A substance has a variable composition. Choose the appropriate classification from the response list below:<\/p>\n\n\n\n
a) could be an element or a compound<\/p>\n\n\n\n
b) could be an element but not a compound<\/p>\n\n\n\n
c) could be a compound but not an element<\/p>\n\n\n\n
d) could not be an element nor a compound<\/p>\n\n\n\n
The correct answer and explanation is :<\/strong><\/mark><\/p>\n\n\n\n The correct answer is:<\/p>\n\n\n\n d) could not be an element nor a compound.<\/strong><\/p>\n\n\n\n A substance with a variable composition cannot be classified as an element or a compound. To understand why, let\u2019s break down the definitions of these terms.<\/p>\n\n\n\n For example, a mixture<\/strong> such as alloys<\/strong> (e.g., bronze or steel) has a variable composition of metals, and its properties depend on the proportions of the metals involved. Similarly, a solution<\/strong> (such as saltwater) can have different concentrations of solute depending on how much salt is dissolved in the water. Because the composition in mixtures is not fixed, they cannot be considered elements or compounds.<\/p>\n\n\n\n Thus, a substance with a variable composition does not fit the strict definitions of either an element or a compound. Therefore, option (d)<\/strong> is the correct choice.<\/p>\n","protected":false},"excerpt":{"rendered":" A substance has a variable composition. Choose the appropriate classification from the response list below: a) could be an element or a compound b) could be an element but not a compound c) could be a compound but not an element d) could not be an element nor a compound The correct answer and explanation […]<\/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-209291","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/209291","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=209291"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/209291\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=209291"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=209291"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=209291"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}Explanation:<\/h3>\n\n\n\n
\n
An element is a pure substance that consists of only one type of atom, characterized by a specific number of protons in its nucleus. Elements have a fixed, unchanging composition because they consist of only one type of atom. Examples include oxygen (O), hydrogen (H), and iron (Fe). The composition of an element is constant, meaning it does not vary.<\/li>\n\n\n\n
A compound is a substance composed of two or more different types of atoms chemically bonded together. Compounds have a fixed, definite composition. For example, water (H\u2082O) is a compound made of hydrogen and oxygen atoms in a fixed 2:1 ratio. Similar to elements, compounds also have a specific and predictable composition that does not vary.<\/li>\n\n\n\n
When a substance has a variable composition, it means that the relative proportions of the different components can change. This is characteristic of mixtures<\/strong>, not pure substances like elements or compounds. Mixtures can either be homogeneous (e.g., air) or heterogeneous (e.g., sand and iron filings), where the composition can vary depending on the sample.<\/li>\n<\/ol>\n\n\n\n