{"common":{"save":0,"post_id":"8067","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8835","post_id":"8067","mon_id":"1159533","chapter_id":"1159587","question":"<p>Cho s\u01a1 \u0111\u1ed3 chuy\u1ec3n hóa sau: Tinh b\u1ed9t → X → Y → Z → ethyl acetate. Các ch\u1ea5t Y, Z trong s\u01a1 \u0111\u1ed3 trên l\u1ea7n l\u01b0\u1ee3t là:<\/p>","options":["<strong> A.<\/strong> C<span class=\"math-tex\">$_{2}$<\/span>H<span class=\"math-tex\">$_{5}$<\/span>OH, CH<span class=\"math-tex\">$_{3}$<\/span>COOH","<strong>B. <\/strong>CH<span class=\"math-tex\">$_{3}$<\/span>COOH, CH<span class=\"math-tex\">$_{3}$<\/span>OH","<strong>C. <\/strong>CH<span class=\"math-tex\">$_{3}$<\/span>COOH, C<span class=\"math-tex\">$_{2}$<\/span>H<span class=\"math-tex\">$_{5}$<\/span>OH","<strong>D.<\/strong> C<span class=\"math-tex\">$_{2}$<\/span>H4, CH<span class=\"math-tex\">$_{3}$<\/span>COOH"],"correct":"1","level":"3","hint":"<p>Ethyl acetate là m\u1ed9t este \u0111\u01b0\u1ee3c t\u1ea1o thành t\u1eeb ph\u1ea3n \u1ee9ng gi\u1eefa m\u1ed9t axit carboxylic và m\u1ed9t r\u01b0\u1ee3u. Hãy xem xét quá trình chuy\u1ec3n hóa t\u1eeb tinh b\u1ed9t và xác \u0111\u1ecbnh ch\u1ea5t nào là ti\u1ec1n ch\u1ea5t c\u1ee7a các h\u1ee3p ch\u1ea5t c\u1ea7n thi\u1ebft \u0111\u1ec3 t\u1ea1o este.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong> A. C<span class=\"math-tex\">$_{2}$<\/span>H<span class=\"math-tex\">$_{5}$<\/span>OH, CH<span class=\"math-tex\">$_{3}$<\/span>COOH<\/strong><\/span><\/p><p><span style=\"color:#16a085;\"><\/span><strong>- Tinh b\u1ed9t → X<\/strong>: Tinh b\u1ed9t th\u1ee7y phân trong môi tr\u01b0\u1eddng axit ho\u1eb7c enzym, t\u1ea1o ra glucose.<\/p><p><strong>- X → Y (C2H5OH): <\/strong>Glucose tr\u1ea3i qua quá trình <strong>lên men r\u01b0\u1ee3u<\/strong>, t\u1ea1o ra <strong>ethanol (<\/strong><span style=\"color:#16a085;\"><strong>C<span class=\"math-tex\">$_{2}$<\/span>H<span class=\"math-tex\">$_{5}$<\/span>OH<\/strong><\/span><strong>)<\/strong> và khí CO<span style=\"color:#16a085;\"><strong><span class=\"math-tex\">$_{2}$<\/span><\/strong><\/span>.<\/p><p><strong>- Y → Z (CH<\/strong><span style=\"color:#16a085;\"><strong><span class=\"math-tex\">$_{3}$<\/span><\/strong><\/span><strong>COOH): <\/strong>Ethanol (<span style=\"color:#16a085;\"><strong>C<span class=\"math-tex\">$_{2}$<\/span>H<span class=\"math-tex\">$_{5}$<\/span>OH<\/strong><\/span>) b\u1ecb oxy hóa trong \u0111i\u1ec1u ki\u1ec7n có xúc tác (nh\u01b0 vi khu\u1ea9n axetic) \u0111\u1ec3 t\u1ea1o thành <strong>axit axetic (CH<\/strong><span style=\"color:#16a085;\"><strong><span class=\"math-tex\">$_{3}$<\/span><\/strong><\/span><strong>COOH).<\/strong><\/p><p><strong>- Z → Ethyl acetate: <\/strong>Axit axetic (<strong>CH<\/strong><span style=\"color:#16a085;\"><strong><span class=\"math-tex\">$_{3}$<\/span><\/strong><\/span><strong>COOH<\/strong>) ph\u1ea3n \u1ee9ng v\u1edbi ethanol (<span style=\"color:#16a085;\"><strong>C<span class=\"math-tex\">$_{2}$<\/span>H<span class=\"math-tex\">$_{5}$<\/span>OH<\/strong><\/span>) trong \u0111i\u1ec1u ki\u1ec7n xúc tác axit, t\u1ea1o ra <strong>ethyl acetate (C<\/strong><span style=\"color:#16a085;\"><strong><span class=\"math-tex\">$_{4}$<\/span><\/strong><\/span><strong>H<\/strong><span style=\"color:#16a085;\"><strong><span class=\"math-tex\">$_{8}$<\/span><\/strong><\/span><strong>O<\/strong><span style=\"color:#16a085;\"><strong><span class=\"math-tex\">$_{2}$<\/span><\/strong><\/span><strong>)<\/strong> và n\u01b0\u1edbc.