Ôn tập chương 2 - trung bình

Home Lớp 12 Hoá học Lớp 12 - Sách KNTT Bài 7: Ôn tập chương 2: CarbohydrateBài tập trung bình

{"common":{"save":0,"post_id":"10099","level":2,"total":10,"point":10,"point_extra":0},"segment":[{"id":"9037","post_id":"10099","mon_id":"1160346","chapter_id":"1159849","question":"Ba dung d\u1ecbch: glucose, saccharose và fructose có tính ch\u1ea5t chung nào sau \u0111ây?<\/p>","options":["A. \u0110un nóng v\u1edbi Cu(OH)\u2082 có k\u1ebft t\u1ee7a \u0111\u1ecf g\u1ea1ch.","B. Hòa tan Cu(OH)\u2082 cho dung d\u1ecbch màu xanh lam.","C. \u0110\u1ec1u tác d\u1ee5ng v\u1edbi dung AgNO\u2083\/t\u1ea1o k\u1ebft t\u1ee7a Ag.","D. \u0110\u1ec1u tham gia ph\u1ea3n \u1ee9ng th\u1ee7y phân."],"correct":"2","level":"2","hint":"G\u1ee3i ý: Xem ph\u1ea3n \u1ee9ng v\u1edbi Cu(OH)\u2082 — c\u1ea3 3 ch\u1ea5t \u0111\u1ec1u có nhi\u1ec1u nhóm –OH k\u1ec1 nhau nên t\u1ea1o ph\u1ee9c xanh lam.<\/p>","answer":"\u0110áp án \u0111úng: B. Hòa tan Cu(OH)\u2082 cho dung d\u1ecbch màu xanh lam<\/strong><\/span><\/p>Gi\u1ea3i thích:<\/p><ul data-end=\"608\" data-is-last-node=\"\" data-is-only-node=\"\" data-start=\"180\"> <li data-end=\"315\" data-start=\"180\">A sai<\/strong>: Ch\u1ec9 glucose và fructose (có nhóm kh\u1eed) m\u1edbi cho k\u1ebft t\u1ee7a \u0111\u1ecf g\u1ea1ch v\u1edbi Cu(OH)\u2082\/NaOH (ph\u1ea3n \u1ee9ng Fehling), saccharose thì không.<\/p><\/li> <li data-end=\"428\" data-start=\"316\">B \u0111úng<\/strong>: Glucose, fructose, saccharose \u0111\u1ec1u có nhi\u1ec1u nhóm –OH k\u1ec1 nhau → hòa tan Cu(OH)\u2082 t\u1ea1o ph\u1ee9c xanh lam.<\/p><\/li> <li data-end=\"512\" data-start=\"429\">C sai<\/strong>: Ch\u1ec9 glucose và fructose có ph\u1ea3n \u1ee9ng tráng b\u1ea1c, saccharose thì không.<\/p><\/li> <li data-end=\"608\" data-is-last-node=\"\" data-start=\"513\">D sai<\/strong>: Saccharose có th\u1ec3 th\u1ee7y phân, còn glucose và fructose (monosaccharide) thì không.<\/p><\/li><\/ul>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-09-28 14:22:36","option_type":"txt","len":3},{"id":"9038","post_id":"10099","mon_id":"1160346","chapter_id":"1159849","question":"Maltose là m\u1ed9t lo\u1ea1i disaccharide có nhi\u1ec1u trong m\u1ea1ch nha. Công th\u1ee9c phân t\u1eed c\u1ee7a maltose là<\/p>","options":["A. C\u2086H\u2081\u2082O\u2086","B. (C\u2086H\u2081\u2080O\u2085)\u2099","C. C\u2081\u2082H\u2082\u2082O\u2081\u2081","D. C\u2083H\u2086O\u2082"],"correct":"3","level":"2","hint":"G\u1ee3i ý: Maltose là \u0111\u01b0\u1eddng \u0111ôi (disaccharide) g\u1ed3m 2 g\u1ed1c α–glucose.