Ethylic alcohol

Home Lớp 9 Khoa học tự nhiên 9 - sách kết nối tri thức Bài 26: Ethylic alcoholBài tập cơ bản

{"common":{"save":0,"post_id":"7927","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"8345","post_id":"7927","mon_id":"1159533","chapter_id":"1159574","question":"Nhi\u1ec7t \u0111\u1ed9 sôi c\u1ee7a ethylic alcohol là:<\/p>","options":["A.<\/strong> 78,3 $^0$<\/span>C","B. <\/strong>87,3 $^0$<\/span>C","C. <\/strong>73,8 $^0$<\/span>C","D. <\/strong>83,7 $^0$<\/span>C"],"correct":"1","level":"1","hint":"Ethanol có nhi\u1ec7t \u0111\u1ed9 sôi t\u01b0\u01a1ng \u0111\u1ed1i th\u1ea5p h\u01a1n n\u01b0\u1edbc, và nó là m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m quan tr\u1ecdng trong các \u1ee9ng d\u1ee5ng c\u1ee7a ethanol.<\/p>","answer":"\u0110áp án \u0111úng: A. 78,3 $^0$<\/span>C<\/strong><\/span><\/p>Ethanol có nhi\u1ec7t \u0111\u1ed9 sôi là 78,3°C, m\u1ed9t \u0111\u1eb7c \u0111i\u1ec3m giúp nó d\u1ec5 dàng bay h\u01a1i và là lý do chính cho các \u1ee9ng d\u1ee5ng trong công nghi\u1ec7p, làm dung môi, và s\u1ea3n xu\u1ea5t \u0111\u1ed3 u\u1ed1ng có c\u1ed3n.<\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"127","test":"0","date":"2024-11-04 12:49:32","option_type":"math","len":0},{"id":"8346","post_id":"7927","mon_id":"1159533","chapter_id":"1159574","question":"\u0110\u1ed9 r\u01b0\u1ee3u là:<\/p>","options":["A. <\/strong>s\u1ed1 mL ethylic alcohol nguyên ch\u1ea5t có trong 100 mL h\u1ed7n h\u1ee3p r\u01b0\u1ee3u v\u1edbi n\u01b0\u1edbc","B.<\/strong> s\u1ed1 mL n\u01b0\u1edbc có trong 100 mL h\u1ed7n h\u1ee3p r\u01b0\u1ee3u v\u1edbi n\u01b0\u1edbc","C. <\/strong>s\u1ed1 gam ethylic alcohol nguyên ch\u1ea5t có trong 100 mL h\u1ed7n h\u1ee3p r\u01b0\u1ee3u v\u1edbi n\u01b0\u1edbc","D. <\/strong>s\u1ed1 gam n\u01b0\u1edbc có trong 100 gam h\u1ed7n h\u1ee3p r\u01b0\u1ee3u v\u1edbi n\u01b0\u1edbc"],"correct":"1","level":"1","hint":"\u0110\u1ed9 r\u01b0\u1ee3u th\u01b0\u1eddng liên quan \u0111\u1ebfn l\u01b0\u1ee3ng ethanol có trong m\u1ed9t th\u1ec3 tích nh\u1ea5t \u0111\u1ecbnh c\u1ee7a h\u1ed7n h\u1ee3p r\u01b0\u1ee3u và n\u01b0\u1edbc.<\/p>L\u01b0u ý \u0111\u01a1n v\u1ecb \u0111o th\u01b0\u1eddng dùng là gì (mL hay gam) \u0111\u1ec3 xác \u0111\u1ecbnh chính xác cách tính \u0111\u1ed9 r\u01b0\u1ee3u.<\/p>","answer":"\u0110áp án \u0111úng: A. s\u1ed1 mL ethylic alcohol nguyên ch\u1ea5t có trong 100 mL h\u1ed7n h\u1ee3p r\u01b0\u1ee3u v\u1edbi n\u01b0\u1edbc<\/strong><\/span><\/p>\u0110\u1ed9 r\u01b0\u1ee3u \u0111\u01b0\u1ee3c tính theo s\u1ed1 mL ethanol (ethylic alcohol) nguyên ch\u1ea5t trong 100 mL h\u1ed7n h\u1ee3p r\u01b0\u1ee3u và n\u01b0\u1edbc.<\/p>","type":"choose","extra_type":"cloud","time":"0","user_id":"127","test":"0","date":"2024-11-04 12:55:39","option_type":"txt","len":0},{"id":"8347","post_id":"7927","mon_id":"1159533","chapter_id":"1159574","question":"Công th\u1ee9c c\u1ea5u t\u1ea1o c\u1ee7a r\u01b0\u1ee3u ethylic là:<\/p>","options":["A. <\/strong>CH$_{2}$<\/span> – CH$_{3}$<\/span> – OH","B.<\/strong> CH$_{3}$<\/span> – O – CH$_{3}$<\/span>","C.<\/strong> CH$_{2}$<\/span> – CH$_{2}$<\/span> – OH$_{2}$<\/span>","D. <\/strong>CH$_{3}$<\/span> – CH$_{2}$<\/span> – OH"],"correct":"4","level":"1","hint":"L\u01b0u ý công th\u1ee9c c\u1ea5u t\u1ea1o c\u1ee7a r\u01b0\u1ee3u etylic có m\u1ed9t nhóm -OH g\u1eafn v\u1edbi nhóm ethyl (CH3-CH2-). \u0110ây là \u0111\u1eb7c tr\u01b0ng c\u1ee7a r\u01b0\u1ee3u trong hóa h\u1ecdc h\u1eefu c\u01a1.<\/p>","answer":"\u0110áp án \u0111úng: D. CH$_{3}$<\/span> – CH$_{2}$<\/span> – OH<\/strong><\/span><\/p>R\u01b0\u1ee3u etylic (ethanol) có công th\u1ee9c c\u1ea5u t\u1ea1o CH$_{3}$<\/span> – CH$_{2}$<\/span> – OH<\/strong>, v\u1edbi nhóm -OH g\u1eafn vào nhóm ethyl (CH$_{3}$<\/span><\/strong>-CH$_{2}$<\/span><\/strong>-), th\u1ec3 hi\u1ec7n \u0111\u1eb7c tr\u01b0ng c\u1ee7a nhóm r\u01b0\u1ee3u.<\/p>","type":"choose","extra_type":"cloud","time":"0","user_id":"127","test":"0","date":"2024-11-04 12:57:59","option_type":"math","len":0}]}