{"segment":[{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" M\u1ec7nh \u0111\u1ec1 n\u00e0o sau \u0111\u00e2y \u0111\u00fang:","select":["A. S\u1ef1 ph\u00e1 h\u1ee7y kim lo\u1ea1i, h\u1ee3p kim d\u01b0\u1edbi t\u00e1c d\u1ee5ng h\u00f3a h\u1ecdc c\u1ee7a m\u00f4i tr\u01b0\u1eddng g\u1ecdi l\u00e0 s\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i ","B. S\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i l\u00e0 s\u1ef1 ph\u00e1 h\u1ee7y kim lo\u1ea1i b\u1edfi ch\u1ea5t kh\u00ed hay h\u01a1i n\u01b0\u1edbc \u1edf nhi\u1ec7t \u0111\u1ed9 cao","C. S\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i l\u00e0 s\u1ef1 ph\u00e1 h\u1ee7y kim lo\u1ea1i do kim lo\u1ea1i ti\u1ebfp x\u00fac v\u1edbi dung d\u1ecbch axit ","D. C\u00e1c m\u1ec7nh \u0111\u1ec1 A, B, C \u0111\u1ec1u \u0111\u00fang"],"hint":"","explain":"<span class='basic_left'>S\u1ef1 ph\u00e1 h\u1ee7y kim lo\u1ea1i, h\u1ee3p kim do t\u00e1c d\u1ee5ng h\u00f3a h\u1ecdc trong m\u00f4i tr\u01b0\u1eddng \u0111\u01b0\u1ee3c g\u1ecdi l\u00e0 s\u1ef1 \u0103n m\u00f2n h\u00f3a h\u1ecdc.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2111},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" S\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng","select":["A. V\u1eadt l\u00ed","B. H\u00f3a h\u1ecdc","C. Kh\u00f4ng l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00ed, kh\u00f4ng l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng h\u00f3a h\u1ecdc","D. V\u1eeba l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng v\u1eadt l\u00ed v\u1eeba l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng h\u00f3a h\u1ecdc"],"hint":"","explain":"<span class='basic_left'> S\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i l\u00e0 hi\u1ec7n t\u01b0\u1ee3ng h\u00f3a h\u1ecdc <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2112},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" Bi\u1ec7n ph\u00e1p n\u00e0o sau \u0111\u00e2y \u0111\u1ec3 tr\u00e1nh kim lo\u1ea1i kh\u00f4ng b\u1ecb \u0103n m\u00f2n.","select":["A. Ph\u01a1i kim lo\u1ea1i ra tr\u1eddi n\u1eafng","B. S\u01a1n, m\u1ea1, b\u00f4i m\u1ee1 l\u00ean tr\u00ean b\u1ec1 m\u1eb7t kim lo\u1ea1i","C. Ng\u00e2m kim lo\u1ea1i trong n\u01b0\u1edbc mu\u1ed1i","D. Ng\u00e2m kim lo\u1ea1i trong n\u01b0\u1edbc m\u00e1y."],"hint":"","explain":"<span class='basic_left'>M\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p tr\u00e1nh s\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i:<br\/>S\u01a1n, m\u1ea1, b\u00f4i d\u1ea7u m\u1ee1,... tr\u00ean b\u1ec1 m\u1eb7t kim lo\u1ea1i<br\/>\u0110\u1ec3 \u0111\u1ed3 v\u1eadt \u1edf n\u01a1i kh\u00f4 r\u00e1o, th\u01b0\u1eddng xuy\u00ean lau ch\u00f9i s\u1ea1ch s\u1ebd sau khi s\u1eed d\u1ee5ng nh\u01b0: lau b\u1ebfp d\u1ea7u, b\u1ebfp ga,...