{"common":{"save":0,"post_id":"9089","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"6975","post_id":"9089","mon_id":"1159892","chapter_id":"1159991","question":"<p data-pm-slice=\"1 1 []\">Cho h\u1ed7n h\u1ee3p các alkane sau: pentane (sôi \u1edf 36oC), heptane (sôi \u1edf 98oC), octane (sôi \u1edf 126oC), nonane (sôi \u1edf 151oC). Có th\u1ec3 tách riêng các ch\u1ea5t \u0111ó b\u1eb1ng cách nào sau \u0111ây?<\/p>","options":["A. K\u1ebft tinh.","B. Ch\u01b0ng c\u1ea5t","C. Th\u0103ng hoa","D. Chi\u1ebft"],"correct":"2","level":"1","hint":"","answer":"<p>\u0110áp án \u0111úng: <strong>B. Ch\u01b0ng c\u1ea5t<\/strong><\/p><p data-end=\"248\" data-start=\"31\">Các alkan trong h\u1ed7n h\u1ee3p có nhi\u1ec7t \u0111\u1ed9 sôi <strong data-end=\"121\" data-start=\"98\">khác nhau khá nhi\u1ec1u<\/strong> (t\u1eeb 36°C \u0111\u1ebfn 151°C), nên có th\u1ec3 <strong data-end=\"205\" data-start=\"154\">tách riêng t\u1eebng ch\u1ea5t b\u1eb1ng ph\u01b0\u01a1ng pháp ch\u01b0ng c\u1ea5t<\/strong> — d\u1ef1a trên s\u1ef1 khác bi\u1ec7t v\u1ec1 nhi\u1ec7t \u0111\u1ed9 sôi.<\/p><p data-end=\"292\" data-start=\"251\"><strong data-end=\"263\" data-start=\"251\">K\u1ebft tinh<\/strong>: th\u01b0\u1eddng dùng cho ch\u1ea5t r\u1eafn.<\/p><p data-end=\"348\" data-start=\"295\"><strong data-end=\"308\" data-start=\"295\">Th\u0103ng hoa<\/strong>: ch\u1ec9 áp d\u1ee5ng cho ch\u1ea5t r\u1eafn d\u1ec5 bay h\u01a1i.<\/p><p data-end=\"438\" data-start=\"351\"><strong data-end=\"360\" data-start=\"351\">Chi\u1ebft<\/strong>: áp d\u1ee5ng cho ch\u1ea5t l\u1ecfng <strong data-end=\"406\" data-start=\"384\">không tan vào nhau<\/strong> (\u1edf \u0111ây các alkan tan l\u1eabn nhau).<\/p><p data-end=\"480\" data-start=\"440\">→ Vì v\u1eady, ch\u1ec9 <strong data-end=\"467\" data-start=\"454\">ch\u01b0ng c\u1ea5t<\/strong> là phù h\u1ee3p.<\/p>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-04-28 19:56:13","option_type":"txt","len":1},{"id":"6976","post_id":"9089","mon_id":"1159892","chapter_id":"1159991","question":"<p data-pm-slice=\"0 0 []\">Ph\u01b0\u01a1ng pháp tách bi\u1ec7t và tinh ch\u1ebf nào sau \u0111ây không \u0111úng v\u1edbi cách làm là:<\/p>","options":["A. Quá trình làm mu\u1ed1i \u0103n t\u1eeb n\u01b0\u1edbc bi\u1ec3n hay làm \u0111\u01b0\u1eddng phèn t\u1eeb n\u01b0\u1edbc mía là ph\u01b0\u01a1ng pháp k\u1ebft tinh.","B. N\u1ea5u r\u01b0\u1ee3u sau khi \u1ee7 men r\u01b0\u1ee3u t\u1eeb nguyên li\u1ec7u nh\u01b0 tinh b\u1ed9t hay xenluloz\u01a1 là ph\u01b0\u01a1ng pháp ch\u01b0ng c\u1ea5t.","C. Khi thu \u0111\u01b0\u1ee3c h\u1ed7n h\u1ee3p g\u1ed3m tinh d\u1ea7u x\u1ea3 n\u1ed5i trên l\u1edbp n\u01b0\u1edbc tách l\u1ea5y tinh d\u1ea7u là ph\u01b0\u01a1ng pháp chi\u1ebft","D. Khi làm tr\u1ee9ng mu\u1ed1i (ngâm tr\u1ee9ng trong dung d\u1ecbch NaCl bão hòa hay ph\u1ee7 tro mu\u1ed1i) là ph\u01b0\u01a1ng pháp k\u1ebft tinh."],"correct":"4","level":"1","hint":"","answer":"<p>\u0110áp án \u0111úng: <strong>D. Khi làm tr\u1ee9ng mu\u1ed1i (ngâm tr\u1ee9ng trong dung d\u1ecbch NaCl bão hòa hay ph\u1ee7 tro mu\u1ed1i) là ph\u01b0\u01a1ng pháp k\u1ebft tinh.