{"id":89512,"date":"2025-06-01T10:06:06","date_gmt":"2025-06-01T10:06:06","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=89512"},"modified":"2025-06-01T10:06:06","modified_gmt":"2025-06-01T10:06:06","slug":"when-an-iron-nail-is-dipped-in-a-solution-of-copper-sulphate-the-iron","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/when-an-iron-nail-is-dipped-in-a-solution-of-copper-sulphate-the-iron\/","title":{"rendered":"When an iron nail is dipped in a solution of copper sulphate, the iron"},"content":{"rendered":"

When an iron nail is dipped in a solution of copper sulphate, the iron nail becomes brownish in colour and the blue colour of copper sulphate solution fades after some time. The reaction is an example of chemical<\/p>\n

[amp_mcq option1=”combination” option2=”decomposition” option3=”displacement” option4=”double displacement” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2012<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
When an iron nail is dipped in a solution of copper sulphate (CuSO4), a chemical reaction occurs. Iron (Fe) is more reactive than copper (Cu), so it displaces copper from the copper sulphate solution. The reaction is: Fe (s) + CuSO4 (aq) \u2192 FeSO4 (aq) + Cu (s). This results in a brownish deposit of copper on the iron nail and the blue colour of the copper sulphate solution fading as iron sulphate (FeSO4), which is light green, is formed.<\/section>\n
This type of reaction, where a more reactive element displaces a less reactive element from its compound, is called a displacement reaction.<\/section>\n
Combination reactions involve two or more substances combining to form a single product. Decomposition reactions involve a single compound breaking down into two or more simpler substances. Double displacement reactions involve the exchange of ions between two compounds.<\/section>\n","protected":false},"excerpt":{"rendered":"

When an iron nail is dipped in a solution of copper sulphate, the iron nail becomes brownish in colour and the blue colour of copper sulphate solution fades after some time. The reaction is an example of chemical [amp_mcq option1=”combination” option2=”decomposition” option3=”displacement” option4=”double displacement” correct=”option3″] This question was previously asked in UPSC CAPF – 2012 … <\/p>\n

