{"id":90579,"date":"2025-06-01T10:31:23","date_gmt":"2025-06-01T10:31:23","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=90579"},"modified":"2025-06-01T10:31:23","modified_gmt":"2025-06-01T10:31:23","slug":"which-one-of-the-following-metal-oxides-does-not-usually-react-with-so","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-metal-oxides-does-not-usually-react-with-so\/","title":{"rendered":"Which one of the following metal oxides does not usually react with so"},"content":{"rendered":"

Which one of the following metal oxides does not usually react with sodium hydroxide?<\/p>\n

[amp_mcq option1=”Copper oxide” option2=”Aluminium oxide” option3=”Potassium oxide” option4=”Calcium oxide” correct=”option1″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CAPF – 2021<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe correct answer is A) Copper oxide.
\n<\/section>\n
\nSodium hydroxide (NaOH) is a strong base. Basic metal oxides react with acids, and acidic oxides react with bases. Amphoteric oxides react with both acids and strong bases.
\nAluminium oxide (Al\u2082O\u2083) is an amphoteric oxide and reacts with sodium hydroxide: Al\u2082O\u2083 + 2NaOH \u2192 2NaAlO\u2082 + H\u2082O (at high temperature\/concentration) or Al\u2082O\u2083 + 6NaOH + 3H\u2082O \u2192 2Na\u2083[Al(OH)\u2086] (in aqueous solution).
\nPotassium oxide (K\u2082O) and Calcium oxide (CaO) are basic oxides. They react vigorously with water to form potassium hydroxide (KOH) and calcium hydroxide (Ca(OH)\u2082), respectively, which are strong bases. Being bases, KOH and Ca(OH)\u2082 do not react with another base like NaOH.
\nCopper oxide (CuO) is also a basic oxide. It does not react with water and does not react with sodium hydroxide solution under usual conditions.
\nAmong the given options, Aluminium oxide reacts with NaOH. Potassium oxide and Calcium oxide react with water to form hydroxides that do not react with NaOH. Copper oxide is a basic oxide that neither reacts significantly with water nor with NaOH solution under usual conditions. Therefore, Copper oxide is the one that does not usually react with sodium hydroxide.
\n<\/section>\n
\nReactivity of metal oxides with bases depends on their acidic, basic, or amphoteric nature. Oxides of highly electropositive metals (Group 1 & 2) are strongly basic. Oxides of transition metals can be basic, amphoteric, or even acidic depending on the oxidation state. Oxides of metalloids and non-metals are typically amphoteric or acidic.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following metal oxides does not usually react with sodium hydroxide? [amp_mcq option1=”Copper oxide” option2=”Aluminium oxide” option3=”Potassium oxide” option4=”Calcium oxide” correct=”option1″] This question was previously asked in UPSC CAPF – 2021 Download PDFAttempt Online The correct answer is A) Copper oxide. Sodium hydroxide (NaOH) is a strong base. Basic metal oxides react … <\/p>\n

