{"id":87663,"date":"2025-06-01T06:50:48","date_gmt":"2025-06-01T06:50:48","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87663"},"modified":"2025-06-01T06:50:48","modified_gmt":"2025-06-01T06:50:48","slug":"which-one-of-the-following-statements-is-not-correct-for-the-given-rea","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-for-the-given-rea\/","title":{"rendered":"Which one of the following statements is NOT correct for the given rea"},"content":{"rendered":"

Which one of the following statements is NOT correct for the given reaction ? Fe(s) + CuSO4(aq) \u2192 FeSO4(aq) + Cu(s)<\/p>\n

[amp_mcq option1=”Iron is the reducing agent” option2=”The solution turns green in colour after the reaction” option3=”Copper is a more reactive metal than iron” option4=”The reaction is an example of a redox reaction” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2019<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe reaction shown is a single displacement reaction where iron (Fe) displaces copper (Cu) from copper sulphate (CuSO\u2084) solution: Fe(s) + CuSO\u2084(aq) \u2192 FeSO\u2084(aq) + Cu(s). This occurs because iron is more reactive than copper. In the reactivity series of metals, a more reactive metal can displace a less reactive metal from its salt solution.
\n<\/section>\n
\n– Statement A is correct: Iron (oxidation state 0) is oxidized to Fe\u00b2\u207a (oxidation state +2) by losing electrons. A substance that causes reduction by being oxidized itself is called a reducing agent.
\n– Statement B is correct: Copper sulphate solution is typically blue in colour. Iron(II) sulphate (FeSO\u2084) solution, formed after the reaction, is green in colour. So, the solution’s colour changes from blue to green.
\n– Statement C is incorrect: The displacement of copper by iron indicates that iron is more reactive than copper. Copper is less reactive than iron.
\n– Statement D is correct: Iron is oxidized (Fe \u2192 Fe\u00b2\u207a) and copper ions are reduced (Cu\u00b2\u207a \u2192 Cu). Reactions involving both oxidation and reduction are called redox reactions.
\n<\/section>\n
\nThe reactivity series of metals (partially): K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Hg > Ag > Au. A metal higher in the series can displace a metal lower in the series from its salt solution.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following statements is NOT correct for the given reaction ? Fe(s) + CuSO4(aq) \u2192 FeSO4(aq) + Cu(s) [amp_mcq option1=”Iron is the reducing agent” option2=”The solution turns green in colour after the reaction” option3=”Copper is a more reactive metal than iron” option4=”The reaction is an example of a redox reaction” correct=”option3″] This … <\/p>\n