<\/strong><\/p><p data-end=\"144\" data-start=\"49\"><strong data-end=\"55\" data-start=\"49\">A.<\/strong> Làm mu\u1ed1i t\u1eeb n\u01b0\u1edbc bi\u1ec3n và làm \u0111\u01b0\u1eddng phèn t\u1eeb n\u01b0\u1edbc mía \u0111\u1ec1u d\u1ef1a trên <strong data-end=\"136\" data-start=\"121\">s\u1ef1 k\u1ebft tinh<\/strong> → \u0111úng.<\/p><p data-end=\"236\" data-start=\"147\"><strong data-end=\"153\" data-start=\"147\">B.<\/strong> N\u1ea5u r\u01b0\u1ee3u là <strong data-end=\"179\" data-start=\"166\">ch\u01b0ng c\u1ea5t<\/strong> \u0111\u1ec3 tách r\u01b0\u1ee3u (có nhi\u1ec7t \u0111\u1ed9 sôi th\u1ea5p) kh\u1ecfi h\u1ed7n h\u1ee3p → \u0111úng.<\/p><p data-end=\"328\" data-start=\"239\"><strong data-end=\"245\" data-start=\"239\">C.<\/strong> Tách tinh d\u1ea7u x\u1ea3 kh\u1ecfi n\u01b0\u1edbc b\u1eb1ng cách g\u1ea1n l\u1edbp tinh d\u1ea7u n\u1ed5i lên là <strong data-end=\"320\" data-start=\"311\">chi\u1ebft<\/strong> → \u0111úng.<\/p><p data-end=\"538\" data-start=\"331\"><strong data-end=\"337\" data-start=\"331\">D.<\/strong> <strong data-end=\"356\" data-start=\"338\">Làm tr\u1ee9ng mu\u1ed1i<\/strong> là quá trình <strong data-end=\"388\" data-start=\"370\">th\u1ea9m th\u1ea5u mu\u1ed1i<\/strong> vào bên trong tr\u1ee9ng qua v\u1ecf — <strong data-end=\"441\" data-start=\"418\">không ph\u1ea3i k\u1ebft tinh<\/strong>. Nó là <strong data-end=\"462\" data-start=\"449\">th\u1ea9m th\u1ea5u<\/strong>, <strong data-end=\"476\" data-is-only-node=\"\" data-start=\"464\">\u01b0\u1edbp mu\u1ed1i<\/strong>, không liên quan \u0111\u1ebfn quá trình t\u1ea1o tinh th\u1ec3 r\u1eafn t\u1eeb dung d\u1ecbch.<\/p>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-04-28 19:58:28","option_type":"txt","len":3},{"id":"6977","post_id":"9089","mon_id":"1159892","chapter_id":"1159991","question":"<p data-pm-slice=\"0 0 []\">Ph\u01b0\u01a1ng pháp chi\u1ebft dùng \u0111\u1ec3 tách bi\u1ec7t các ch\u1ea5t:<\/p>","options":["A. Có nhi\u1ec7t \u0111\u1ed9 sôi khác nhau.","B. Có nguyên t\u1eed kh\u1ed1i khác nhau.","C. Có \u0111\u1ed9 tan khác nhau.","D. Có kh\u1ed1i l\u01b0\u1ee3ng riêng khác nhau."],"correct":"3","level":"1","hint":"","answer":"<p>\u0110áp án \u0111úng: <strong>C. Có \u0111\u1ed9 tan khác nhau.<\/strong><\/p><p><strong data-end=\"91\" data-start=\"70\">Ph\u01b0\u01a1ng pháp chi\u1ebft<\/strong> là dùng \u0111\u1ec3 <strong data-end=\"152\" data-start=\"103\">tách các ch\u1ea5t d\u1ef1a trên s\u1ef1 khác nhau v\u1ec1 \u0111\u1ed9 tan<\/strong> trong hai dung môi không hòa tan vào nhau (ví d\u1ee5: n\u01b0\u1edbc và d\u1ea7u, n\u01b0\u1edbc và x\u0103ng...).<\/p>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-04-28 19:59:57","option_type":"txt","len":3}]}