{"id":85582,"date":"2025-06-01T03:22:02","date_gmt":"2025-06-01T03:22:02","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=85582"},"modified":"2025-06-01T03:22:02","modified_gmt":"2025-06-01T03:22:02","slug":"which-one-of-the-following-elements-does-not-form-solid-hydrogen","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-elements-does-not-form-solid-hydrogen\/","title":{"rendered":"Which one of the following elements does not form solid hydrogen"},"content":{"rendered":"

Which one of the following elements does not<\/b> form solid hydrogen carbonate?<\/p>\n

[amp_mcq option1=”Sodium” option2=”Potassium” option3=”Caesium” option4=”Lithium” correct=”option4″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC CDS-2 – 2016<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nLithium (Li) is the first element in the alkali metal group (Group 1). While other alkali metals (Sodium, Potassium, Rubidium, Caesium) form stable solid hydrogen carbonates (M\u0397CO\u2083), Lithium hydrogen carbonate (LiHCO\u2083) is significantly less stable as a solid.
\n<\/section>\n
\nLiHCO\u2083 exists in aqueous solution, but when attempts are made to isolate it as a solid, it readily decomposes upon heating or dehydration into lithium carbonate (Li\u2082CO\u2083), water (H\u2082O), and carbon dioxide (CO\u2082). This instability prevents the formation of a stable solid crystalline LiHCO\u2083 under normal conditions, unlike NaHCO\u2083, KHCO\u2083, CsHCO\u2083, etc., which are stable solids. This difference is often attributed to Lithium’s small ionic size and relatively high polarizing power (diagonal relationship with Magnesium).
\n<\/section>\n
\nThe stability of alkali metal bicarbonates increases down the group. Sodium bicarbonate (baking soda) and Potassium bicarbonate are common solid compounds.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one of the following elements does not form solid hydrogen carbonate? [amp_mcq option1=”Sodium” option2=”Potassium” option3=”Caesium” option4=”Lithium” correct=”option4″] This question was previously asked in UPSC CDS-2 – 2016 Download PDFAttempt Online Lithium (Li) is the first element in the alkali metal group (Group 1). While other alkali metals (Sodium, Potassium, Rubidium, Caesium) form stable solid … <\/p>\n

