{"id":169151,"date":"2024-11-19T05:36:16","date_gmt":"2024-11-19T05:36:16","guid":{"rendered":"https:\/\/learnexams.com\/blog\/?p=169151"},"modified":"2024-11-19T05:36:19","modified_gmt":"2024-11-19T05:36:19","slug":"which-of-the-following-indicates-a-strong-base-is-present","status":"publish","type":"post","link":"https:\/\/www.learnexams.com\/blog\/2024\/11\/19\/which-of-the-following-indicates-a-strong-base-is-present\/","title":{"rendered":"Which of the following indicates a strong base is present"},"content":{"rendered":"\n

Which of the following indicates a strong base is present?
A) pH close to 7 B) good conductor of electricity C) low reaction rate D) indicator turns green-blue<\/p>\n\n\n\n

The Correct Answer and Explanation is:<\/mark><\/strong><\/p>\n\n\n\n

The correct answer is B) good conductor of electricity<\/strong>.<\/p>\n\n\n\n

Explanation:<\/h3>\n\n\n\n

A strong base is one that dissociates completely in water, releasing a large number of hydroxide ions (OH\u207b). The presence of these free hydroxide ions in solution is what makes a substance a strong base. Let’s go over each option and explain why “good conductor of electricity” is the correct choice:<\/p>\n\n\n\n

    \n
  1. A) pH close to 7<\/strong>: The pH scale ranges from 0 to 14, where a pH of 7 is considered neutral (neither acidic nor basic). Strong bases, such as sodium hydroxide (NaOH) or potassium hydroxide (KOH), typically have a pH above 7, often in the range of 12 to 14. Therefore, a strong base would not have a pH close to 7, which makes this option incorrect.<\/li>\n\n\n\n
  2. B) good conductor of electricity<\/strong>: One of the key characteristics of strong bases is their ability to dissociate completely into ions when dissolved in water. This dissociation produces hydroxide ions (OH\u207b) and cations (such as Na\u207a or K\u207a), both of which are charged particles capable of carrying an electrical current. The presence of these ions in large quantities makes strong bases excellent conductors of electricity. For example, a 1 M solution of sodium hydroxide (NaOH) will readily conduct electricity due to the high concentration of ions. Therefore, this option correctly indicates the presence of a strong base.<\/li>\n\n\n\n
  3. C) low reaction rate<\/strong>: Strong bases typically react quickly with acids and other substances. For example, a strong base like NaOH reacts immediately with acids to form water and salts in an exothermic reaction. Therefore, a “low reaction rate” would not be characteristic of a strong base, making this option incorrect.<\/li>\n\n\n\n
  4. D) indicator turns green-blue<\/strong>: The color change of an indicator depends on the pH of the solution. For example, phenolphthalein turns pink in basic conditions. A green-blue color could be seen with certain indicators (like bromothymol blue) at a neutral to slightly basic pH, but it does not specifically indicate a strong base. Therefore, this option does not directly indicate the presence of a strong base.<\/li>\n<\/ol>\n\n\n\n

    In conclusion, the ability of a strong base to conduct electricity effectively due to the presence of free ions makes B) good conductor of electricity<\/strong> the correct answer.<\/p>\n","protected":false},"excerpt":{"rendered":"

    Which of the following indicates a strong base is present?A) pH close to 7 B) good conductor of electricity C) low reaction rate D) indicator turns green-blue The Correct Answer and Explanation is: The correct answer is B) good conductor of electricity. Explanation: A strong base is one that dissociates completely in water, releasing a […]<\/p>\n","protected":false},"author":1,"featured_media":0,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"site-sidebar-layout":"default","site-content-layout":"","ast-site-content-layout":"default","site-content-style":"default","site-sidebar-style":"default","ast-global-header-display":"","ast-banner-title-visibility":"","ast-main-header-display":"","ast-hfb-above-header-display":"","ast-hfb-below-header-display":"","ast-hfb-mobile-header-display":"","site-post-title":"","ast-breadcrumbs-content":"","ast-featured-img":"","footer-sml-layout":"","ast-disable-related-posts":"","theme-transparent-header-meta":"","adv-header-id-meta":"","stick-header-meta":"","header-above-stick-meta":"","header-main-stick-meta":"","header-below-stick-meta":"","astra-migrate-meta-layouts":"default","ast-page-background-enabled":"default","ast-page-background-meta":{"desktop":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"ast-content-background-meta":{"desktop":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"tablet":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""},"mobile":{"background-color":"var(--ast-global-color-5)","background-image":"","background-repeat":"repeat","background-position":"center center","background-size":"auto","background-attachment":"scroll","background-type":"","background-media":"","overlay-type":"","overlay-color":"","overlay-opacity":"","overlay-gradient":""}},"footnotes":""},"categories":[25],"tags":[],"class_list":["post-169151","post","type-post","status-publish","format-standard","hentry","category-exams-certification"],"_links":{"self":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/169151","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/users\/1"}],"replies":[{"embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/comments?post=169151"}],"version-history":[{"count":0,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/posts\/169151\/revisions"}],"wp:attachment":[{"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/media?parent=169151"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/categories?post=169151"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.learnexams.com\/blog\/wp-json\/wp\/v2\/tags?post=169151"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}