{"title":"Questão 15 - ENEM 2009","index":15,"discipline":"ciencias-natureza","language":null,"year":2009,"context":"![](https://enem.dev/2009/questions/15/a4e6a5bb-5a91-4e8a-86f2-b4775c56178f.jpg)","files":["https://enem.dev/2009/questions/15/a4e6a5bb-5a91-4e8a-86f2-b4775c56178f.jpg"],"correctAlternative":"B","alternativesIntroduction":"Entre as impurezas metálicas que constam na série apresentada, as que se sedimentam abaixo do ânodo de cobre são","alternatives":[{"letter":"A","text":"Au, Pt, Ag, Zn, Ni e Pb.","file":null,"isCorrect":false},{"letter":"B","text":"Au, Pt e Ag.","file":null,"isCorrect":true},{"letter":"C","text":"Zn, Ni e Pb.","file":null,"isCorrect":false},{"letter":"D","text":"Au e Zn.","file":null,"isCorrect":false},{"letter":"E","text":"Ag e Pb.","file":null,"isCorrect":false}]}