Detailed SolutionWhich one of the following metal oxides does not usually react with so<\/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":[1110,1096,1239],"class_list":["post-90579","post","type-post","status-publish","format-standard","hentry","category-upsc-capf","tag-1110","tag-chemistry","tag-inorganic-chemistry","no-featured-image-padding"],"yoast_head":"\nWhich one of the following metal oxides does not usually react with so<\/title>\n<meta name=\"description\" content=\"The correct answer is A) Copper oxide. Sodium hydroxide (NaOH) is a strong base. Basic metal oxides react with acids, and acidic oxides react with bases. Amphoteric oxides react with both acids and strong bases. Aluminium oxide (Al\u2082O\u2083) is an amphoteric oxide and reacts with sodium hydroxide: Al\u2082O\u2083 + 2NaOH \u2192 2NaAlO\u2082 + H\u2082O (at high temperature\/concentration) or Al\u2082O\u2083 + 6NaOH + 3H\u2082O \u2192 2Na\u2083[Al(OH)\u2086] (in aqueous solution). Potassium oxide (K\u2082O) and Calcium oxide (CaO) are basic oxides. They react vigorously with water to form potassium hydroxide (KOH) and calcium hydroxide (Ca(OH)\u2082), respectively, which are strong bases. Being bases, KOH and Ca(OH)\u2082 do not react with another base like NaOH. Copper oxide (CuO) is also a basic oxide. It does not react with water and does not react with sodium hydroxide solution under usual conditions. Among the given options, Aluminium oxide reacts with NaOH. Potassium oxide and Calcium oxide react with water to form hydroxides that do not react with NaOH. Copper oxide is a basic oxide that neither reacts significantly with water nor with NaOH solution under usual conditions. Therefore, Copper oxide is the one that does not usually react with sodium hydroxide.\" \/>\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-metal-oxides-does-not-usually-react-with-so\/\" \/>\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 metal oxides does not usually react with so\" \/>\n<meta property=\"og:description\" content=\"The correct answer is A) Copper oxide. Sodium hydroxide (NaOH) is a strong base. Basic metal oxides react with acids, and acidic oxides react with bases. Amphoteric oxides react with both acids and strong bases. Aluminium oxide (Al\u2082O\u2083) is an amphoteric oxide and reacts with sodium hydroxide: Al\u2082O\u2083 + 2NaOH \u2192 2NaAlO\u2082 + H\u2082O (at high temperature\/concentration) or Al\u2082O\u2083 + 6NaOH + 3H\u2082O \u2192 2Na\u2083[Al(OH)\u2086] (in aqueous solution). Potassium oxide (K\u2082O) and Calcium oxide (CaO) are basic oxides. They react vigorously with water to form potassium hydroxide (KOH) and calcium hydroxide (Ca(OH)\u2082), respectively, which are strong bases. Being bases, KOH and Ca(OH)\u2082 do not react with another base like NaOH. Copper oxide (CuO) is also a basic oxide. It does not react with water and does not react with sodium hydroxide solution under usual conditions. Among the given options, Aluminium oxide reacts with NaOH. Potassium oxide and Calcium oxide react with water to form hydroxides that do not react with NaOH. Copper oxide is a basic oxide that neither reacts significantly with water nor with NaOH solution under usual conditions. Therefore, Copper oxide is the one that does not usually react with sodium hydroxide.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-metal-oxides-does-not-usually-react-with-so\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T10:31:23+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 metal oxides does not usually react with so","description":"The correct answer is A) Copper oxide. Sodium hydroxide (NaOH) is a strong base. Basic metal oxides react with acids, and acidic oxides react with bases. Amphoteric oxides react with both acids and strong bases. Aluminium oxide (Al\u2082O\u2083) is an amphoteric oxide and reacts with sodium hydroxide: Al\u2082O\u2083 + 2NaOH \u2192 2NaAlO\u2082 + H\u2082O (at high temperature\/concentration) or Al\u2082O\u2083 + 6NaOH + 3H\u2082O \u2192 2Na\u2083[Al(OH)\u2086] (in aqueous solution). Potassium oxide (K\u2082O) and Calcium oxide (CaO) are basic oxides. They react vigorously with water to form potassium hydroxide (KOH) and calcium hydroxide (Ca(OH)\u2082), respectively, which are strong bases. Being bases, KOH and Ca(OH)\u2082 do not react with another base like NaOH. Copper oxide (CuO) is also a basic oxide. It does not react with water and does not react with sodium hydroxide solution under usual conditions. Among the given options, Aluminium oxide reacts with NaOH. Potassium oxide and Calcium oxide react with water to form hydroxides that do not react with NaOH. Copper oxide is a basic oxide that neither reacts significantly with water nor with NaOH solution under usual conditions. Therefore, Copper oxide is the one that does not usually react with sodium hydroxide.","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-metal-oxides-does-not-usually-react-with-so\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following metal oxides does not usually react with so","og_description":"The correct answer is A) Copper oxide. Sodium hydroxide (NaOH) is a strong base. Basic metal oxides react with acids, and acidic oxides react with bases. Amphoteric oxides react with both acids and strong bases. Aluminium oxide (Al\u2082O\u2083) is an amphoteric oxide and reacts with sodium hydroxide: Al\u2082O\u2083 + 2NaOH \u2192 2NaAlO\u2082 + H\u2082O (at high temperature\/concentration) or Al\u2082O\u2083 + 6NaOH + 3H\u2082O \u2192 2Na\u2083[Al(OH)\u2086] (in aqueous solution). Potassium oxide (K\u2082O) and Calcium oxide (CaO) are basic oxides. They react vigorously with water to form potassium hydroxide (KOH) and calcium hydroxide (Ca(OH)\u2082), respectively, which are strong bases. Being bases, KOH and Ca(OH)\u2082 do not react with another base like NaOH. Copper oxide (CuO) is also a basic oxide. It does not react with water and does not react with sodium hydroxide solution under usual conditions. Among the given options, Aluminium oxide reacts with NaOH. Potassium oxide and Calcium oxide react with water to form hydroxides that do not react with NaOH. Copper oxide is a basic oxide that neither reacts significantly with water nor with NaOH solution under usual conditions. Therefore, Copper oxide is the one that does not usually react with sodium hydroxide.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-metal-oxides-does-not-usually-react-with-so\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T10:31:23+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-metal-oxides-does-not-usually-react-with-so\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-metal-oxides-does-not-usually-react-with-so\/","name":"Which one of the following metal oxides does not usually react with so","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T10:31:23+00:00","dateModified":"2025-06-01T10:31:23+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The correct answer is A) Copper oxide. Sodium hydroxide (NaOH) is a strong base. Basic metal oxides react with acids, and acidic oxides react with bases. Amphoteric oxides react with both acids and strong bases. Aluminium oxide (Al\u2082O\u2083) is an amphoteric oxide and reacts with sodium hydroxide: Al\u2082O\u2083 + 2NaOH \u2192 2NaAlO\u2082 + H\u2082O (at high temperature\/concentration) or Al\u2082O\u2083 + 6NaOH + 3H\u2082O \u2192 2Na\u2083[Al(OH)\u2086] (in aqueous solution). Potassium oxide (K\u2082O) and Calcium oxide (CaO) are basic oxides. They react vigorously with water to form potassium hydroxide (KOH) and calcium hydroxide (Ca(OH)\u2082), respectively, which are strong bases. Being bases, KOH and Ca(OH)\u2082 do not react with another base like NaOH. Copper oxide (CuO) is also a basic oxide. It does not react with water and does not react with sodium hydroxide solution under usual conditions. Among the given options, Aluminium oxide reacts with NaOH. Potassium oxide and Calcium oxide react with water to form hydroxides that do not react with NaOH. Copper oxide is a basic oxide that neither reacts significantly with water nor with NaOH solution under usual conditions. Therefore, Copper oxide is the one that does not usually react with sodium hydroxide.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-metal-oxides-does-not-usually-react-with-so\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-metal-oxides-does-not-usually-react-with-so\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-metal-oxides-does-not-usually-react-with-so\/#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":"Which one of the following metal oxides does not usually react with so"}]},{"@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\/90579","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=90579"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/90579\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=90579"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=90579"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=90579"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}