{"id":86165,"date":"2025-06-01T03:39:16","date_gmt":"2025-06-01T03:39:16","guid":{"rendered":"https:\/\/exam.pscnotes.com\/mcq\/?p=86165"},"modified":"2025-06-01T03:39:16","modified_gmt":"2025-06-01T03:39:16","slug":"which-of-the-following-statements-about-universal-indicator-is-are-tru","status":"publish","type":"post","link":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-universal-indicator-is-are-tru\/","title":{"rendered":"Which of the following statements about universal indicator is\/are tru"},"content":{"rendered":"<p>Which of the following statements about universal indicator is\/are true ?<\/p>\n<ul>\n<li>1. It is a mixture of several indicators.<\/li>\n<li>2. It shows different colours at different concentrations of hydrogen ions in solution.<\/li>\n<li>3. It helps to determine the strength of given acid and base in titration.<\/li>\n<\/ul>\n<p>Select the correct answer using the code given below :<\/p>\n<p>[amp_mcq option1=&#8221;1 only&#8221; option2=&#8221;1 and 2 only&#8221; option3=&#8221;2 and 3 only&#8221; option4=&#8221;1, 2 and 3&#8243; correct=&#8221;option2&#8243;]<\/p>\n<div class=\"psc-box-pyq-exam-year-detail\">\n<div class=\"pyq-exam\">\n<div class=\"psc-heading\">This question was previously asked in<\/div>\n<div class=\"psc-title line-ellipsis\">UPSC CDS-2 &#8211; 2021<\/div>\n<\/div>\n<div class=\"pyq-exam-psc-buttons\"><a href=\"\/pyq\/pyq-upsc-cds-2-2021.pdf\" target=\"_blank\" class=\"psc-pdf-button\" rel=\"noopener\">Download PDF<\/a><a href=\"\/pyq-upsc-cds-2-2021\" target=\"_blank\" class=\"psc-attempt-button\" rel=\"noopener\">Attempt Online<\/a><\/div>\n<\/div>\n<section id=\"pyq-correct-answer\">\nStatement 1: A universal indicator is indeed a mixture of several different indicators (such as thymol blue, methyl red, bromothymol blue, thymol blue) to provide colour changes over a wide range of pH values. This statement is true.<br \/>\nStatement 2: The colour of a universal indicator changes gradually with the concentration of hydrogen ions (or hydronium ions) in the solution, covering the full pH scale (typically from pH 0-14). Different colours correspond to different pH values, which reflect different hydrogen ion concentrations. This statement is true.<br \/>\nStatement 3: While a universal indicator shows the pH throughout a titration, providing insight into how the pH changes with the addition of titrant (related to strength), it does not typically help determine the *strength* in the sense of quantitative concentration determination or finding a precise endpoint for volumetric analysis in titration. Specific indicators with sharp colour changes near the equivalence point are used for accurate titration. Universal indicator gives an approximate pH, which *can* give a general idea of strength (e.g., a strong acid causes a lower pH than a weak acid at the same concentration), but it&#8217;s not its primary use in quantitative titration analysis. Therefore, this statement is less accurate or potentially misleading in the context of standard titration procedures for determining strength (concentration). Considering the options, and the definite truth of statements 1 and 2, option B (1 and 2 only) is the most likely correct answer if statement 3 is considered not entirely true or imprecise for typical quantitative strength determination in titration.<br \/>\n<\/section>\n<section id=\"pyq-key-points\">\n&#8211; Universal indicator is a blend of multiple indicators.<br \/>\n&#8211; It provides a spectrum of colours corresponding to different pH levels.<br \/>\n&#8211; It is useful for estimating the pH of a solution but less so for precise titration endpoints.<br \/>\n<\/section>\n<section id=\"pyq-additional-information\">\nThe pH scale is a measure of the acidity or basicity of a solution, defined by the concentration of hydrogen ions. Strong acids\/bases dissociate\/ionise almost completely, leading to high\/low H+ concentrations (low\/high pH). Weak acids\/bases only partially dissociate\/ionise. Universal indicator colours range typically from red (strongly acidic) through orange, yellow, green (neutral), blue, indigo to violet (strongly alkaline).<br \/>\n<\/section>\n","protected":false},"excerpt":{"rendered":"<p>Which of the following statements about universal indicator is\/are true ? 1. It is a mixture of several indicators. 2. It shows different colours at different concentrations of hydrogen ions in solution. 3. It helps to determine the strength of given acid and base in titration. Select the correct answer using the code given below &#8230; <\/p>\n<p class=\"read-more-container\"><a title=\"Which of the following statements about universal indicator is\/are tru\" class=\"read-more button\" href=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-universal-indicator-is-are-tru\/#more-86165\">Detailed Solution<span class=\"screen-reader-text\">Which of the following statements about universal indicator is\/are tru<\/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":[1110,1202,1096],"class_list":["post-86165","post","type-post","status-publish","format-standard","hentry","category-upsc-cds-2","tag-1110","tag-acid-base-and-salt","tag-chemistry","no-featured-image-padding"],"yoast_head":"<!