Detailed SolutionWhich one of the following statements is NOT correct for the given rea<\/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":[1093],"tags":[1119,1096,1155],"class_list":["post-87663","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1119","tag-chemistry","tag-physical-and-chemical-changes-solution","no-featured-image-padding"],"yoast_head":"\nWhich one of the following statements is NOT correct for the given rea<\/title>\n<meta name=\"description\" content=\"The reaction shown is a single displacement reaction where iron (Fe) displaces copper (Cu) from copper sulphate (CuSO\u2084) solution: Fe(s) + CuSO\u2084(aq) \u2192 FeSO\u2084(aq) + Cu(s). This occurs because iron is more reactive than copper. In the reactivity series of metals, a more reactive metal can displace a less reactive metal from its salt solution. - Statement A is correct: Iron (oxidation state 0) is oxidized to Fe\u00b2\u207a (oxidation state +2) by losing electrons. A substance that causes reduction by being oxidized itself is called a reducing agent. - Statement B is correct: Copper sulphate solution is typically blue in colour. Iron(II) sulphate (FeSO\u2084) solution, formed after the reaction, is green in colour. So, the solution's colour changes from blue to green. - Statement C is incorrect: The displacement of copper by iron indicates that iron is more reactive than copper. Copper is less reactive than iron. - Statement D is correct: Iron is oxidized (Fe \u2192 Fe\u00b2\u207a) and copper ions are reduced (Cu\u00b2\u207a \u2192 Cu). Reactions involving both oxidation and reduction are called redox reactions.\" \/>\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\/which-one-of-the-following-statements-is-not-correct-for-the-given-rea\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one of the following statements is NOT correct for the given rea\" \/>\n<meta property=\"og:description\" content=\"The reaction shown is a single displacement reaction where iron (Fe) displaces copper (Cu) from copper sulphate (CuSO\u2084) solution: Fe(s) + CuSO\u2084(aq) \u2192 FeSO\u2084(aq) + Cu(s). This occurs because iron is more reactive than copper. In the reactivity series of metals, a more reactive metal can displace a less reactive metal from its salt solution. - Statement A is correct: Iron (oxidation state 0) is oxidized to Fe\u00b2\u207a (oxidation state +2) by losing electrons. A substance that causes reduction by being oxidized itself is called a reducing agent. - Statement B is correct: Copper sulphate solution is typically blue in colour. Iron(II) sulphate (FeSO\u2084) solution, formed after the reaction, is green in colour. So, the solution's colour changes from blue to green. - Statement C is incorrect: The displacement of copper by iron indicates that iron is more reactive than copper. Copper is less reactive than iron. - Statement D is correct: Iron is oxidized (Fe \u2192 Fe\u00b2\u207a) and copper ions are reduced (Cu\u00b2\u207a \u2192 Cu). Reactions involving both oxidation and reduction are called redox reactions.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-for-the-given-rea\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:50:48+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":"Which one of the following statements is NOT correct for the given rea","description":"The reaction shown is a single displacement reaction where iron (Fe) displaces copper (Cu) from copper sulphate (CuSO\u2084) solution: Fe(s) + CuSO\u2084(aq) \u2192 FeSO\u2084(aq) + Cu(s). This occurs because iron is more reactive than copper. In the reactivity series of metals, a more reactive metal can displace a less reactive metal from its salt solution. - Statement A is correct: Iron (oxidation state 0) is oxidized to Fe\u00b2\u207a (oxidation state +2) by losing electrons. A substance that causes reduction by being oxidized itself is called a reducing agent. - Statement B is correct: Copper sulphate solution is typically blue in colour. Iron(II) sulphate (FeSO\u2084) solution, formed after the reaction, is green in colour. So, the solution's colour changes from blue to green. - Statement C is incorrect: The displacement of copper by iron indicates that iron is more reactive than copper. Copper is less reactive than iron. - Statement D is correct: Iron is oxidized (Fe \u2192 Fe\u00b2\u207a) and copper ions are reduced (Cu\u00b2\u207a \u2192 Cu). Reactions involving both oxidation and reduction are called redox reactions.","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\/which-one-of-the-following-statements-is-not-correct-for-the-given-rea\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following statements is NOT correct for the given rea","og_description":"The reaction shown is a single displacement reaction where iron (Fe) displaces copper (Cu) from copper sulphate (CuSO\u2084) solution: Fe(s) + CuSO\u2084(aq) \u2192 FeSO\u2084(aq) + Cu(s). This occurs because iron is more reactive than copper. In the reactivity series of metals, a more reactive metal can displace a less reactive metal from its salt solution. - Statement A is correct: Iron (oxidation state 0) is oxidized to Fe\u00b2\u207a (oxidation state +2) by losing electrons. A substance that causes reduction by being oxidized itself is called a reducing agent. - Statement B is correct: Copper sulphate solution is typically blue in colour. Iron(II) sulphate (FeSO\u2084) solution, formed after the reaction, is green in colour. So, the solution's colour changes from blue to green. - Statement C is incorrect: The displacement of copper by iron indicates that iron is more reactive than copper. Copper is less reactive than iron. - Statement D is correct: Iron is oxidized (Fe \u2192 Fe\u00b2\u207a) and copper ions are reduced (Cu\u00b2\u207a \u2192 Cu). Reactions involving both oxidation and reduction are called redox reactions.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-for-the-given-rea\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:50:48+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\/which-one-of-the-following-statements-is-not-correct-for-the-given-rea\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-for-the-given-rea\/","name":"Which one of the following statements is NOT correct for the given rea","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:50:48+00:00","dateModified":"2025-06-01T06:50:48+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The reaction shown is a single displacement reaction where iron (Fe) displaces copper (Cu) from copper sulphate (CuSO\u2084) solution: Fe(s) + CuSO\u2084(aq) \u2192 FeSO\u2084(aq) + Cu(s). This occurs because iron is more reactive than copper. In the reactivity series of metals, a more reactive metal can displace a less reactive metal from its salt solution. - Statement A is correct: Iron (oxidation state 0) is oxidized to Fe\u00b2\u207a (oxidation state +2) by losing electrons. A substance that causes reduction by being oxidized itself is called a reducing agent. - Statement B is correct: Copper sulphate solution is typically blue in colour. Iron(II) sulphate (FeSO\u2084) solution, formed after the reaction, is green in colour. So, the solution's colour changes from blue to green. - Statement C is incorrect: The displacement of copper by iron indicates that iron is more reactive than copper. Copper is less reactive than iron. - Statement D is correct: Iron is oxidized (Fe \u2192 Fe\u00b2\u207a) and copper ions are reduced (Cu\u00b2\u207a \u2192 Cu). Reactions involving both oxidation and reduction are called redox reactions.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-for-the-given-rea\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-for-the-given-rea\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-statements-is-not-correct-for-the-given-rea\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC NDA-1","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-nda-1\/"},{"@type":"ListItem","position":3,"name":"Which one of the following statements is NOT correct for the given rea"}]},{"@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\/87663","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=87663"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/87663\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=87663"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=87663"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=87663"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}