{"id":87080,"date":"2025-06-01T04:27:40","date_gmt":"2025-06-01T04:27:40","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=87080"},"modified":"2025-06-01T04:27:40","modified_gmt":"2025-06-01T04:27:40","slug":"which-one-among-the-following-statements-regarding-acids-and-bases-is","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-statements-regarding-acids-and-bases-is\/","title":{"rendered":"Which one among the following statements regarding acids and bases is"},"content":{"rendered":"

Which one among the following statements regarding acids and bases is not correct ?<\/p>\n

[amp_mcq option1=”A conjugate base of a strong acid is a weak base.” option2=”In aqueous solution, the hydroxide ion is hydrated to give several ionic species like H\u2083O\u2082\u207b, H\u2085O\u2083\u207b and H\u2087O\u2084\u207b etc.” option3=”AlCl\u2083 is an electron deficient compound, and can act as a Lewis base.” option4=”Fluoride ion acts as a Lewis base as it can donate any one of its four electron lone pairs.” correct=”option3″]<\/p>\n

\n
\n
This question was previously asked in<\/div>\n
UPSC Geoscientist – 2024<\/div>\n<\/div>\n
Download PDF<\/a>Attempt Online<\/a><\/div>\n<\/div>\n
\nThe statement “AlCl\u2083 is an electron deficient compound, and can act as a Lewis base” is not correct.
\n<\/section>\n
\nAlCl\u2083 is electron deficient because the central aluminum atom has only six valence electrons (an incomplete octet). According to the Lewis definition, substances that can accept an electron pair are Lewis acids, while substances that can donate an electron pair are Lewis bases.
\n<\/section>\n
\nSince AlCl\u2083 is electron deficient, it readily accepts electron pairs from other molecules (like water, ammonia, or chloride ions) to complete its octet. Therefore, AlCl\u2083 acts as a Lewis acid, not a Lewis base. Statement A is correct (e.g., Cl- from HCl is a weak conjugate base). Statement B is correct regarding the hydration of hydroxide ions. Statement D is correct; a fluoride ion has four lone pairs and can donate one to act as a Lewis base.
\n<\/section>\n","protected":false},"excerpt":{"rendered":"

Which one among the following statements regarding acids and bases is not correct ? [amp_mcq option1=”A conjugate base of a strong acid is a weak base.” option2=”In aqueous solution, the hydroxide ion is hydrated to give several ionic species like H\u2083O\u2082\u207b, H\u2085O\u2083\u207b and H\u2087O\u2084\u207b etc.” option3=”AlCl\u2083 is an electron deficient compound, and can act as … <\/p>\n

Detailed SolutionWhich one among the following statements regarding acids and bases is<\/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":[1103,1202,1096],"class_list":["post-87080","post","type-post","status-publish","format-standard","hentry","category-upsc-geoscientist","tag-1103","tag-acid-base-and-salt","tag-chemistry","no-featured-image-padding"],"yoast_head":"\nWhich one among the following statements regarding acids and bases is<\/title>\n<meta name=\"description\" content=\"The statement "AlCl\u2083 is an electron deficient compound, and can act as a Lewis base" is not correct. AlCl\u2083 is electron deficient because the central aluminum atom has only six valence electrons (an incomplete octet). According to the Lewis definition, substances that can accept an electron pair are Lewis acids, while substances that can donate an electron pair are Lewis bases.\" \/>\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-statements-regarding-acids-and-bases-is\/\" \/>\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 statements regarding acids and bases is\" \/>\n<meta property=\"og:description\" content=\"The statement "AlCl\u2083 is an electron deficient compound, and can act as a Lewis base" is not correct. AlCl\u2083 is electron deficient because the central aluminum atom has only six valence electrons (an incomplete octet). According to the Lewis definition, substances that can accept an electron pair are Lewis acids, while substances that can donate an electron pair are Lewis bases.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-statements-regarding-acids-and-bases-is\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T04:27:40+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 statements regarding acids and bases is","description":"The statement \"AlCl\u2083 is an electron deficient compound, and can act as a Lewis base\" is not correct. AlCl\u2083 is electron deficient because the central aluminum atom has only six valence electrons (an incomplete octet). According to the Lewis definition, substances that can accept an electron pair are Lewis acids, while substances that can donate an electron pair are Lewis bases.","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-statements-regarding-acids-and-bases-is\/","og_locale":"en_US","og_type":"article","og_title":"Which one among the following statements regarding acids and bases is","og_description":"The statement \"AlCl\u2083 is an electron deficient compound, and can act as a Lewis base\" is not correct. AlCl\u2083 is electron deficient because the central aluminum atom has only six valence electrons (an incomplete octet). According to the Lewis definition, substances that can accept an electron pair are Lewis acids, while substances that can donate an electron pair are Lewis bases.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-statements-regarding-acids-and-bases-is\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T04:27:40+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-statements-regarding-acids-and-bases-is\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-statements-regarding-acids-and-bases-is\/","name":"Which one among the following statements regarding acids and bases is","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T04:27:40+00:00","dateModified":"2025-06-01T04:27:40+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"The statement \"AlCl\u2083 is an electron deficient compound, and can act as a Lewis base\" is not correct. AlCl\u2083 is electron deficient because the central aluminum atom has only six valence electrons (an incomplete octet). According to the Lewis definition, substances that can accept an electron pair are Lewis acids, while substances that can donate an electron pair are Lewis bases.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-statements-regarding-acids-and-bases-is\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-statements-regarding-acids-and-bases-is\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-one-among-the-following-statements-regarding-acids-and-bases-is\/#breadcrumb","itemListElement":[{"@type":"ListItem","position":1,"name":"Home","item":"https:\/\/exam.pscnotes.com\/mcq\/"},{"@type":"ListItem","position":2,"name":"UPSC Geoscientist","item":"https:\/\/exam.pscnotes.com\/mcq\/category\/upsc-geoscientist\/"},{"@type":"ListItem","position":3,"name":"Which one among the following statements regarding acids and bases is"}]},{"@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\/87080","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=87080"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/87080\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=87080"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=87080"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=87080"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}