{"id":130839,"date":"2023-02-14T12:46:18","date_gmt":"2023-02-14T07:16:18","guid":{"rendered":"https:\/\/www.mapsofindia.com\/my-india\/?p=130839"},"modified":"2023-02-14T12:46:18","modified_gmt":"2023-02-14T07:16:18","slug":"answer-the-following","status":"publish","type":"post","link":"https:\/\/www.mapsofindia.com\/my-india\/education\/answer-the-following","title":{"rendered":"Answer the following:"},"content":{"rendered":"<h2>Question 40:Answer the following:<\/h2>\n<h3>a. Why are all copper halides known except that copper iodide?<br \/>\nb. Why is the Eo<br \/>\n(V3+\/V2+) value for vanadium comparatively low?<br \/>\nc. Why HCl should not be used for potassium permanganate titrations?<br \/>\nd. Explain the observation, at the end of each period, there is a slight<br \/>\nincrease in the atomic radius of d block elements.<br \/>\ne. What is the effect of pH on dichromate ion solution?<\/h3>\n<h4>\nThe correct answer is -.a. Cu2+ oxidizes iodide ion to iodine. (1)<br \/>\nb. The low value for V is related to the stability of V2+ (half-filled t2g level) (1)<br \/>\nc. Permanganate titrations in presence of hydrochloric acid are unsatisfactory<br \/>\nsince hydrochloric acid is oxidised to chlorine.<br \/>\nd. The d orbital is full with ten electrons and shield the electrons present in the<br \/>\nhigher s-orbital to a greater extent resulting in increase in size.<br \/>\ne. The chromates and dichromates are interconvertible in aqueous solution<br \/>\ndepending upon pH of the solution. Increasing the pH (in basic solution)of<br \/>\ndichromate ions a colour change from orange to yellow is observed as<br \/>\ndichromate ions change to chromate ions.<\/h4>\n","protected":false},"excerpt":{"rendered":"<p>Question 40:Answer the following: a. Why are all copper halides known except that copper iodide? b. Why is the Eo (V3+\/V2+) value for vanadium comparatively low? c. Why HCl should not be used for potassium permanganate titrations? d. Explain the observation, at the end of each period, there is a slight increase in the atomic [&hellip;]<\/p>\n","protected":false},"author":21830,"featured_media":130487,"comment_status":"closed","ping_status":"closed","sticky":false,"template":"","format":"standard","meta":{"footnotes":""},"categories":[7],"tags":[],"class_list":{"0":"post-130839","1":"post","2":"type-post","3":"status-publish","4":"format-standard","5":"has-post-thumbnail","7":"category-education"},"aioseo_notices":[],"_links":{"self":[{"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/posts\/130839","targetHints":{"allow":["GET"]}}],"collection":[{"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/posts"}],"about":[{"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/types\/post"}],"author":[{"embeddable":true,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/users\/21830"}],"replies":[{"embeddable":true,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/comments?post=130839"}],"version-history":[{"count":2,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/posts\/130839\/revisions"}],"predecessor-version":[{"id":130843,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/posts\/130839\/revisions\/130843"}],"wp:featuredmedia":[{"embeddable":true,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/media\/130487"}],"wp:attachment":[{"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/media?parent=130839"}],"wp:term":[{"taxonomy":"category","embeddable":true,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/categories?post=130839"},{"taxonomy":"post_tag","embeddable":true,"href":"https:\/\/www.mapsofindia.com\/my-india\/wp-json\/wp\/v2\/tags?post=130839"}],"curies":[{"name":"wp","href":"https:\/\/api.w.org\/{rel}","templated":true}]}}