Ôn thi tốt nghiệp THPT môn Hoá học - Lớp 12 - Đề tham khảo tốt nghiệp THPT môn Hóa học năm 2025 của Bắc Giang (lần 1)

{"save":1,"level":1,"time":"0","total":40,"point":5,"segment":[{"id":"5610","test_id":"539","question":"<p>Tinh b\u1ed9t thu\u1ed9c lo\u1ea1i polysaccharide, l&agrave; m\u1ed9t trong nh\u1eefng ch\u1ea5t dinh d\u01b0\u1ee1ng c\u01a1 b\u1ea3n c\u1ee7a ng\u01b0\u1eddi v&agrave; \u0111\u1ed9ng v\u1eadt. Ph&acirc;n t\u1eed tinh b\u1ed9t \u0111\u01b0\u1ee3c t\u1ea1o th&agrave;nh t\u1eeb nhi\u1ec1u \u0111\u01a1n v\u1ecb:<\/p>","options":["<strong>A.<\/strong> &alpha;-fructose.","<strong>B.<\/strong> &alpha;-glucose.","<strong>C.<\/strong> &beta;-fructose.","<strong>D.<\/strong> &beta;-glucose."],"correct":"2","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>B.<\/strong> &alpha;-glucose.<\/span><\/p><p>Ph&acirc;n t\u1eed tinh b\u1ed9t \u0111\u01b0\u1ee3c t\u1ea1o th&agrave;nh t\u1eeb nhi\u1ec1u g\u1ed1c<strong> &alpha;-glucose <\/strong>li&ecirc;n k\u1ebft v\u1edbi nhau b\u1eb1ng li&ecirc;n k\u1ebft &alpha;-1,4-glycoside (\u1edf v\u1ecb tr&iacute; r\u1ebd nh&aacute;nh trong amylopectin l&agrave; &alpha;-1,6-glycoside).<\/p>","type":"choose","user_id":"131","test":"3","date":"2025-06-14 15:48:53"},{"id":"5611","test_id":"539","question":"<p>Cho c&aacute;c ph&aacute;t bi\u1ec3u sau:<\/p><p>(1) H\u1ea7u h\u1ebft c&aacute;c mu\u1ed1i ammonium \u0111\u1ec1u d\u1ec5 tan trong n\u01b0\u1edbc;<\/p><p>(2) Ion NH<sup>4+<\/sup> t&aacute;c d\u1ee5ng v\u1edbi dung d\u1ecbch acid t\u1ea1o k\u1ebft t\u1ee7a m&agrave;u tr\u1eafng;<\/p><p>(3) Mu\u1ed1i ammonium t&aacute;c d\u1ee5ng v\u1edbi dung d\u1ecbch base thu \u0111\u01b0\u1ee3c kh&iacute; c&oacute; m&ugrave;i khai;<\/p><p>(4) H\u1ea7u h\u1ebft mu\u1ed1i ammonium \u0111\u1ec1u b\u1ec1n nhi\u1ec7t.<\/p><p>Ph&aacute;t bi\u1ec3u <strong>\u0111&uacute;ng<\/strong> l&agrave;:<\/p>","options":["<strong>A. <\/strong>(2) v&agrave; (3).","<strong>B.<\/strong> (1) v&agrave; (2).","<strong>C.<\/strong> (1) v&agrave; (3).","<strong>D. <\/strong>(2) v&agrave; (4)."],"correct":"3","answer":"<p>Ch\u1ecdn&nbsp;<span style=\"color:#16a085;\"><strong>C.<\/strong> (1) v&agrave; (3).<\/span><\/p><p><span style=\"color:#16a085;\">(1) \u0110&uacute;ng<\/span>.<\/p><p><span style=\"color:#c0392b;\">(2) Sai<\/span>, ion NH<sup>4+<\/sup> kh&ocirc;ng ph\u1ea3n \u1ee9ng v\u1edbi dung d\u1ecbch acid.<\/p><p><span style=\"color:#16a085;\">(3) \u0110&uacute;ng<\/span>, NH<sup>4+<\/sup> + OH<sup>&ndash;<\/sup> &rarr; NH<sub>3<\/sub> + H<sub>2<\/sub>O, kh&iacute; c&oacute; m&ugrave;i khai l&agrave; NH<sub>3<\/sub>.<\/p><p><span style=\"color:#c0392b;\">(4) Sai<\/span>, h\u1ea7u h\u1ebft mu\u1ed1i ammonium \u0111\u1ec1u k&eacute;m b\u1ec1n v\u1edbi nhi\u1ec7t.<\/p><p>V\u1eady c&aacute;c ph&aacute;t bi\u1ec3u&nbsp;\u0111&uacute;ng l&agrave; (1) v&agrave; (3).<\/p>","type":"choose","user_id":"131","test":"1","date":"2025-06-14 15:51:38"}]}