Detailed SolutionWhich one of the following elements does not form solid hydrogen<\/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":[1088],"tags":[1098,1096,1239],"class_list":["post-85582","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-2","tag-1098","tag-chemistry","tag-inorganic-chemistry","no-featured-image-padding"],"yoast_head":"\nWhich one of the following elements does not form solid hydrogen<\/title>\n<meta name=\"description\" content=\"Lithium (Li) is the first element in the alkali metal group (Group 1). While other alkali metals (Sodium, Potassium, Rubidium, Caesium) form stable solid hydrogen carbonates (M\u0397CO\u2083), Lithium hydrogen carbonate (LiHCO\u2083) is significantly less stable as a solid. LiHCO\u2083 exists in aqueous solution, but when attempts are made to isolate it as a solid, it readily decomposes upon heating or dehydration into lithium carbonate (Li\u2082CO\u2083), water (H\u2082O), and carbon dioxide (CO\u2082). This instability prevents the formation of a stable solid crystalline LiHCO\u2083 under normal conditions, unlike NaHCO\u2083, KHCO\u2083, CsHCO\u2083, etc., which are stable solids. This difference is often attributed to Lithium's small ionic size and relatively high polarizing power (diagonal relationship with Magnesium).\" \/>\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-does-not-form-solid-hydrogen\/\" \/>\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 does not form solid hydrogen\" \/>\n<meta property=\"og:description\" content=\"Lithium (Li) is the first element in the alkali metal group (Group 1). While other alkali metals (Sodium, Potassium, Rubidium, Caesium) form stable solid hydrogen carbonates (M\u0397CO\u2083), Lithium hydrogen carbonate (LiHCO\u2083) is significantly less stable as a solid. LiHCO\u2083 exists in aqueous solution, but when attempts are made to isolate it as a solid, it readily decomposes upon heating or dehydration into lithium carbonate (Li\u2082CO\u2083), water (H\u2082O), and carbon dioxide (CO\u2082). This instability prevents the formation of a stable solid crystalline LiHCO\u2083 under normal conditions, unlike NaHCO\u2083, KHCO\u2083, CsHCO\u2083, etc., which are stable solids. This difference is often attributed to Lithium's small ionic size and relatively high polarizing power (diagonal relationship with Magnesium).\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-elements-does-not-form-solid-hydrogen\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T03:22:02+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 elements does not form solid hydrogen","description":"Lithium (Li) is the first element in the alkali metal group (Group 1). While other alkali metals (Sodium, Potassium, Rubidium, Caesium) form stable solid hydrogen carbonates (M\u0397CO\u2083), Lithium hydrogen carbonate (LiHCO\u2083) is significantly less stable as a solid. LiHCO\u2083 exists in aqueous solution, but when attempts are made to isolate it as a solid, it readily decomposes upon heating or dehydration into lithium carbonate (Li\u2082CO\u2083), water (H\u2082O), and carbon dioxide (CO\u2082). This instability prevents the formation of a stable solid crystalline LiHCO\u2083 under normal conditions, unlike NaHCO\u2083, KHCO\u2083, CsHCO\u2083, etc., which are stable solids. This difference is often attributed to Lithium's small ionic size and relatively high polarizing power (diagonal relationship with Magnesium).","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-does-not-form-solid-hydrogen\/","og_locale":"en_US","og_type":"article","og_title":"Which one of the following elements does not form solid hydrogen","og_description":"Lithium (Li) is the first element in the alkali metal group (Group 1). While other alkali metals (Sodium, Potassium, Rubidium, Caesium) form stable solid hydrogen carbonates (M\u0397CO\u2083), Lithium hydrogen carbonate (LiHCO\u2083) is significantly less stable as a solid. LiHCO\u2083 exists in aqueous solution, but when attempts are made to isolate it as a solid, it readily decomposes upon heating or dehydration into lithium carbonate (Li\u2082CO\u2083), water (H\u2082O), and carbon dioxide (CO\u2082). This instability prevents the formation of a stable solid crystalline LiHCO\u2083 under normal conditions, unlike NaHCO\u2083, KHCO\u2083, CsHCO\u2083, etc., which are stable solids. This difference is often attributed to Lithium's small ionic size and relatively high polarizing power (diagonal relationship with Magnesium).","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-elements-does-not-form-solid-hydrogen\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T03:22:02+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-elements-does-not-form-solid-hydrogen\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-elements-does-not-form-solid-hydrogen\/","name":"Which one of the following elements does not form solid hydrogen","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T03:22:02+00:00","dateModified":"2025-06-01T03:22:02+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Lithium (Li) is the first element in the alkali metal group (Group 1). While other alkali metals (Sodium, Potassium, Rubidium, Caesium) form stable solid hydrogen carbonates (M\u0397CO\u2083), Lithium hydrogen carbonate (LiHCO\u2083) is significantly less stable as a solid. LiHCO\u2083 exists in aqueous solution, but when attempts are made to isolate it as a solid, it readily decomposes upon heating or dehydration into lithium carbonate (Li\u2082CO\u2083), water (H\u2082O), and carbon dioxide (CO\u2082). This instability prevents the formation of a stable solid crystalline LiHCO\u2083 under normal conditions, unlike NaHCO\u2083, KHCO\u2083, CsHCO\u2083, etc., which are stable solids. This difference is often attributed to Lithium's small ionic size and relatively high polarizing power (diagonal relationship with Magnesium).","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-elements-does-not-form-solid-hydrogen\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-elements-does-not-form-solid-hydrogen\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-of-the-following-elements-does-not-form-solid-hydrogen\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC CDS-2","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-cds-2\/"},{"@type":"ListItem","position":3,"name":"Which one of the following elements does not form solid hydrogen"}]},{"@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\/85582","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=85582"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/85582\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=85582"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=85582"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=85582"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}