{"id":150457,"date":"2024-10-09T04:44:12","date_gmt":"2024-10-09T04:44:12","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=150457"},"modified":"2024-10-09T04:44:15","modified_gmt":"2024-10-09T04:44:15","slug":"which-of-the-following-is-an-example-of-a-double-replacement-reaction","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/10\/09\/which-of-the-following-is-an-example-of-a-double-replacement-reaction\/","title":{"rendered":"Which of the following is an example of a double replacement reaction"},"content":{"rendered":"\n

Which of the following is an example of a double replacement reaction?
A. 3Fe + 2O2 \u2192 Fe3O4
B. BaCl2 + K2CO3 \u2192 BaCO3 + 2KCl
C. NiCO3 \u2192 NiO + CO2
D. Cl2 + 2NaBr \u2192 2NaCl + Br2<\/p>\n\n\n\n

The Correct Answer and Explanation is :<\/strong><\/mark><\/p>\n\n\n\n

The correct answer is B. BaCl2 + K2CO3 \u2192 BaCO3 + 2KCl<\/strong>, which is an example of a double replacement reaction<\/strong>.<\/p>\n\n\n\n

Explanation:<\/h3>\n\n\n\n

A double replacement reaction<\/strong> (also known as a double displacement or metathesis reaction) occurs when parts of two compounds switch places to form two new compounds. The general form of this type of reaction is:<\/p>\n\n\n\n

AB + CD \u2192 AD + CB<\/strong><\/p>\n\n\n\n

Here, the positive ion (cation) of one compound combines with the negative ion (anion) of another compound, and vice versa.<\/p>\n\n\n\n

Breaking down the reaction:<\/h4>\n\n\n\n
    \n
  • BaCl2 (Barium chloride)<\/strong> is composed of Ba\u00b2\u207a (barium ion) and Cl\u207b (chloride ions).<\/li>\n\n\n\n
  • K2CO3 (Potassium carbonate)<\/strong> is composed of K\u207a (potassium ions) and CO3\u00b2\u207b (carbonate ion).<\/li>\n<\/ul>\n\n\n\n

    In this reaction:<\/p>\n\n\n\n

      \n
    • The Ba\u00b2\u207a cation from BaCl2 pairs with the CO3\u00b2\u207b anion from K2CO3 to form BaCO3 (Barium carbonate)<\/strong>.<\/li>\n\n\n\n
    • The K\u207a cations from K2CO3 pair with the Cl\u207b anions from BaCl2 to form 2KCl (Potassium chloride)<\/strong>.<\/li>\n<\/ul>\n\n\n\n

      This swapping of ions is characteristic of a double replacement reaction.<\/p>\n\n\n\n

      Why Other Reactions Do Not Fit:<\/h4>\n\n\n\n
        \n
      • Option A (3Fe + 2O2 \u2192 Fe3O4):<\/strong> This is a synthesis reaction<\/strong>, where iron (Fe) reacts with oxygen (O2) to form iron oxide (Fe3O4).<\/li>\n\n\n\n
      • Option C (NiCO3 \u2192 NiO + CO2):<\/strong> This is a decomposition reaction<\/strong>, where nickel carbonate (NiCO3) breaks down into nickel oxide (NiO) and carbon dioxide (CO2).<\/li>\n\n\n\n
      • Option D (Cl2 + 2NaBr \u2192 2NaCl + Br2):<\/strong> This is a single replacement reaction<\/strong>, where chlorine (Cl2) replaces bromine (Br) in sodium bromide (NaBr) to form sodium chloride (NaCl) and bromine (Br2).<\/li>\n<\/ul>\n\n\n\n

        Thus, Option B<\/strong> clearly exemplifies a double replacement reaction, as two ionic compounds exchange ions to produce two new ionic compounds.<\/p>\n","protected":false},"excerpt":{"rendered":"

        Which of the following is an example of a double replacement reaction?A. 3Fe + 2O2 \u2192 Fe3O4B. BaCl2 + K2CO3 \u2192 BaCO3 + 2KClC. NiCO3 \u2192 NiO + CO2D. Cl2 + 2NaBr \u2192 2NaCl + Br2 The Correct Answer and Explanation is : The correct answer is B. BaCl2 + K2CO3 \u2192 BaCO3 + 2KCl, […]<\/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-150457","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/150457","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=150457"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/150457\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=150457"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=150457"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=150457"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}