<br\/>Ch\u1ebf t\u1ea1o c\u00e1c h\u1ee3p kim \u00edt b\u1ecb \u0103n m\u00f2n. V\u00ed d\u1ee5 cho th\u00eam v\u00e0o th\u00e9p 1 s\u1ed1 nguy\u00ean t\u1ed1 kim lo\u1ea1i nh\u01b0 crom, niken,...<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2113},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" Trong n\u01b0\u1edbc m\u01b0a th\u01b0\u1eddng c\u00f3 ch\u1ee9a axit l\u00e0 do kh\u00ed X khi\u1ebfn s\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i di\u1ec5n ra nhanh h\u01a1n. Kh\u00ed X l\u00e0:","select":["A. $O_2$ ","B. $CO_2$","C. $N_2$ ","D. $SO_3$"],"hint":"","explain":"<span class='basic_left'>Trong n\u01b0\u1edbc m\u01b0a th\u01b0\u1eddng c\u00f3 ch\u1ee9a axit do c\u00f3 kh\u00ed $CO_2$ v\u00e0 m\u1ed9t s\u00f4 kh\u00ed kh\u00e1c b\u1ecb h\u00f2a tan.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2114},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Trong kh\u00f4ng kh\u00ed c\u00f3 ch\u1ee9a kh\u00ed n\u00e0o l\u00e0 nguy\u00ean nh\u00e2n ch\u1ee7 y\u1ebfu l\u00e0m cho kim lo\u1ea1i b\u1ecb \u0103n m\u00f2n","select":["A. $N_2$ ","B. $CO_2$","C. $O_2$ ","D. $SO_2$"],"hint":"","explain":"<span class='basic_left'>\u0110\u1ec3 m\u1ed9t s\u1ed1 kim lo\u1ea1i ngo\u00e0i kh\u00f4ng kh\u00ed, kim lo\u1ea1i b\u1ecb \u0103n m\u00f2n do t\u00e1c d\u1ee5ng v\u1edbi oxi trong kh\u00f4ng kh\u00ed.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2115},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" \u0110inh s\u1eaft kh\u00f4ng b\u1ecb \u0103n m\u00f2n trong","select":["A. Kh\u00f4ng kh\u00ed \u1ea9m ","B. N\u01b0\u1edbc m\u00e1y","C. Kh\u00f4ng kh\u00ed kh\u00f4 ","D. Dung d\u1ecbch axit."],"hint":"","explain":"<span class='basic_left'>\u0110inh s\u1eaft kh\u00f4ng b\u1ecb \u0103n m\u00f2n trong kh\u00f4ng kh\u00ed kh\u00f4.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2116},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Trong n\u01b0\u1edbc bi\u1ec3n s\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i x\u1ea3y ra nhanh h\u01a1n l\u00e0 do trong n\u01b0\u1edbc bi\u1ec3n c\u00f3 ch\u1ee9a.","select":["A. C\u00e1c axit m\u1ea1nh ","B. C\u00e1c baz\u01a1 m\u1ea1nh ","C. C\u00e1c mu\u1ed1i ","D. Ch\u1ee9a n\u01b0\u1edbc"],"hint":"","explain":"<span class='basic_left'>Trong n\u01b0\u1edbc bi\u1ec3n c\u00f3 ch\u1ee9a c\u00e1c mu\u1ed1i nh\u01b0 $NaCl, MgCl_2$ khi\u1ebfn c\u00e1c kim lo\u1ea1i b\u1ecb \u0103n m\u00f2n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2117},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" \u0110inh s\u1eaft b\u1ecb \u0103n m\u00f2n nhanh trong m\u00f4i tr\u01b0\u1eddng: ","select":["A. Kh\u00f4ng kh\u00ed kh\u00f4","B. Trong n\u01b0\u1edbc c\u1ea5t