{"id":88087,"date":"2025-06-01T07:01:17","date_gmt":"2025-06-01T07:01:17","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=88087"},"modified":"2025-06-01T07:01:17","modified_gmt":"2025-06-01T07:01:17","slug":"which-one-among-the-following-oxides-has-the-highest-melting-point","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-oxides-has-the-highest-melting-point\/","title":{"rendered":"Which one among the following oxides has the highest melting point ?"},"content":{"rendered":"

Which one among the following oxides has the highest melting point ?<\/p>\n

[amp_mcq option1=”Na\u2082O” option2=”MgO” option3=”Fe\u2082O\u2083” option4=”CuO” correct=”option2″]<\/p>\n

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This question was previously asked in<\/div>\n
UPSC NDA-1 – 2024<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
Among the given options, Magnesium oxide (MgO) has the highest melting point.<\/section>\n
Oxides of highly electropositive metals (like those in Group 1 and 2) and transition metals are generally ionic compounds with high melting points due to strong electrostatic forces in the crystal lattice. MgO is a Group 2 metal oxide with high lattice energy primarily due to the +2 and -2 charges of Mg\u00b2\u207a and O\u00b2\u207b ions and their relatively small ionic radii, resulting in a very high melting point (~2852 \u00b0C).<\/section>\n
Comparing the options: Na\u2082O (~1132 \u00b0C), MgO (~2852 \u00b0C), Fe\u2082O\u2083 (~1565 \u00b0C, decomposes), CuO (~1326 \u00b0C, decomposes). MgO’s melting point is significantly higher than the others listed, making it a refractory material.<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one among the following oxides has the highest melting point ? [amp_mcq option1=”Na\u2082O” option2=”MgO” option3=”Fe\u2082O\u2083” option4=”CuO” correct=”option2″] This question was previously asked in UPSC NDA-1 – 2024 Download PDFAttempt Online Among the given options, Magnesium oxide (MgO) has the highest melting point. Oxides of highly electropositive metals (like those in Group 1 and 2) … <\/p>\n

Detailed SolutionWhich one among the following oxides has the highest melting point ?<\/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":[1103,1096,1239],"class_list":["post-88087","post","type-post","status-publish","format-standard","hentry","category-upsc-nda-1","tag-1103","tag-chemistry","tag-inorganic-chemistry","no-featured-image-padding"],"yoast_head":"\nWhich one among the following oxides has the highest melting point ?<\/title>\n<meta name=\"description\" content=\"Among the given options, Magnesium oxide (MgO) has the highest melting point. Oxides of highly electropositive metals (like those in Group 1 and 2) and transition metals are generally ionic compounds with high melting points due to strong electrostatic forces in the crystal lattice. MgO is a Group 2 metal oxide with high lattice energy primarily due to the +2 and -2 charges of Mg\u00b2\u207a and O\u00b2\u207b ions and their relatively small ionic radii, resulting in a very high melting point (~2852 \u00b0C).\" \/>\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-among-the-following-oxides-has-the-highest-melting-point\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which one among the following oxides has the highest melting point ?\" \/>\n<meta property=\"og:description\" content=\"Among the given options, Magnesium oxide (MgO) has the highest melting point. Oxides of highly electropositive metals (like those in Group 1 and 2) and transition metals are generally ionic compounds with high melting points due to strong electrostatic forces in the crystal lattice. MgO is a Group 2 metal oxide with high lattice energy primarily due to the +2 and -2 charges of Mg\u00b2\u207a and O\u00b2\u207b ions and their relatively small ionic radii, resulting in a very high melting point (~2852 \u00b0C).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-oxides-has-the-highest-melting-point\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T07:01:17+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 among the following oxides has the highest melting point ?","description":"Among the given options, Magnesium oxide (MgO) has the highest melting point. Oxides of highly electropositive metals (like those in Group 1 and 2) and transition metals are generally ionic compounds with high melting points due to strong electrostatic forces in the crystal lattice. MgO is a Group 2 metal oxide with high lattice energy primarily due to the +2 and -2 charges of Mg\u00b2\u207a and O\u00b2\u207b ions and their relatively small ionic radii, resulting in a very high melting point (~2852 \u00b0C).","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-among-the-following-oxides-has-the-highest-melting-point\/","og_locale":"en_US","og_type":"article","og_title":"Which one among the following oxides has the highest melting point ?","og_description":"Among the given options, Magnesium oxide (MgO) has the highest melting point. Oxides of highly electropositive metals (like those in Group 1 and 2) and transition metals are generally ionic compounds with high melting points due to strong electrostatic forces in the crystal lattice. MgO is a Group 2 metal oxide with high lattice energy primarily due to the +2 and -2 charges of Mg\u00b2\u207a and O\u00b2\u207b ions and their relatively small ionic radii, resulting in a very high melting point (~2852 \u00b0C).","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-oxides-has-the-highest-melting-point\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T07:01:17+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-among-the-following-oxides-has-the-highest-melting-point\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-oxides-has-the-highest-melting-point\/","name":"Which one among the following oxides has the highest melting point ?","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T07:01:17+00:00","dateModified":"2025-06-01T07:01:17+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Among the given options, Magnesium oxide (MgO) has the highest melting point. Oxides of highly electropositive metals (like those in Group 1 and 2) and transition metals are generally ionic compounds with high melting points due to strong electrostatic forces in the crystal lattice. MgO is a Group 2 metal oxide with high lattice energy primarily due to the +2 and -2 charges of Mg\u00b2\u207a and O\u00b2\u207b ions and their relatively small ionic radii, resulting in a very high melting point (~2852 \u00b0C).","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-oxides-has-the-highest-melting-point\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-oxides-has-the-highest-melting-point\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-oxides-has-the-highest-melting-point\/#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 among the following oxides has the highest melting point ?"}]},{"@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\/88087","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=88087"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/88087\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=88087"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=88087"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=88087"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}