{"id":229515,"date":"2025-06-08T08:55:41","date_gmt":"2025-06-08T08:55:41","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=229515"},"modified":"2025-06-08T08:55:43","modified_gmt":"2025-06-08T08:55:43","slug":"classify-each-of-the-following-as-a-pure-substance-or-a-mixture-2","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2025\/06\/08\/classify-each-of-the-following-as-a-pure-substance-or-a-mixture-2\/","title":{"rendered":"Classify each of the following as a pure substance or a mixture."},"content":{"rendered":"\n<p>Classify each of the following as a pure substance or a mixture. If a mixture, indicate whether it is homogeneous or heterogeneous: (a) air, (b) tomato juice, (c) iodine crystals, (d) sand.<\/p>\n\n\n\n<p><strong><mark style=\"background-color:rgba(0, 0, 0, 0)\" class=\"has-inline-color has-ast-global-color-1-color\">The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n<h6 class=\"wp-block-heading\">ChatGPT said:<\/h6>\n\n\n\n<p>Here are the classifications:<\/p>\n\n\n\n<ul class=\"wp-block-list\">\n<li><strong>(a) Air<\/strong> \u2013 <em>Mixture (Homogeneous)<\/em><\/li>\n\n\n\n<li><strong>(b) Tomato juice<\/strong> \u2013 <em>Mixture (Heterogeneous)<\/em><\/li>\n\n\n\n<li><strong>(c) Iodine crystals<\/strong> \u2013 <em>Pure substance<\/em><\/li>\n\n\n\n<li><strong>(d) Sand<\/strong> \u2013 <em>Mixture (Heterogeneous)<\/em><\/li>\n<\/ul>\n\n\n\n<h3 class=\"wp-block-heading\">Explanation <\/h3>\n\n\n\n<p>Matter can be broadly classified into <strong>pure substances<\/strong> and <strong>mixtures<\/strong>. A <em>pure substance<\/em> is composed of only one type of particle and has a fixed composition and definite properties. It can be an <strong>element<\/strong> (like iodine) or a <strong>compound<\/strong> (like water). In contrast, a <em>mixture<\/em> contains two or more substances physically combined and can vary in composition.<\/p>\n\n\n\n<p><strong>Air<\/strong> is a <em>homogeneous mixture<\/em>. It is composed of nitrogen, oxygen, carbon dioxide, and trace gases, all uniformly mixed. Even though it looks like a single substance, it&#8217;s actually a blend of different gases, making it a mixture. Since the composition is uniform throughout, it&#8217;s classified as homogeneous.<\/p>\n\n\n\n<p><strong>Tomato juice<\/strong> is a <em>heterogeneous mixture<\/em>. While it might appear uniform at a glance, it contains suspended solids such as pulp and seeds. These particles are not evenly distributed and can settle over time, which breaks the uniformity of the mixture. Thus, tomato juice is heterogeneous.<\/p>\n\n\n\n<p><strong>Iodine crystals<\/strong> are a <em>pure substance<\/em>. Iodine is a chemical element (symbol I), and its crystals consist entirely of iodine molecules. The composition is consistent throughout, without any physical blending of different substances, which classifies it as a pure substance.<\/p>\n\n\n\n<p><strong>Sand<\/strong> is a <em>heterogeneous mixture<\/em>. While it may look uniform in color or texture, it typically consists of particles of different minerals and materials, such as quartz, feldspar, and organic matter. These are not uniformly mixed at the molecular level, and differences can be observed even by the naked eye, making sand a heterogeneous mixture.<\/p>\n\n\n\n<p>In conclusion, recognizing whether a sample is a pure substance or a mixture\u2014and if a mixture, whether it&#8217;s homogeneous or heterogeneous\u2014requires examining its composition and the uniformity of its components.<\/p>\n\n\n\n<figure class=\"wp-block-image size-full\"><img decoding=\"async\" src=\"https:\/\/learnexams.com\/blog\/wp-content\/uploads\/2025\/06\/learnexams-banner8-136.jpeg\" alt=\"\" class=\"wp-image-229516\"\/><\/figure>\n","protected":false},"excerpt":{"rendered":"<p>Classify each of the following as a pure substance or a mixture. If a mixture, indicate whether it is homogeneous or heterogeneous: (a) air, (b) tomato juice, (c) iodine crystals, (d) sand. The Correct Answer and Explanation is: ChatGPT said: Here are the classifications: Explanation Matter can be broadly classified into pure substances and mixtures. [&hellip;]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","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":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"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":""},"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":[25],"tags":[],"class_list":["post-229515","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/229515","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=229515"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/229515\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=229515"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=229515"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=229515"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}