{"id":400882,"date":"2023-01-11T10:13:25","date_gmt":"2023-01-11T04:43:25","guid":{"rendered":"https:\/\/infinitylearn.com\/surge\/question\/a-following-are-the-transition-metal-ions-of-3d-seriesti4-v2-mn3-cr3-atomic-numbers-ti-22-v-23-mn-25-cr-24-answer-the-followingi-which-ion-is-most-stable-in-an-aqueous-solut-2\/"},"modified":"2025-06-19T20:08:33","modified_gmt":"2025-06-19T14:38:33","slug":"a-following-are-the-transition-metal-ions-of-3d-seriesti4-v2-mn3-cr3-atomic-numbers-ti-22-v-23-mn-25-cr-24-answer-the-followingi-which-ion-is-most-stable-in-an-aqueous-solut-2","status":"publish","type":"questions","link":"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/a-following-are-the-transition-metal-ions-of-3d-seriesti4\/","title":{"rendered":"(a) Following are the transition metal ions of 3d series:Ti4+, V2+, Mn3+, Cr3+ (Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24) Answer the following:(i) Which ion is most stable in an aqueous solution and why?(ii) Which ion is a strong oxidising agent and why?(iii) Which ion is colourless and why?(b) Complete the following equations:(i)\u00a02MnO4\u2212+16H++5S2\u2212\u27f6(ii)\u00a0KMnO4\u27f6\u00a0heat\u00a0"},"content":{"rendered":"","protected":false},"author":1,"template":"","meta":{"_yoast_wpseo_focuskw":"","_yoast_wpseo_title":"","_yoast_wpseo_metadesc":"(a) Following are the transition metal ions of 3d series:Ti4+, V2+, Mn3+, Cr3+ (Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24) Answer the following:(i) Which ion is most stable in an aqueous solution and why?(ii) Which ion is a strong oxidising agent and why?(iii) Which ion is colourless and why?(b) Complete the following equations:(i)\u00a02MnO4\u2212+16H++5S2\u2212\u27f6(ii)\u00a0KMnO4\u27f6\u00a0heat\u00a0","custom_permalink":"question\/chemistry\/a-following-are-the-transition-metal-ions-of-3d-seriesti4\/"},"categories":[],"acf":{"question":"

(a) Following are the transition metal ions of 3d series:
Ti4+<\/sup>, V2+<\/sup>, Mn3+<\/sup>, Cr3+<\/sup> (Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24) Answer the following:
(i) Which ion is most stable in an aqueous solution and why?
(ii) Which ion is a strong oxidising agent and why?
(iii) Which ion is colourless and why?
(b) Complete the following equations:
(i) 2<\/mn>MnO<\/mi>4<\/mn>\u2212<\/mo><\/msubsup>+<\/mo>16<\/mn>H<\/mi>+<\/mo><\/msup>+<\/mo>5<\/mn>S<\/mi>2<\/mn>\u2212<\/mo><\/mrow><\/msup>\u27f6<\/mo><\/math>
(ii) KMnO<\/mi>4<\/mn><\/msub>\u27f6<\/mo> heat <\/mtext><\/mover><\/math><\/p>","options":null,"solution":"

(a)
(i) V2+<\/sup> and Cr3+<\/sup> are most stable as they both have the [Ar]3d3 or \ud835\udc613<\/sup>2g <\/sub>stable electronic configuration.
(ii) Mn3+<\/sup> ions are the strongest oxidising agent in the aqueous solution because after converting to Mn2+<\/sup> they get stable half-filled d5<\/sup> electronic configuration.
(iii) Ti4+<\/sup> has no electron in d orbital. No d-d transition is possible in this case. Therefore, it is colourless.
(b)
(i) 2<\/mn>MnO<\/mi>4<\/mn>\u2212<\/mo><\/msubsup>+<\/mo>16<\/mn>H<\/mi>+<\/mo><\/msup>+<\/mo>5<\/mn>S<\/mi>2<\/mn>\u2212<\/mo><\/mrow><\/msup>\u2192<\/mo>2<\/mn>Mn<\/mi>2<\/mn>+<\/mo><\/mrow><\/msup>+<\/mo>8<\/mn>H<\/mi>2<\/mn><\/msub>O<\/mi>+<\/mo>5<\/mn>S<\/mi><\/math>
(ii) 2<\/mn>KMnO<\/mi>4<\/mn><\/msub>\u27f6<\/mo> heat <\/mtext><\/mover>K<\/mi>2<\/mn><\/msub>MnO<\/mi>4<\/mn><\/msub>+<\/mo>MnO<\/mi>2<\/mn><\/msub>+<\/mo>O<\/mi>2<\/mn><\/msub><\/math><\/p>","subject":""},"yoast_head":"\n(a) Following are the transition metal ions of 3d series:Ti4+, V2+, Mn3+, Cr3+ (Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24) Answer the following:(i) Which ion is most stable in an aqueous solution and why?(ii) Which ion is a strong oxidising agent and why?(iii) Which ion is colourless and why?(b) Complete the following equations:(i)\u00a02MnO4\u2212+16H++5S2\u2212\u27f6(ii)\u00a0KMnO4\u27f6\u00a0heat\u00a0 - Infinity Learn by Sri Chaitanya<\/title>\n<meta name=\"description\" content=\"(a) Following are the transition metal ions of 3d series:Ti4+, V2+, Mn3+, Cr3+ (Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24) Answer the following:(i) Which ion is most stable in an aqueous solution and why?(ii) Which ion is a strong oxidising agent and why?(iii) Which ion is colourless and why?(b) Complete the following equations:(i)\u00a02MnO4\u2212+16H++5S2\u2212\u27f6(ii)\u00a0KMnO4\u27f6\u00a0heat\u00a0\" \/>\n<meta name=\"robots\" content=\"index, follow, max-snippet:-1, max-image-preview:large, max-video-preview:-1\" \/>\n<link rel=\"canonical\" href=\"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/a-following-are-the-transition-metal-ions-of-3d-seriesti4\/\" \/>\n<meta property=\"og:locale\" content=\"en_US\" \/>\n<meta property=\"og:type\" content=\"article\" \/>\n<meta property=\"og:title\" content=\"(a) Following are the transition metal ions of 3d series:Ti4+, V2+, Mn3+, Cr3+ (Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24) Answer the following:(i) Which ion is most stable in an aqueous solution and why?