https:\/\/earningvista.com\/exam\/wp-json\/wp\/v2\/posts\/852\/revisions"}],"predecessor-version":[{"id":862,"href":"https:\/\/earningvista.com\/exam\/wp-json\/wp\/v2\/posts\/852\/revisions\/862"}],"wp:attachment":[{"href":"https:\/\/earningvista.com\/exam\/wp-json\/wp\/v2\/media?parent=852"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/earningvista.com\/exam\/wp-json\/wp\/v2\/categories?post=852"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/earningvista.com\/exam\/wp-json\/wp\/v2\/tags?post=852"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}