c\u00f3 h\u00f2a tan oxi","C. N\u01b0\u1edbc c\u00f3 h\u00f2a tan kh\u00ed oxi ","D. Dung d\u1ecbch mu\u1ed1i \u0103n"],"hint":"","explain":"<span class='basic_left'>\u0110inh s\u1eaft b\u1ecb \u0103n m\u00f2n nhanh nh\u1ea5t trong dung d\u1ecbch mu\u1ed1i \u0103n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2118},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" Bi\u1ec7n ph\u00e1p n\u00e0o sau \u0111\u00e2y gi\u00fap b\u1ea3o v\u1ec7 kim lo\u1ea1i","select":["A. B\u00f4i d\u1ea7u m\u1ee1 l\u00ean b\u1ec1 m\u1eb7t kim lo\u1ea1i ","B. \u0110\u1ec3 kim lo\u1ea1i ng\u00e2m trong n\u01b0\u1edbc m\u00e1y","C. Ch\u1ebf t\u1ea1o h\u1ee3p kim \u00edt b\u1ecb \u0103n m\u00f2n ","D. C\u1ea3 A v\u00e0 C \u0111\u1ec1u \u0111\u00fang."],"hint":"","explain":"<span class='basic_left'>M\u1ed9t s\u1ed1 bi\u1ec7n ph\u00e1p tr\u00e1nh s\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i:<br\/>S\u01a1n, m\u1ea1, b\u00f4i d\u1ea7u m\u1ee1,... tr\u00ean b\u1ec1 m\u1eb7t kim lo\u1ea1i<br\/>\u0110\u1ec3 \u0111\u1ed3 v\u1eadt \u1edf n\u01a1i kh\u00f4 r\u00e1o, th\u01b0\u1eddng xuy\u00ean lau ch\u00f9i s\u1ea1ch s\u1ebd sau khi s\u1eed d\u1ee5ng nh\u01b0: lau b\u1ebfp d\u1ea7u, b\u1ebfp ga,...<br\/>Ch\u1ebf t\u1ea1o c\u00e1c h\u1ee3p kim \u00edt b\u1ecb \u0103n m\u00f2n. V\u00ed d\u1ee5 cho th\u00eam v\u00e0o th\u00e9p 1 s\u1ed1 nguy\u00ean t\u1ed1 kim lo\u1ea1i nh\u01b0 crom, niken,...<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2119},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" \u0110\u1ec3 ch\u1ebf t\u1ea1o h\u1ee3p kim c\u1ee7a th\u00e9p b\u1ecb \u00edt \u0103n m\u00f2n ng\u01b0\u1eddi ta ","select":["A. T\u0103ng h\u00e0m l\u01b0\u1ee3ng C trong th\u00e9p","B. Gi\u1ea3m h\u00e0m l\u01b0\u1ee3ng C trong th\u00e9p","C. Th\u00eam v\u00e0o th\u00e9p m\u1ed9t s\u1ed1 kim lo\u1ea1i nh\u01b0 Cr, Ni ","D. Lo\u1ea1i b\u1ecf t\u1ea1p ch\u1ea5t trong th\u00e9p nh\u01b0: Cr, Ni"],"hint":"","explain":"<span class='basic_left'>Ch\u1ebf t\u1ea1o c\u00e1c h\u1ee3p kim \u00edt b\u1ecb \u0103n m\u00f2n. V\u00ed d\u1ee5 cho th\u00eam v\u00e0o th\u00e9p 1 s\u1ed1 nguy\u00ean t\u1ed1 kim lo\u1ea1i nh\u01b0 crom, niken,...<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2120},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" Kim lo\u1ea1i b\u1ecb \u0103n m\u00f2n nhanh khi:","select":["A. B\u00f4i d\u1ea7u m\u1ee1 l\u00ean b\u1ec1 m\u1eb7t kim lo\u1ea1i ","B. S\u01a1n, m\u1ea1 l\u00ean b\u1ec1 m\u1eb7t kim lo\u1ea1i","C. \u0110\u1ec3 \u0111\u1ed3 v\u1eadt n\u01a1i kh\u00f4 r\u00e1o, tho\u00e1ng m\u00e1t.","D. Ng\u00e2m kim lo\u1ea1i trong n\u01b0\u1edbc mu\u1ed1i m\u1ed9t th\u1eddi gian"],"hint":"","explain":"<span class='basic_left'>Ng\u00e2m kim lo\u1ea1i trong dung d\u1ecbch n\u01b0\u1edbc mu\u1ed1i kim lo\u1ea1i b\u1ecb \u0103n m\u00f2n r\u1ea5t nhanh.