Detailed SolutionWhen an iron nail is dipped in a solution of copper sulphate, the iron<\/span><\/a><\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"open","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[1085],"tags":[1116,1096,1155],"class_list":["post-89512","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1116","tag-chemistry","tag-physical-and-chemical-changes-solution","no-featured-image-padding"],"yoast_head":"\nWhen an iron nail is dipped in a solution of copper sulphate, the iron<\/title>\n<meta name=\"description\" content=\"When an iron nail is dipped in a solution of copper sulphate (CuSO4), a chemical reaction occurs. Iron (Fe) is more reactive than copper (Cu), so it displaces copper from the copper sulphate solution. The reaction is: Fe (s) + CuSO4 (aq) \u2192 FeSO4 (aq) + Cu (s). This results in a brownish deposit of copper on the iron nail and the blue colour of the copper sulphate solution fading as iron sulphate (FeSO4), which is light green, is formed. This type of reaction, where a more reactive element displaces a less reactive element from its compound, is called a displacement reaction.\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/exam.pscnotes.com\/mcq\/when-an-iron-nail-is-dipped-in-a-solution-of-copper-sulphate-the-iron\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"When an iron nail is dipped in a solution of copper sulphate, the iron\" \/>\n<meta property=\"og:description\" content=\"When an iron nail is dipped in a solution of copper sulphate (CuSO4), a chemical reaction occurs. Iron (Fe) is more reactive than copper (Cu), so it displaces copper from the copper sulphate solution. The reaction is: Fe (s) + CuSO4 (aq) \u2192 FeSO4 (aq) + Cu (s). This results in a brownish deposit of copper on the iron nail and the blue colour of the copper sulphate solution fading as iron sulphate (FeSO4), which is light green, is formed. This type of reaction, where a more reactive element displaces a less reactive element from its compound, is called a displacement reaction.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/when-an-iron-nail-is-dipped-in-a-solution-of-copper-sulphate-the-iron\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:06:06+00:00\" \/>\n<meta name=\"author\" content=\"rawan239\" \/>\n<meta name=\"twitter:card\" content=\"summary_large_image\" \/>\n<meta name=\"twitter:label1\" content=\"Written by\" \/>\n\t<meta name=\"twitter:data1\" content=\"rawan239\" \/>\n\t<meta name=\"twitter:label2\" content=\"Est. reading time\" \/>\n\t<meta name=\"twitter:data2\" content=\"1 minute\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"When an iron nail is dipped in a solution of copper sulphate, the iron","description":"When an iron nail is dipped in a solution of copper sulphate (CuSO4), a chemical reaction occurs. Iron (Fe) is more reactive than copper (Cu), so it displaces copper from the copper sulphate solution. The reaction is: Fe (s) + CuSO4 (aq) \u2192 FeSO4 (aq) + Cu (s). This results in a brownish deposit of copper on the iron nail and the blue colour of the copper sulphate solution fading as iron sulphate (FeSO4), which is light green, is formed. This type of reaction, where a more reactive element displaces a less reactive element from its compound, is called a displacement reaction.","robots":{"index":"index","follow":"follow","max-snippet":"max-snippet:-1","max-image-preview":"max-image-preview:large","max-video-preview":"max-video-preview:-1"},"canonical":"https:\/\/exam.pscnotes.com\/mcq\/when-an-iron-nail-is-dipped-in-a-solution-of-copper-sulphate-the-iron\/","og_locale":"en_US","og_type":"article","og_title":"When an iron nail is dipped in a solution of copper sulphate, the iron","og_description":"When an iron nail is dipped in a solution of copper sulphate (CuSO4), a chemical reaction occurs. Iron (Fe) is more reactive than copper (Cu), so it displaces copper from the copper sulphate solution. The reaction is: Fe (s) + CuSO4 (aq) \u2192 FeSO4 (aq) + Cu (s). This results in a brownish deposit of copper on the iron nail and the blue colour of the copper sulphate solution fading as iron sulphate (FeSO4), which is light green, is formed. This type of reaction, where a more reactive element displaces a less reactive element from its compound, is called a displacement reaction.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/when-an-iron-nail-is-dipped-in-a-solution-of-copper-sulphate-the-iron\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:06:06+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"1 minute"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/when-an-iron-nail-is-dipped-in-a-solution-of-copper-sulphate-the-iron\/","url":"https:\/\/exam.pscnotes.com\/mcq\/when-an-iron-nail-is-dipped-in-a-solution-of-copper-sulphate-the-iron\/","name":"When an iron nail is dipped in a solution of copper sulphate, the iron","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:06:06+00:00","dateModified":"2025-06-01T10:06:06+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"When an iron nail is dipped in a solution of copper sulphate (CuSO4), a chemical reaction occurs. Iron (Fe) is more reactive than copper (Cu), so it displaces copper from the copper sulphate solution. The reaction is: Fe (s) + CuSO4 (aq) \u2192 FeSO4 (aq) + Cu (s). This results in a brownish deposit of copper on the iron nail and the blue colour of the copper sulphate solution fading as iron sulphate (FeSO4), which is light green, is formed. This type of reaction, where a more reactive element displaces a less reactive element from its compound, is called a displacement reaction.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/when-an-iron-nail-is-dipped-in-a-solution-of-copper-sulphate-the-iron\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/when-an-iron-nail-is-dipped-in-a-solution-of-copper-sulphate-the-iron\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/when-an-iron-nail-is-dipped-in-a-solution-of-copper-sulphate-the-iron\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CAPF","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-capf\/"},{"@type":"ListItem","position":3,"name":"When an iron nail is dipped in a solution of copper sulphate, the iron"}]},{"@type":"WebSite","@id":"https:\/\/exam.pscnotes.com\/mcq\/#website","url":"https:\/\/exam.pscnotes.com\/mcq\/","name":"MCQ and Quiz for Exams","description":"","potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/exam.pscnotes.com\/mcq\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"Person","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209","name":"rawan239","image":{"@type":"ImageObject","inLanguage":"en-US","@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/image\/","url":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","contentUrl":"https:\/\/secure.gravatar.com\/avatar\/761a7274f9cce048fa5b921221e7934820d74514df93ef195a9d22af0c1c9001?s=96&d=mm&r=g","caption":"rawan239"},"sameAs":["https:\/\/exam.pscnotes.com"],"url":"https:\/\/exam.pscnotes.com\/mcq\/author\/rawan239\/"}]}},"amp_enabled":true,"_links":{"self":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/89512","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/comments?post=89512"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/89512\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=89512"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=89512"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=89512"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}