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-11-25 21:27:20","option_type":"math","len":0},{"id":"8876","post_id":"8067","mon_id":"1159533","chapter_id":"1159587","question":"<p>Cho các phát bi\u1ec3u sau:<\/p><p>(1) Glucose có kh\u1ea3 n\u0103ng tham gia ph\u1ea3n \u1ee9ng tráng b\u1ea1c.<\/p><p>(2) Saccharose và tinh b\u1ed9t \u0111\u1ec1u không b\u1ecb th\u1ee7y phân khi có acid H<span class=\"math-tex\">$_{2}$<\/span>SO<span class=\"math-tex\">$_{4}$<\/span> (loãng) làm xúc tác.<\/p><p>(3) Tinh b\u1ed9t \u0111\u01b0\u1ee3c t\u1ea1o thành trong cây xanh nh\u1edd quá trình quang h\u1ee3p.<\/p><p>(4) Cellulose và saccharose khi th\u1ee7y phân \u0111\u1ec1u ch\u1ec9 thu \u0111\u01b0\u1ee3c glucose.<\/p><p>S\u1ed1 phát bi\u1ec3u \u0111úng là:<\/p>","options":["<strong>A.<\/strong> 1","<strong>B. <\/strong>2","<strong>C. <\/strong>3","<strong>D.<\/strong> 4"],"correct":"2","level":"3","hint":"<p>Hãy xem xét t\u1eebng phát bi\u1ec3u liên quan \u0111\u1ebfn tính ch\u1ea5t và ph\u1ea3n \u1ee9ng c\u1ee7a các lo\u1ea1i \u0111\u01b0\u1eddng khác nhau, \u0111\u1eb7c bi\u1ec7t là kh\u1ea3 n\u0103ng tham gia ph\u1ea3n \u1ee9ng tráng b\u1ea1c và quá trình th\u1ee7y phân d\u01b0\u1edbi tác d\u1ee5ng c\u1ee7a axit.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>B. 2<\/strong><\/span><\/p><p><strong>Phát bi\u1ec3u 1:<\/strong> Glucose có kh\u1ea3 n\u0103ng tham gia ph\u1ea3n \u1ee9ng tráng b\u1ea1c (do nó là m\u1ed9t aldose), <strong>\u0111úng<\/strong>.<\/p><p><strong>Phát bi\u1ec3u 2:<\/strong> Saccharose (m\u1ed9t disaccharide) b\u1ecb th\u1ee7y phân khi có acid H<span class=\"math-tex\">$_{2}$<\/span>SO<span class=\"math-tex\">$_{4}$<\/span>, và tinh b\u1ed9t c\u0169ng b\u1ecb th\u1ee7y phân thành glucose. <strong>sai<\/strong>.<\/p><p><strong>Phát bi\u1ec3u 3:<\/strong> Tinh b\u1ed9t \u0111\u01b0\u1ee3c t\u1ea1o thành trong cây xanh nh\u1edd quá trình quang h\u1ee3p, <strong>\u0111úng<\/strong>.<\/p><p><strong>Phát bi\u1ec3u 4:<\/strong> Cellulose và saccharose khi th\u1ee7y phân không ch\u1ec9 thu \u0111\u01b0\u1ee3c glucose mà còn các monosaccharide khác, <strong>sai<\/strong>.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"127","test":"0","date":"2024-11-26 19:32:30","option_type":"txt","len":0},{"id":"8907","post_id":"8067","mon_id":"1159533","chapter_id":"1159587","question":"<p>Khi thu\u1ef7 phân 1 kg b\u1ed9t g\u1ea1o có 80% tinh b\u1ed9t, thì kh\u1ed1i l\u01b0\u1ee3ng glucose thu \u0111\u01b0\u1ee3c là bao nhiêu? Gi\u1ea3 thi\u1ebft hi\u1ec7u su\u1ea5t ph\u1ea3n \u1ee9ng là 100%.<\/p>","options":["<strong>A.<\/strong> 0,80 kg","<strong>B. <\/strong>0,90 kg","<strong>C.<\/strong> 0,99 kg","<strong>D. <\/strong>0,89 kg"],"correct":"4","level":"3","hint":"<p>- Khi th\u1ee7y phân tinh b\u1ed9t, m\u1ed7i phân t\u1eed tinh b\u1ed9t s\u1ebd phân h\u1ee7y thành glucose.<\/p><p>- Tính kh\u1ed1i l\u01b0\u1ee3ng glucose thu \u0111\u01b0\u1ee3c t\u1eeb l\u01b0\u1ee3ng tinh b\u1ed9t.<\/p><p>- L\u01b0u ý hi\u1ec7u su\u1ea5t ph\u1ea3n \u1ee9ng trong tr\u01b0\u1eddng h\u1ee3p này là 100%.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>D. 0,89 kg<\/strong><\/span><\/p><p>m<sub>tinh b\u1ed9t<\/sub> = 1.80%\/100% = 0,8 kg.<\/p><p>PTHH: (-C<sub>6<\/sub>H<sub>10<\/sub>O<sub>5<\/sub>-)<sub>n<\/sub> + nH<sub>2<\/sub>O \u27f6 nC<sub>6<\/sub>H<sub>12<\/sub>O<sub>6<\/sub><\/p><p> 162n 180n<\/p><p> 0,8 → x (kg)<\/p><p>\u27f9 x = (0,8.180n)\/(162n) = <strong>0,89 kg.<\/strong><\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"127","test":"0","date":"2024-11-27 22:23:17","option_type":"txt","len":0}]}