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2121},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" \u1ede nhi\u1ec7t \u0111\u1ed9 cao s\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i","select":["A. X\u1ea3y ra ch\u1eadm ","B. Kh\u00f4ng x\u1ea3y ra","C. X\u1ea3y ra nhanh ","D. S\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i kh\u00f4ng ch\u1ecbu \u1ea3nh h\u01b0\u1edfng c\u1ee7a nhi\u1ec7t \u0111\u1ed9"],"hint":"","explain":"<span class='basic_left'>\u1ede nhi\u1ec7t \u0111\u1ed9 cao kim lo\u1ea1i b\u1ecb \u0103n m\u00f2n nhanh h\u01a1n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2122},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" Con dao l\u00e0m b\u1eb1ng th\u00e9p kh\u00f4ng b\u1ecb g\u1ec9 n\u1ebfu:","select":["A. Sau khi d\u00f9ng, r\u1eeda s\u1ea1ch lau kh\u00f4","B. C\u1eaft chanh r\u1ed3i kh\u00f4ng r\u1eeda","C. Ng\u00e2m trong n\u01b0\u1edbc t\u1ef1 nhi\u00ean ho\u1eb7c n\u01b0\u1edbc m\u00e0y l\u00e2u ng\u00e0y. ","D. Ng\u00e2m trong n\u01b0\u1edbc mu\u1ed1i m\u1ed9t th\u1eddi gian"],"hint":"","explain":"<span class='basic_left'>Sau khi d\u00f9ng xong dao b\u1eb1ng s\u1eaft, r\u1eeda s\u1ea1ch lau kh\u00f4 s\u1ebd h\u1ea1n ch\u1ebf s\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2123},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":" V\u00ed d\u1ee5 n\u00e0o d\u01b0\u1edbi \u0111\u00e2y l\u00e0 s\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i","select":["A. Con dao b\u1eb1ng s\u1eaft b\u1ecb g\u1ec9.","B. N\u1ed3i gang b\u1ecb m\u00e9o","C. Kh\u1ed1i th\u00e9p b\u1ecb c\u1eaft nh\u1ecf","D. Con dao b\u1eb1ng s\u1eaft b\u1ecb m\u1ebb"],"hint":"","explain":"<span class='basic_left'>Dao b\u1eb1ng s\u1eaft b\u1ecb g\u1ec9 l\u00e0 s\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i. C\u00e1c tr\u01b0\u1eddng h\u1ee3p c\u00f2n l\u1ea1i kh\u00f4ng ph\u1ea3i s\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2124},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Nh\u00f4m kh\u00f4ng b\u1ecb \u0103n m\u00f2n trong m\u00f4i tr\u01b0\u1eddng:","select":["A. Dung d\u1ecbch axit ","B. Dung d\u1ecbch ki\u1ec1m","C. Kh\u00f4ng kh\u00ed","D. Dung d\u1ecbch mu\u1ed1i"],"hint":"","explain":"<span class='basic_left'>Nh\u00f4m \u0111\u1ec3 trong kh\u00f4ng kh\u00ed kh\u00f4ng b\u1ecb \u0103n m\u00f2n do c\u00f3 l\u1edbp m\u00e0ng oxit b\u1ec1n v\u1eefng b\u1ea3o v\u1ec7.