(ii) Which ion is a strong oxidising agent and why?(iii) Which ion is colourless and why?(b) Complete the following equations:(i)\u00a02MnO4\u2212+16H++5S2\u2212\u27f6(ii)\u00a0KMnO4\u27f6\u00a0heat\u00a0 - 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Infinity Learn by Sri Chaitanya","description":"(a) Following are the transition metal ions of 3d series:Ti4+, V2+, Mn3+, Cr3+ (Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24) Answer the following:(i) Which ion is most stable in an aqueous solution and why?(ii) Which ion is a strong oxidising agent and why?(iii) Which ion is colourless and why?(b) Complete the following equations:(i)\u00a02MnO4\u2212+16H++5S2\u2212\u27f6(ii)\u00a0KMnO4\u27f6\u00a0heat\u00a0","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:\/\/infinitylearn.com\/surge\/question\/chemistry\/a-following-are-the-transition-metal-ions-of-3d-seriesti4\/","og_locale":"en_US","og_type":"article","og_title":"(a) Following are the transition metal ions of 3d series:Ti4+, V2+, Mn3+, Cr3+ (Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24) Answer the following:(i) Which ion is most stable in an aqueous solution and why?(ii) Which ion is a strong oxidising agent and why?(iii) Which ion is colourless and why?(b) Complete the following equations:(i)\u00a02MnO4\u2212+16H++5S2\u2212\u27f6(ii)\u00a0KMnO4\u27f6\u00a0heat\u00a0 - Infinity Learn by Sri Chaitanya","og_description":"(a) Following are the transition metal ions of 3d series:Ti4+, V2+, Mn3+, Cr3+ (Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24) Answer the following:(i) Which ion is most stable in an aqueous solution and why?(ii) Which ion is a strong oxidising agent and why?(iii) Which ion is colourless and why?(b) Complete the following equations:(i)\u00a02MnO4\u2212+16H++5S2\u2212\u27f6(ii)\u00a0KMnO4\u27f6\u00a0heat\u00a0","og_url":"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/a-following-are-the-transition-metal-ions-of-3d-seriesti4\/","og_site_name":"Infinity Learn by Sri Chaitanya","article_publisher":"https:\/\/www.facebook.com\/InfinityLearn.SriChaitanya\/","article_modified_time":"2025-06-19T14:38:33+00:00","og_image":[{"width":1920,"height":1008,"url":"https:\/\/infinitylearn.com\/surge\/wp-content\/uploads\/2025\/04\/infinitylearn.jpg","type":"image\/jpeg"}],"twitter_card":"summary_large_image","twitter_site":"@InfinityLearn_","schema":{"@context":"https:\/\/schema.org","@graph":[{"@type":"Organization","@id":"https:\/\/infinitylearn.com\/surge\/#organization","name":"Infinity Learn","url":"https:\/\/infinitylearn.com\/surge\/","sameAs":["https:\/\/www.facebook.com\/InfinityLearn.SriChaitanya\/","https:\/\/www.instagram.com\/infinitylearn_by_srichaitanya\/","https:\/\/www.linkedin.com\/company\/infinity-learn-by-sri-chaitanya\/","https:\/\/www.youtube.com\/c\/InfinityLearnEdu","https:\/\/twitter.com\/InfinityLearn_"],"logo":{"@type":"ImageObject","@id":"https:\/\/infinitylearn.com\/surge\/#logo","inLanguage":"en-US","url":"","contentUrl":"","caption":"Infinity Learn"},"image":{"@id":"https:\/\/infinitylearn.com\/surge\/#logo"}},{"@type":"WebSite","@id":"https:\/\/infinitylearn.com\/surge\/#website","url":"https:\/\/infinitylearn.com\/surge\/","name":"Infinity Learn by Sri Chaitanya","description":"Surge","publisher":{"@id":"https:\/\/infinitylearn.com\/surge\/#organization"},"potentialAction":[{"@type":"SearchAction","target":{"@type":"EntryPoint","urlTemplate":"https:\/\/infinitylearn.com\/surge\/?s={search_term_string}"},"query-input":"required name=search_term_string"}],"inLanguage":"en-US"},{"@type":"WebPage","@id":"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/a-following-are-the-transition-metal-ions-of-3d-seriesti4\/#webpage","url":"https:\/\/infinitylearn.com\/surge\/question\/chemistry\/a-following-are-the-transition-metal-ions-of-3d-seriesti4\/","name":"(a) Following are the transition metal ions of 3d series:Ti4+, V2+, Mn3+, Cr3+ (Atomic numbers: Ti = 22, V = 23, Mn = 25, Cr = 24) Answer the following:(i) Which ion is most stable in an aqueous solution and why?(ii) Which ion is a strong oxidising agent and why?(iii) Which ion is colourless and why?(b) Complete the following equations:(i)\u00a02MnO4\u2212+16H++5S2\u2212\u27f6(ii)\u00a0KMnO4\u27f6\u00a0heat\u00a0 - 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