{"id":2872,"date":"2026-04-22T21:21:06","date_gmt":"2026-04-22T15:51:06","guid":{"rendered":"https:\/\/lotusarise.com\/qna\/?p=2872"},"modified":"2026-04-22T21:21:08","modified_gmt":"2026-04-22T15:51:08","slug":"consider-the-following-statements-19","status":"publish","type":"post","link":"https:\/\/lotusarise.com\/qna\/upsc\/prelims\/consider-the-following-statements-19","title":{"rendered":"Consider the following statements:\u00a0\u00a0"},"content":{"rendered":"\n<p class=\"wp-block-paragraph\"><strong>Statement I:<\/strong>&nbsp;Studies indicate that carbon dioxide emissions from cement industry account for more than 5% of global carbon emissions.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Statement II:<\/strong>&nbsp;Silica-bearing clay is mixed with limestone while manufacturing cement.&nbsp;&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\"><strong>Statement III:<\/strong>&nbsp;Limestone is converted into lime during clinker production for cement manufacturing.&nbsp;<\/p>\n\n\n\n<p class=\"wp-block-paragraph\">Which one of the following is&nbsp;<strong>correct&nbsp;<\/strong>with respect to the above statements?&nbsp;&nbsp;&nbsp;<\/p>\n\n\n\n<ul class=\"wp-block-list mcq\">\n<li>Both Statement II and Statement III are correct and both of them explain Statement I\u00a0\u00a0\u00a0<\/li>\n\n\n\n<li><strong>Both Statement II and Statement III are correct but only one of them explains Statement I\u00a0\u00a0\u00a0<\/strong><\/li>\n\n\n\n<li>Only one of the Statements II and Statement\u00a0 III is correct and that explain statement t I\u00a0\u00a0\u00a0<\/li>\n\n\n\n<li>Neither Statement II nor Statement III is correct\u00a0<\/li>\n<\/ul>\n\n\n\n<blockquote class=\"wp-block-quote is-layout-flow wp-block-quote-is-layout-flow\">\n<p class=\"wp-block-paragraph\">Answer:&nbsp;<strong>(b) Both Statement II and Statement III are correct but only one of them explains Statement I&nbsp;&nbsp;&nbsp;<\/strong><\/p>\n<\/blockquote>\n\n\n\n<ul class=\"wp-block-list\">\n<li>The\u00a0<strong>cement industry is a significant source of carbon dioxide emissions due to both the chemical reactions involved in producing clinker\u00a0<\/strong>(the main ingredient of cement) and the burning of fossil fuels to power the production process. Specifically,\u00a0<strong>calcining limestone (a primary ingredient) to produce lime (CaO) releases CO2<\/strong>, and burning fossil fuels to heat the kilns also contributes to emissions.<\/li>\n\n\n\n<li>The cement industry is a major global polluter, currently accounting for approximately\u00a0<strong>6.5% to 8% of total global CO2 emissions<\/strong>. If the sector were a country, it would be the\u00a0<strong>third or fourth largest emitter<\/strong>\u00a0in the world.\n<ul class=\"wp-block-list\">\n<li>Global cement manufacturing produced\u00a0<strong>1.6 billion metric tonnes of CO2 in 2022<\/strong>, the latest year for which there are figures \u2013 that\u2019s about\u00a0<strong>8% of the world\u2019s total CO2 emissions.<\/strong><\/li>\n<\/ul>\n<\/li>\n\n\n\n<li>Silica-bearing clay is mixed with limestone while manufacturing cement.\u00a0<strong>Cement production involves mixing limestone with other materials like clay, which contains silica, along with other minerals<\/strong>. These materials are then processed into clinker, a key component of cement.<\/li>\n\n\n\n<li>In the process of making\u00a0<strong>cement clinker, limestone, which is primarily calcium carbonate (CaCO3), is heated to high temperatures (1450\u00b0C or 2640\u00b0F) in a kiln<\/strong>. This process, called\u00a0<strong>calcination<\/strong>, decomposes the limestone into calcium oxide (CaO), commonly known as\u00a0<strong>lime, and carbon dioxide (CO2).<\/strong>\u00a0The lime then reacts with other raw materials like clay and silica to form the clinker, which is the main ingredient in cement.<\/li>\n<\/ul>\n","protected":false},"excerpt":{"rendered":"<p>Statement I:&nbsp;Studies indicate that carbon dioxide emissions from cement industry account for more than 5% of global carbon emissions.&nbsp;&nbsp; Statement II:&nbsp;Silica-bearing clay is mixed with limestone while manufacturing cement.&nbsp;&nbsp; Statement III:&nbsp;Limestone is converted into lime during clinker production for cement manufacturing.&nbsp; Which one of the following is&nbsp;correct&nbsp;with respect to the above statements?&nbsp;&nbsp;&nbsp; Answer:&nbsp;(b) Both Statement&#8230;<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"open","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"_acf_changed":false,"_kad_blocks_custom_css":"","_kad_blocks_head_custom_js":"","_kad_blocks_body_custom_js":"","_kad_blocks_footer_custom_js":"","_kad_post_transparent":"","_kad_post_title":"","_kad_post_layout":"","_kad_post_sidebar_id":"","_kad_post_content_style":"","_kad_post_vertical_padding":"","_kad_post_feature":"","_kad_post_feature_position":"","_kad_post_header":false,"_kad_post_footer":false,"_kad_post_classname":"","footnotes":""},"categories":[3,1],"tags":[44],"years":[63],"class_list":["post-2872","post","type-post","status-publish","format-standard","hentry","category-prelims","category-upsc","tag-science-and-tech","years-63"],"acf":[],"taxonomy_info":{"category":[{"value":3,"label":"Prelims"},{"value":1,"label":"UPSC"}],"post_tag":[{"value":44,"label":"Science and Tech"}],"years":[{"value":63,"label":"2025"}]},"featured_image_src_large":false,"author_info":{"display_name":"LotusArise","author_link":"https:\/\/lotusarise.com\/qna\/author\/team-lotusarise"},"comment_info":0,"category_info":[{"term_id":3,"name":"Prelims","slug":"prelims","term_group":0,"term_taxonomy_id":3,"taxonomy":"category","description":"","parent":1,"count":1251,"filter":"raw","cat_ID":3,"category_count":1251,"category_description":"","cat_name":"Prelims","category_nicename":"prelims","category_parent":1},{"term_id":1,"name":"UPSC","slug":"upsc","term_group":0,"term_taxonomy_id":1,"taxonomy":"category","description":"","parent":0,"count":1269,"filter":"raw","cat_ID":1,"category_count":1269,"category_description":"","cat_name":"UPSC","category_nicename":"upsc","category_parent":0}],"tag_info":[{"term_id":44,"name":"Science and Tech","slug":"science-and-tech","term_group":0,"term_taxonomy_id":44,"taxonomy":"post_tag","description":"","parent":0,"count":167,"filter":"raw"}],"_links":{"self":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts\/2872","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/comments?post=2872"}],"version-history":[{"count":0,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/posts\/2872\/revisions"}],"wp:attachment":[{"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/media?parent=2872"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/categories?post=2872"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/tags?post=2872"},{"taxonomy":"years","embeddable":true,"href":"https:\/\/lotusarise.com\/qna\/wp-json\/wp\/v2\/years?post=2872"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}