{"common":{"save":0,"post_id":"7842","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7844","post_id":"7842","mon_id":"1159533","chapter_id":"1159546","question":"<p>D\u1eabn khí CO d\u01b0 qua h\u1ed7n h\u1ee3p b\u1ed9t g\u1ed3m MgO, CuO, Al<span class=\"math-tex\">$_{2}$<\/span>O<span class=\"math-tex\">$_{3}$<\/span> và FeO, nung nóng. Sau khi các ph\u1ea3n \u1ee9ng x\u1ea3y ra hoàn toàn thu \u0111\u01b0\u1ee3c h\u1ed7n h\u1ee3p r\u1eafn Y. S\u1ed1 oxide kim lo\u1ea1i trong Y là<\/p>","options":["<strong>A.<\/strong> 3","<strong>B.<\/strong> 1","<strong>C.<\/strong> 4","<strong>D.<\/strong> 2"],"correct":"4","level":"2","hint":"<p>C\u1ea7n xét xem các oxit trong h\u1ed7n h\u1ee3p có th\u1ec3 b\u1ecb kh\u1eed b\u1edfi CO không<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>D. 2<\/strong><\/span><\/p><p>- Sau ph\u1ea3n \u1ee9ng, <strong>MgO<\/strong> và <strong>Al\u2082O\u2083<\/strong> v\u1eabn còn nguyên vì không b\u1ecb kh\u1eed.<\/p><p><strong>- CuO<\/strong> và <strong>FeO<\/strong> \u0111ã b\u1ecb kh\u1eed thành <strong>Cu<\/strong> và <strong>Fe<\/strong> (không còn d\u01b0\u1edbi d\u1ea1ng oxide).<\/p>","type":"choose","extra_type":"sheep","time":"0","user_id":"127","test":"0","date":"2024-10-16 15:41:22","option_type":"txt","len":0},{"id":"7845","post_id":"7842","mon_id":"1159533","chapter_id":"1159546","question":"<p>\u0110\u1ec3 lo\u1ea1i b\u1ecf kim lo\u1ea1i Cu ra kh\u1ecfi h\u1ed7n h\u1ee3p g\u1ed3m Ag và Cu, ng\u01b0\u1eddi ta ngâm h\u1ed7n h\u1ee3p kim lo\u1ea1i trên vào l\u01b0\u1ee3ng d\u01b0 dung d\u1ecbch <\/p>","options":["<strong>A. <\/strong>AgNO<span class=\"math-tex\">$_{3}$<\/span>","<strong>B.<\/strong> HNO<span class=\"math-tex\">$_{3}$<\/span>","<strong>C.<\/strong> Cu(NO<span class=\"math-tex\">$_{3}$<\/span>)<span class=\"math-tex\">$_{2}$<\/span>","<strong>D.<\/strong> Fe(NO<span class=\"math-tex\">$_{3}$<\/span>)<span class=\"math-tex\">$_{2}$<\/span>"],"correct":"1","level":"2","hint":"<p>\u0110\u1ec3 lo\u1ea1i b\u1ecf <strong>Cu<\/strong> kh\u1ecfi h\u1ed7n h\u1ee3p <strong>Ag và Cu<\/strong>, c\u1ea7n ch\u1ecdn dung d\u1ecbch có th\u1ec3 <strong>hòa tan Cu mà không \u1ea3nh h\u01b0\u1edfng \u0111\u1ebfn Ag<\/strong>.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>A. AgNO<span class=\"math-tex\">$_{3}$<\/span><\/strong><\/span><\/p><p>- Kim lo\u1ea1i Cu \u0111\u1ea9y Ag ra kh\u1ecfi mu\u1ed1i c\u1ee7a nó vì Cu có tính kim lo\u1ea1i m\u1ea1nh h\u01a1n<\/p><p>- PTHH: Cu + 2AgNO<span class=\"math-tex\">$_{3}$<\/span> → Cu(NO<span class=\"math-tex\">$_{3}$<\/span>)<span class=\"math-tex\">$_{2}$<\/span> + 2Ag<\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"127","test":"0","date":"2024-10-16 15:44:48","option_type":"math","len":0},{"id":"7846","post_id":"7842","mon_id":"1159533","chapter_id":"1159546","question":"<p>Gang va\u0300 the\u0301p la\u0300 h\u01a1\u0323p kim cu\u0309a<\/p>","options":["<strong>A.<\/strong> nhôm v\u01a1\u0301i \u0111ô\u0300ng","<strong>B.<\/strong> s\u0103\u0301t v\u01a1\u0301i carbon","<strong>C.<\/strong> carbon v\u01a1\u0301i silicon","<strong>D.<\/strong> s\u0103\u0301t v\u01a1\u0301i nhôm"],"correct":"2","level":"2","hint":"<p>D\u1ef1a vào thành ph\u1ea7n c\u1ee7a gang và thép.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>B. s\u0103\u0301t v\u01a1\u0301i carbon<\/strong><\/span><\/p><p><strong>- Gang<\/strong> và <strong>thép<\/strong> \u0111\u1ec1u là <strong>h\u1ee3p kim c\u1ee7a s\u1eaft (Fe)<\/strong> v\u1edbi m\u1ed9t l\u01b0\u1ee3ng nh\u1ecf <strong>carbon (C)<\/strong> cùng m\u1ed9t s\u1ed1 nguyên t\u1ed1 khác.<\/p><p><strong>- Gang <\/strong>ch\u1ee9a 2-5% carbon còn <strong>Thép <\/strong>ch\u1ee9a <2% carbon.<\/p>","type":"choose","extra_type":"cloud","time":"0","user_id":"127","test":"0","date":"2024-10-16 15:47:59","option_type":"txt","len":0}]}