{"id":86749,"date":"2025-06-01T04:20:02","date_gmt":"2025-06-01T04:20:02","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=86749"},"modified":"2025-06-01T04:20:02","modified_gmt":"2025-06-01T04:20:02","slug":"which-one-of-the-following-is-the-correct-order-of-relative-reactiviti","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-correct-order-of-relative-reactiviti\/","title":{"rendered":"Which one of the following is the correct order of relative reactiviti"},"content":{"rendered":"

Which one of the following is the correct order of relative reactivities of metals Ca, Al, Hg and Au?<\/p>\n

[amp_mcq option1=”Ca > Al > Hg > Au” option2=”Au > Hg > Al > Ca” option3=”Al > Ca > Hg > Au” option4=”Ca > Al > Au > Hg” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC Geoscientist – 2021<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe reactivity of metals is typically determined by their tendency to lose electrons and form positive ions. This is represented by the reactivity series. The standard reactivity series is: K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Hg > Ag > Au > Pt.
\nComparing the given metals:
\nCalcium (Ca) is above Aluminium (Al) in the series.
\nAluminium (Al) is above Mercury (Hg) and Gold (Au).
\nMercury (Hg) is above Gold (Au).
\nTherefore, the correct order of decreasing reactivity is Ca > Al > Hg > Au.
\n<\/section>\n
\nThe reactivity series orders metals from most reactive (top) to least reactive (bottom) based on their tendency to lose electrons. Ca is higher than Al, which is higher than Hg, which is higher than Au.
\n<\/section>\n
\nMore reactive metals can displace less reactive metals from their compounds. Gold and Platinum are known as noble metals because they are very unreactive.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following is the correct order of relative reactivities of metals Ca, Al, Hg and Au? [amp_mcq option1=”Ca > Al > Hg > Au” option2=”Au > Hg > Al > Ca” option3=”Al > Ca > Hg > Au” option4=”Ca > Al > Au > Hg” correct=”option1″] This question was previously asked in … <\/p>\n

Detailed SolutionWhich one of the following is the correct order of relative reactiviti<\/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":[1091],"tags":[1110,1096,1109],"class_list":["post-86749","post","type-post","status-publish","format-standard","hentry","category-upsc-geoscientist","tag-1110","tag-chemistry","tag-metals-minerals-ores-properties-uses","no-featured-image-padding"],"yoast_head":"\nWhich one of the following is the correct order of relative reactiviti<\/title>\n<meta name=\"description\" content=\"The reactivity of metals is typically determined by their tendency to lose electrons and form positive ions. This is represented by the reactivity series. The standard reactivity series is: K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Hg > Ag > Au > Pt. Comparing the given metals: Calcium (Ca) is above Aluminium (Al) in the series. Aluminium (Al) is above Mercury (Hg) and Gold (Au). Mercury (Hg) is above Gold (Au). Therefore, the correct order of decreasing reactivity is Ca > Al > Hg > Au. The reactivity series orders metals from most reactive (top) to least reactive (bottom) based on their tendency to lose electrons. Ca is higher than Al, which is higher than Hg, which is higher than Au.\" \/>\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-is-the-correct-order-of-relative-reactiviti\/\" \/>\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 is the correct order of relative reactiviti\" \/>\n<meta property=\"og:description\" content=\"The reactivity of metals is typically determined by their tendency to lose electrons and form positive ions. This is represented by the reactivity series. The standard reactivity series is: K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Hg > Ag > Au > Pt. Comparing the given metals: Calcium (Ca) is above Aluminium (Al) in the series. Aluminium (Al) is above Mercury (Hg) and Gold (Au). Mercury (Hg) is above Gold (Au). Therefore, the correct order of decreasing reactivity is Ca > Al > Hg > Au. The reactivity series orders metals from most reactive (top) to least reactive (bottom) based on their tendency to lose electrons. Ca is higher than Al, which is higher than Hg, which is higher than Au.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-correct-order-of-relative-reactiviti\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T04:20:02+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 is the correct order of relative reactiviti","description":"The reactivity of metals is typically determined by their tendency to lose electrons and form positive ions. This is represented by the reactivity series. The standard reactivity series is: K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Hg > Ag > Au > Pt. Comparing the given metals: Calcium (Ca) is above Aluminium (Al) in the series. Aluminium (Al) is above Mercury (Hg) and Gold (Au). Mercury (Hg) is above Gold (Au). Therefore, the correct order of decreasing reactivity is Ca > Al > Hg > Au. The reactivity series orders metals from most reactive (top) to least reactive (bottom) based on their tendency to lose electrons. Ca is higher than Al, which is higher than Hg, which is higher than Au.","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-is-the-correct-order-of-relative-reactiviti\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following is the correct order of relative reactiviti","og_description":"The reactivity of metals is typically determined by their tendency to lose electrons and form positive ions. This is represented by the reactivity series. The standard reactivity series is: K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Hg > Ag > Au > Pt. Comparing the given metals: Calcium (Ca) is above Aluminium (Al) in the series. Aluminium (Al) is above Mercury (Hg) and Gold (Au). Mercury (Hg) is above Gold (Au). Therefore, the correct order of decreasing reactivity is Ca > Al > Hg > Au. The reactivity series orders metals from most reactive (top) to least reactive (bottom) based on their tendency to lose electrons. Ca is higher than Al, which is higher than Hg, which is higher than Au.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-correct-order-of-relative-reactiviti\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T04:20:02+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-is-the-correct-order-of-relative-reactiviti\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-is-the-correct-order-of-relative-reactiviti\/","name":"Which one of the following is the correct order of relative reactiviti","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T04:20:02+00:00","dateModified":"2025-06-01T04:20:02+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The reactivity of metals is typically determined by their tendency to lose electrons and form positive ions. This is represented by the reactivity series. The standard reactivity series is: K > Na > Ca > Mg > Al > Zn > Fe > Pb > H > Cu > Hg > Ag > Au > Pt. Comparing the given metals: Calcium (Ca) is above Aluminium (Al) in the series. Aluminium (Al) is above Mercury (Hg) and Gold (Au). Mercury (Hg) is above Gold (Au). Therefore, the correct order of decreasing reactivity is Ca > Al > Hg > Au. The reactivity series orders metals from most reactive (top) to least reactive (bottom) based on their tendency to lose electrons. 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