Archives

{“questions”:{“61lnz”:{“id”:”61lnz”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nProf.san 2003\r\n\r\n \r\nUna sostanza si ossida quando:\r\n“,”desc”:””,”hint”:””,”answers”:{“2ccwj”:{“id”:”2ccwj”,”image”:””,”imageId”:””,”title”:”A) acquista elettroni”},”tgais”:{“id”:”tgais”,”image”:””,”imageId”:””,”title”:”B) cede protoni”},”393kv”:{“id”:”393kv”,”image”:””,”imageId”:””,”title”:”C) cede elettroni”,”isCorrect”:”1″},”7iu26″:{“id”:”7iu26″,”image”:””,”imageId”:””,”title”:”D) acquista neutroni”},”bye5e”:{“id”:”bye5e”,”image”:””,”imageId”:””,”title”:”E) perde fotoni”}}}},”results”:{“5x2bz”:{“id”:”5x2bz”,”title”:””,”image”:””,”imageId”:””,”min”:”0″,”max”:”1″,”desc”:” In generale diciamo che si ossidano gli elementi che aumentano il proprio …

{“questions”:{“jo6rr”:{“id”:”jo6rr”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nProf.san 2013\r\n\r\n \r\nQuando, in una reazione di ossido-riduzione, una specie chimica perde elettroni:\r\n“,”desc”:””,”hint”:””,”answers”:{“d2v6d”:{“id”:”d2v6d”,”image”:””,”imageId”:””,”title”:”A) si ossida e si riduce contemporaneamente “},”dhodx”:{“id”:”dhodx”,”image”:””,”imageId”:””,”title”:”B) si riduce, quindi \u00e8 l’agente ossidante perch\u00e9 ossida l’altra …

{“questions”:{“nokz5”:{“id”:”nokz5″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nProf.san 2016\r\n\r\n \r\nNella seguente reazione: 2 NaCl + Br2 \u2192 Cl2 + 2 NaBr:\r\n“,”desc”:””,”hint”:””,”answers”:{“3590y”:{“id”:”3590y”,”image”:””,”imageId”:””,”title”:”A) il cloro si riduce e il bromo si ossida “},”a5czs”:{“id”:”a5czs”,”image”:””,”imageId”:””,”title”:”B) il cloro si ossida e …

{“questions”:{“ia3zz”:{“id”:”ia3zz”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nProf.san 2009 \r\n\r\n \r\nNelle reazioni di ossidoriduzione avvengono sempre trasferimenti di:\r\n“,”desc”:””,”hint”:””,”answers”:{“05jtm”:{“id”:”05jtm”,”image”:””,”imageId”:””,”title”:”A) neutroni”},”jbai1″:{“id”:”jbai1″,”image”:””,”imageId”:””,”title”:”B) neutrini”},”992cd”:{“id”:”992cd”,”image”:””,”imageId”:””,”title”:”C) protoni”},”f2k3g”:{“id”:”f2k3g”,”image”:””,”imageId”:””,”title”:”D) elettroni”,”isCorrect”:”1″},”6lo3q”:{“id”:”6lo3q”,”image”:””,”imageId”:””,”title”:”E) calore”}}}},”results”:{“zikqx”:{“id”:”zikqx”,”title”:””,”image”:””,”imageId”:””,”min”:”0″,”max”:”1″,”desc”:” In generale diciamo che si ossidano gli elementi che aumentano il proprio numero …

{“questions”:{“h2cs1”:{“id”:”h2cs1″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nMedicina 2017\r\n\r\n \r\nNella reazione2 HNO3 + 3 H2S \u2192 2 NO + 3 S + 4 H2O:\r\n“,”desc”:””,”hint”:””,”answers”:{“6vhdg”:{“id”:”6vhdg”,”image”:””,”imageId”:””,”title”:”A) l’azoto si ossida mentre lo zolfo si riduce “},”1li77”:{“id”:”1li77″,”image”:””,”imageId”:””,”title”:”B) l’azoto si riduce …

{“questions”:{“fif58”:{“id”:”fif58″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nVeterinaria 2016\r\n\r\n \r\nL’anione dicromato CrO42\u2013 si trasforma nel catione Cr3+ e in questa reazione l’atomo di Cr:\r\n“,”desc”:””,”hint”:””,”answers”:{“07vxe”:{“id”:”07vxe”,”image”:””,”imageId”:””,”title”:”A) passa da numero di ossidazione +4 a +3 e si riduce”},”w3wxb”:{“id”:”w3wxb”,”image”:””,”imageId”:””,”title”:”B) passa …

{“questions”:{“n7otq”:{“id”:”n7otq”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nMedicina 2016 \r\n\r\n \r\nQuale elemento si riduce nella reazione Zn + FeCl2 \u21c4 ZnCl2 + Fe ?\r\n“,”desc”:””,”hint”:””,”answers”:{“t8zlg”:{“id”:”t8zlg”,”image”:””,”imageId”:””,”title”:”A) Nessun elemento varia il proprio stato di ossidazione”},”pid1s”:{“id”:”pid1s”,”image”:””,”imageId”:””,”title”:”B) Lo zinco metallico”},”cu2h1″:{“id”:”cu2h1″,”image”:””,”imageId”:””,”title”:”C) Il …

{“questions”:{“4i2gj”:{“id”:”4i2gj”,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nVeterinaria 2015 \r\n\r\n\r\nData la seguente reazione di ossidoriduzione tra ioni ossalato (C2O42\u2013) e ioni permanganato (MnO4\u2013) in soluzione acquosa acida:5 C2O42-(aq) + 2 MnO4–(aq) + 16 H+(aq) \u279d 10 …

{“questions”:{“uukd4”:{“id”:”uukd4″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nVeterinaria 2014\r\n\r\n Quale\/i delle seguenti reazioni \u00e8\/sono delle ossidoriduzioni?1. Cl2(aq) + 2Br\u2013(aq) \u2192 Br2(aq) + 2Cl\u2013(aq)2. Cl2(aq) + H2O(l) \u2192 H+Cl\u2013(aq) + HOCl(aq)3. H+Cl\u2013(aq) + H2O(l) \u2192 H3O+(aq) + …

{“questions”:{“5d2l8”:{“id”:”5d2l8″,”mediaType”:”image”,”answerType”:”text”,”imageCredit”:””,”image”:””,”imageId”:””,”video”:””,”imagePlaceholder”:””,”imagePlaceholderId”:””,”title”:” \r\nMedicina 2014\r\n\r\n \r\nQuante delle seguenti reazioni sono solo ossidazioni (Ox), quante solo riduzioni (Red),\r\nquante ossidoriduzioni (Redox)?\r\n2H+ + 2e\u2012 \u2192 H2\r\nAg+ + Cl\u2012 \u2192 AgCl\r\nCu+ \u2192 Cu2+ + e\u2012\r\n2Cu+ \u2192 …