-- This site is optimized with the Yoast SEO Premium plugin v22.2 (Yoast SEO v23.3) - https:\/\/yoast.com\/wordpress\/plugins\/seo\/ -->\n<title>Which of the following statements about universal indicator is\/are tru<\/title>\n<meta name=\"description\" content=\"Statement 1: A universal indicator is indeed a mixture of several different indicators (such as thymol blue, methyl red, bromothymol blue, thymol blue) to provide colour changes over a wide range of pH values. This statement is true. Statement 2: The colour of a universal indicator changes gradually with the concentration of hydrogen ions (or hydronium ions) in the solution, covering the full pH scale (typically from pH 0-14). Different colours correspond to different pH values, which reflect different hydrogen ion concentrations. This statement is true. Statement 3: While a universal indicator shows the pH throughout a titration, providing insight into how the pH changes with the addition of titrant (related to strength), it does not typically help determine the *strength* in the sense of quantitative concentration determination or finding a precise endpoint for volumetric analysis in titration. Specific indicators with sharp colour changes near the equivalence point are used for accurate titration. Universal indicator gives an approximate pH, which *can* give a general idea of strength (e.g., a strong acid causes a lower pH than a weak acid at the same concentration), but it&#039;s not its primary use in quantitative titration analysis. Therefore, this statement is less accurate or potentially misleading in the context of standard titration procedures for determining strength (concentration). Considering the options, and the definite truth of statements 1 and 2, option B (1 and 2 only) is the most likely correct answer if statement 3 is considered not entirely true or imprecise for typical quantitative strength determination in titration. - Universal indicator is a blend of multiple indicators. - It provides a spectrum of colours corresponding to different pH levels. - It is useful for estimating the pH of a solution but less so for precise titration endpoints.\" \/>\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-of-the-following-statements-about-universal-indicator-is-are-tru\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"Which of the following statements about universal indicator is\/are tru\" \/>\n<meta property=\"og:description\" content=\"Statement 1: A universal indicator is indeed a mixture of several different indicators (such as thymol blue, methyl red, bromothymol blue, thymol blue) to provide colour changes over a wide range of pH values. This statement is true. Statement 2: The colour of a universal indicator changes gradually with the concentration of hydrogen ions (or hydronium ions) in the solution, covering the full pH scale (typically from pH 0-14). Different colours correspond to different pH values, which reflect different hydrogen ion concentrations. This statement is true. Statement 3: While a universal indicator shows the pH throughout a titration, providing insight into how the pH changes with the addition of titrant (related to strength), it does not typically help determine the *strength* in the sense of quantitative concentration determination or finding a precise endpoint for volumetric analysis in titration. Specific indicators with sharp colour changes near the equivalence point are used for accurate titration. Universal indicator gives an approximate pH, which *can* give a general idea of strength (e.g., a strong acid causes a lower pH than a weak acid at the same concentration), but it&#039;s not its primary use in quantitative titration analysis. Therefore, this statement is less accurate or potentially misleading in the context of standard titration procedures for determining strength (concentration). Considering the options, and the definite truth of statements 1 and 2, option B (1 and 2 only) is the most likely correct answer if statement 3 is considered not entirely true or imprecise for typical quantitative strength determination in titration. - Universal indicator is a blend of multiple indicators. - It provides a spectrum of colours corresponding to different pH levels. - It is useful for estimating the pH of a solution but less so for precise titration endpoints.\" \/>\n<meta property=\"og:url\" content=\"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-universal-indicator-is-are-tru\/\" \/>\n<meta property=\"og:site_name\" content=\"MCQ and Quiz for Exams\" \/>\n<meta property=\"article:published_time\" content=\"2025-06-01T03:39:16+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=\"2 minutes\" \/>\n<!-- \/ Yoast SEO Premium plugin. -->","yoast_head_json":{"title":"Which of the following statements about universal indicator is\/are tru","description":"Statement 1: A universal indicator is indeed a mixture of several different indicators (such as thymol blue, methyl red, bromothymol blue, thymol blue) to provide colour changes over a wide range of pH values. This statement is true. Statement 2: The colour of a universal indicator changes gradually with the concentration of hydrogen ions (or hydronium ions) in the solution, covering the full pH scale (typically from pH 0-14). Different colours correspond to different pH values, which reflect different hydrogen ion concentrations. This statement is true. Statement 3: While a universal indicator shows the pH throughout a titration, providing insight into how the pH changes with the addition of titrant (related to strength), it does not typically help determine the *strength* in the sense of quantitative concentration determination or finding a precise endpoint for volumetric analysis in titration. Specific indicators with sharp colour changes near the equivalence point are used for accurate titration. Universal indicator gives an approximate pH, which *can* give a general idea of strength (e.g., a strong acid causes a lower pH than a weak acid at the same concentration), but it's not its primary use in quantitative titration analysis. Therefore, this statement is less accurate or potentially misleading in the context of standard titration procedures for determining strength (concentration). Considering the options, and the definite truth of statements 1 and 2, option B (1 and 2 only) is the most likely correct answer if statement 3 is considered not entirely true or imprecise for typical quantitative strength determination in titration. - Universal indicator is a blend of multiple indicators. - It provides a spectrum of colours corresponding to different pH levels. - It is useful for estimating the pH of a solution but less so for precise titration