{"id":87478,"date":"2025-06-01T06:45:00","date_gmt":"2025-06-01T06:45:00","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87478"},"modified":"2025-06-01T06:45:00","modified_gmt":"2025-06-01T06:45:00","slug":"which-one-of-the-following-elements-corrodes-rapidly","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-elements-corrodes-rapidly\/","title":{"rendered":"Which one of the following elements corrodes rapidly?"},"content":{"rendered":"

Which one of the following elements corrodes rapidly?<\/p>\n

[amp_mcq option1=”Aluminium” option2=”Iron” option3=”Zinc” option4=”Silver” correct=”option2″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC NDA-1 – 2017<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nIron corrodes rapidly, especially in the presence of oxygen and moisture, through a process known as rusting. While all the listed metals can corrode, iron’s corrosion product (rust) is porous and flakes off, exposing fresh metal to further corrosion, leading to rapid deterioration compared to the others.
\n<\/section>\n
\nCorrosion is an electrochemical process. Iron corrodes to form hydrated iron oxides, which are commonly called rust. Unlike aluminium and zinc, which form protective oxide layers (passivation), rust does not adhere strongly to the surface and is permeable to air and water, allowing corrosion to continue unchecked. Silver tarnishes by reacting with sulfur, forming a thin layer of silver sulfide, but this is a surface phenomenon and not as destructive as the rusting of iron.
\n<\/section>\n
\nAluminium is highly reactive but forms a protective, adherent oxide layer. Zinc is more reactive than iron but also forms a protective layer (e.g., zinc carbonate or oxide) that inhibits further corrosion, and it is used in galvanization to protect iron sacrificially. Silver is a relatively noble metal and corrodes slowly, primarily through tarnishing. Therefore, iron corrodes most rapidly among the given options under typical atmospheric conditions.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following elements corrodes rapidly? [amp_mcq option1=”Aluminium” option2=”Iron” option3=”Zinc” option4=”Silver” correct=”option2″] This question was previously asked in UPSC NDA-1 – 2017 Download PDFAttempt Online Iron corrodes rapidly, especially in the presence of oxygen and moisture, through a process known as rusting. While all the listed metals can corrode, iron’s corrosion product (rust) … <\/p>\n

Detailed SolutionWhich one of the following elements corrodes rapidly?<\/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":[1101,1096,1109],"class_list":["post-87478","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1101","tag-chemistry","tag-metals-minerals-ores-properties-uses","no-featured-image-padding"],"yoast_head":"\nWhich one of the following elements corrodes rapidly?<\/title>\n<meta name=\"description\" content=\"Iron corrodes rapidly, especially in the presence of oxygen and moisture, through a process known as rusting. While all the listed metals can corrode, iron's corrosion product (rust) is porous and flakes off, exposing fresh metal to further corrosion, leading to rapid deterioration compared to the others. Corrosion is an electrochemical process. Iron corrodes to form hydrated iron oxides, which are commonly called rust. Unlike aluminium and zinc, which form protective oxide layers (passivation), rust does not adhere strongly to the surface and is permeable to air and water, allowing corrosion to continue unchecked. Silver tarnishes by reacting with sulfur, forming a thin layer of silver sulfide, but this is a surface phenomenon and not as destructive as the rusting of iron.\" \/>\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-elements-corrodes-rapidly\/\" \/>\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 elements corrodes rapidly?\" \/>\n<meta property=\"og:description\" content=\"Iron corrodes rapidly, especially in the presence of oxygen and moisture, through a process known as rusting. While all the listed metals can corrode, iron's corrosion product (rust) is porous and flakes off, exposing fresh metal to further corrosion, leading to rapid deterioration compared to the others. Corrosion is an electrochemical process. Iron corrodes to form hydrated iron oxides, which are commonly called rust. Unlike aluminium and zinc, which form protective oxide layers (passivation), rust does not adhere strongly to the surface and is permeable to air and water, allowing corrosion to continue unchecked. Silver tarnishes by reacting with sulfur, forming a thin layer of silver sulfide, but this is a surface phenomenon and not as destructive as the rusting of iron.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-elements-corrodes-rapidly\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T06:45:00+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 elements corrodes rapidly?","description":"Iron corrodes rapidly, especially in the presence of oxygen and moisture, through a process known as rusting. While all the listed metals can corrode, iron's corrosion product (rust) is porous and flakes off, exposing fresh metal to further corrosion, leading to rapid deterioration compared to the others. Corrosion is an electrochemical process. Iron corrodes to form hydrated iron oxides, which are commonly called rust. Unlike aluminium and zinc, which form protective oxide layers (passivation), rust does not adhere strongly to the surface and is permeable to air and water, allowing corrosion to continue unchecked. Silver tarnishes by reacting with sulfur, forming a thin layer of silver sulfide, but this is a surface phenomenon and not as destructive as the rusting of iron.","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-elements-corrodes-rapidly\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following elements corrodes rapidly?","og_description":"Iron corrodes rapidly, especially in the presence of oxygen and moisture, through a process known as rusting. While all the listed metals can corrode, iron's corrosion product (rust) is porous and flakes off, exposing fresh metal to further corrosion, leading to rapid deterioration compared to the others. Corrosion is an electrochemical process. Iron corrodes to form hydrated iron oxides, which are commonly called rust. Unlike aluminium and zinc, which form protective oxide layers (passivation), rust does not adhere strongly to the surface and is permeable to air and water, allowing corrosion to continue unchecked. Silver tarnishes by reacting with sulfur, forming a thin layer of silver sulfide, but this is a surface phenomenon and not as destructive as the rusting of iron.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-elements-corrodes-rapidly\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T06:45:00+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-elements-corrodes-rapidly\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-elements-corrodes-rapidly\/","name":"Which one of the following elements corrodes rapidly?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T06:45:00+00:00","dateModified":"2025-06-01T06:45:00+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Iron corrodes rapidly, especially in the presence of oxygen and moisture, through a process known as rusting. While all the listed metals can corrode, iron's corrosion product (rust) is porous and flakes off, exposing fresh metal to further corrosion, leading to rapid deterioration compared to the others. Corrosion is an electrochemical process. Iron corrodes to form hydrated iron oxides, which are commonly called rust. Unlike aluminium and zinc, which form protective oxide layers (passivation), rust does not adhere strongly to the surface and is permeable to air and water, allowing corrosion to continue unchecked. 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