<\/p>","answer":"\u0110áp án \u0111úng: C. C\u2081\u2082H\u2082\u2082O\u2081\u2081<\/strong><\/span><\/p>Gi\u1ea3i thích:<\/p><ul data-end=\"449\" data-is-last-node=\"\" data-is-only-node=\"\" data-start=\"114\"> <li data-end=\"215\" data-start=\"114\">C \u0111úng<\/strong>: Công th\u1ee9c phân t\u1eed c\u1ee7a các disaccharide nh\u01b0 maltose, saccharose, lactose là C\u2081\u2082H\u2082\u2082O\u2081\u2081.<\/p><\/li> <li data-end=\"291\" data-start=\"216\">A sai<\/strong>: C\u2086H\u2081\u2082O\u2086 là công th\u1ee9c c\u1ee7a monosaccharide (glucose, fructose).<\/p><\/li> <li data-end=\"372\" data-start=\"292\">B sai<\/strong>: (C\u2086H\u2081\u2080O\u2085)\u2099 là công th\u1ee9c c\u1ee7a polysaccharide (tinh b\u1ed9t, cellulose).<\/p><\/li> <li data-end=\"449\" data-is-last-node=\"\" data-start=\"373\">D sai<\/strong>: C\u2083H\u2086O\u2082 là công th\u1ee9c c\u1ee7a acid lactic, không ph\u1ea3i carbohydrate.<\/p><\/li><\/ul>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-09-28 14:23:07","option_type":"txt","len":1},{"id":"9039","post_id":"10099","mon_id":"1160346","chapter_id":"1159849","question":"Trong các dung d\u1ecbch sau: fructose, glycerol, saccharose, ethanol và tinh b\u1ed9t. S\u1ed1 dung d\u1ecbch có th\u1ec3 hòa tan \u0111\u01b0\u1ee3c Cu(OH)\u2082 \u1edf nhi\u1ec7t \u0111\u1ed9 th\u01b0\u1eddng là<\/p>","options":["A. 4","B. 5","C. 3","D. 1"],"correct":"1","level":"2","hint":"G\u1ee3i ý: Mu\u1ed1n hòa tan \u0111\u01b0\u1ee3c Cu(OH)\u2082 \u1edf nhi\u1ec7t \u0111\u1ed9 th\u01b0\u1eddng c\u1ea7n có ≥ 2 nhóm –OH li\u1ec1n k\u1ec1<\/strong> (\u0111a ch\u1ee9c r\u01b0\u1ee3u).<\/p>","answer":"\u0110áp án \u0111úng: A. 1<\/span><\/strong><\/p>Xét t\u1eebng ch\u1ea5t:<\/strong><\/p><ul data-end=\"398\" data-start=\"123\"> <li data-end=\"175\" data-start=\"123\">Fructose<\/strong>: có nhi\u1ec1u –OH k\u1ec1 → hòa tan Cu(OH)\u2082.<\/p><\/li> <li data-end=\"236\" data-start=\"176\">Glycerol (C\u2083H\u2085(OH)\u2083)<\/strong>: có 3 –OH k\u1ec1 → hòa tan Cu(OH)\u2082.<\/p><\/li> <li data-end=\"288\" data-start=\"237\">Saccharose<\/strong>: nhi\u1ec1u –OH k\u1ec1 → hòa tan Cu(OH)\u2082.<\/p><\/li> <li data-end=\"343\" data-start=\"289\">Ethanol<\/strong>: ch\u1ec9 có 1 –OH → không hòa tan Cu(OH)\u2082.<\/p><\/li> <li data-end=\"398\" data-start=\"344\">Tinh b\u1ed9t<\/strong>: có nhi\u1ec1u –OH → c\u0169ng hòa tan Cu(OH)\u2082.<\/p><\/li><\/ul>","type":"choose","extra_type":"classic","user_id":"139","test":"0","date":"2025-09-28 14:24:01","option_type":"txt","len":0}]}