endpoints.","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-of-the-following-statements-about-universal-indicator-is-are-tru\/","og_locale":"en_US","og_type":"article","og_title":"Which of the following statements about universal indicator is\/are tru","og_description":"Statement 1: A universal indicator is indeed a mixture of several different indicators (such as thymol blue, methyl red, bromothymol blue, thymol blue) to provide colour changes over a wide range of pH values. This statement is true. Statement 2: The colour of a universal indicator changes gradually with the concentration of hydrogen ions (or hydronium ions) in the solution, covering the full pH scale (typically from pH 0-14). Different colours correspond to different pH values, which reflect different hydrogen ion concentrations. This statement is true. Statement 3: While a universal indicator shows the pH throughout a titration, providing insight into how the pH changes with the addition of titrant (related to strength), it does not typically help determine the *strength* in the sense of quantitative concentration determination or finding a precise endpoint for volumetric analysis in titration. Specific indicators with sharp colour changes near the equivalence point are used for accurate titration. Universal indicator gives an approximate pH, which *can* give a general idea of strength (e.g., a strong acid causes a lower pH than a weak acid at the same concentration), but it's not its primary use in quantitative titration analysis. Therefore, this statement is less accurate or potentially misleading in the context of standard titration procedures for determining strength (concentration). Considering the options, and the definite truth of statements 1 and 2, option B (1 and 2 only) is the most likely correct answer if statement 3 is considered not entirely true or imprecise for typical quantitative strength determination in titration. - Universal indicator is a blend of multiple indicators. - It provides a spectrum of colours corresponding to different pH levels. - It is useful for estimating the pH of a solution but less so for precise titration endpoints.","og_url":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-universal-indicator-is-are-tru\/","og_site_name":"MCQ and Quiz for Exams","article_published_time":"2025-06-01T03:39:16+00:00","author":"rawan239","twitter_card":"summary_large_image","twitter_misc":{"Written by":"rawan239","Est. reading time":"2 minutes"},"schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"WebPage","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-universal-indicator-is-are-tru\/","url":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-universal-indicator-is-are-tru\/","name":"Which of the following statements about universal indicator is\/are tru","isPartOf":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#website"},"datePublished":"2025-06-01T03:39:16+00:00","dateModified":"2025-06-01T03:39:16+00:00","author":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/#\/schema\/person\/5807dafeb27d2ec82344d6cbd6c3d209"},"description":"Statement 1: A universal indicator is indeed a mixture of several different indicators (such as thymol blue, methyl red, bromothymol blue, thymol blue) to provide colour changes over a wide range of pH values. This statement is true. Statement 2: The colour of a universal indicator changes gradually with the concentration of hydrogen ions (or hydronium ions) in the solution, covering the full pH scale (typically from pH 0-14). Different colours correspond to different pH values, which reflect different hydrogen ion concentrations. This statement is true. Statement 3: While a universal indicator shows the pH throughout a titration, providing insight into how the pH changes with the addition of titrant (related to strength), it does not typically help determine the *strength* in the sense of quantitative concentration determination or finding a precise endpoint for volumetric analysis in titration. Specific indicators with sharp colour changes near the equivalence point are used for accurate titration. Universal indicator gives an approximate pH, which *can* give a general idea of strength (e.g., a strong acid causes a lower pH than a weak acid at the same concentration), but it's not its primary use in quantitative titration analysis. Therefore, this statement is less accurate or potentially misleading in the context of standard titration procedures for determining strength (concentration). Considering the options, and the definite truth of statements 1 and 2, option B (1 and 2 only) is the most likely correct answer if statement 3 is considered not entirely true or imprecise for typical quantitative strength determination in titration. - Universal indicator is a blend of multiple indicators. - It provides a spectrum of colours corresponding to different pH levels. - It is useful for estimating the pH of a solution but less so for precise titration endpoints.","breadcrumb":{"@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-universal-indicator-is-are-tru\/#breadcrumb"},"inLanguage":"en-US","potentialAction":[{"@type":"ReadAction","target":["https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-universal-indicator-is-are-tru\/"]}]},{"@type":"BreadcrumbList","@id":"https:\/\/exam.pscnotes.com\/mcq\/which-of-the-following-statements-about-universal-indicator-is-are-tru\/#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 of the following statements about universal indicator is\/are tru"}]},{"@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\/86165","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=86165"}],"version-history":[{"count":0,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/posts\/86165\/revisions"}],"wp:attachment":[{"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/media?parent=86165"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/categories?post=86165"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/exam.pscnotes.com\/mcq\/wp-json\/wp\/v2\/tags?post=86165"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}