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2125},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Tr\u01b0\u1eddng h\u1ee3p n\u00e0o d\u01b0\u1edbi \u0111\u00e2y KH\u00d4NG ph\u1ea3i l\u00e0 s\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i:","select":["A. V\u1ecf t\u00e0u th\u1ee7y b\u1ecb g\u1ec9 ","B. K\u1ebdm trong dung d\u1ecbch axit sunfuric lo\u00e3ng","C. L\u00e1 nh\u00f4m trong n\u01b0\u1edbc c\u1ea5t ","D. \u0110inh s\u1eaft trong dung d\u1ecbch axit clohi\u0111ric"],"hint":"","explain":"<span class='basic_left'>Nh\u00f4m c\u00f3 l\u1edbp m\u00e0ng oxit b\u1ea3o v\u1ec7 n\u00ean kh\u00f4ng t\u00e1c d\u1ee5ng v\u1edbi n\u01b0\u1edbc v\u00e0 kh\u00f4ng b\u1ecb \u0103n m\u00f2n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2126},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" Natri l\u00e0 kim lo\u1ea1i m\u1ea1nh, b\u1ecb \u0103n m\u00f2n r\u1ea5t nhanh. \u0110\u1ec3 natri kh\u00f4ng b\u1ecb \u0103n m\u00f2n ng\u01b0\u1eddi ta ng\u00e2m natri trong","select":["A. N\u01b0\u1edbc","B. R\u01b0\u1ee3u etylic","C. D\u1ea7u h\u1ecfa ","D. Dung d\u1ecbch $H_2SO_4$ lo\u00e3ng"],"hint":"","explain":"<span class='basic_left'>\u0110\u1ec3 b\u1ea3o qu\u1ea3n natri ng\u01b0\u1eddi ta ng\u00e2m natri trong d\u1ea7u h\u1ecfa.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2127},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":" S\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i ph\u1ee5 thu\u1ed9c v\u00e0o","select":["A. Nhi\u1ec7t \u0111\u1ed9","B. B\u1ea3n ch\u1ea5t c\u1ee7a kim lo\u1ea1i","C. M\u00f4i tr\u01b0\u1eddng xung quanh kim lo\u1ea1i ","D. C\u1ea3 A, B, C \u0111\u1ec1u \u0111\u00fang."],"hint":"","explain":"<span class='basic_left'>S\u1ef1 \u0103n m\u00f2n kim lo\u1ea1i nhanh hay ch\u1eadm ph\u1ee5 thu\u1ed9c v\u00e0o: nhi\u1ec7t \u0111\u1ed9, b\u1ea3n ch\u1ea5t c\u1ee7a kim lo\u1ea1i b\u1ecb \u0103n m\u00f2n v\u00e0 \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng xung quanh.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2128},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":" M\u00f9a n\u00e0o trong n\u0103m khi\u1ebfn s\u1eaft b\u1ecb \u0103n m\u00f2n nhanh nh\u1ea5t (coi \u0111i\u1ec1u ki\u1ec7n m\u00f4i tr\u01b0\u1eddng kh\u00f4ng thay \u0111\u1ed5i)","select":["A. M\u00f9a xu\u00e2n ","B. M\u00f9a thu ","C. M\u00f9a h\u1ea1 ","D. M\u00f9a \u0111\u00f4ng"],"hint":"","explain":"<span class='basic_left'>M\u00f9a h\u1ea1 nhi\u1ec7t \u0111\u1ed9 cao nh\u1ea5t n\u00ean s\u1ef1 \u0103n m\u00f2n x\u1ea3y ra nhanh nh\u1ea5t.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 C.<\/span><\/span> ","column":2}]}],"id_ques":2129},{"time":24,"part":[{"title":"Ch\u1ecdn ph\u01b0\u01a1ng \u00e1n \u0110\u00daNG","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":" \u0110\u1ec3 m\u1ed9t thanh s\u1eaft n\u1eb7ng 9 gam trong kh\u00f4ng kh\u00ed m\u1ed9t th\u1eddi gian th\u1ea5y t\u1ea1o l\u1edbp oxit $Fe_3O_4$, kh\u1ed1i l\u01b0\u1ee3ng \u0111inh s\u1eaft t\u0103ng l\u00ean 1 l\u01b0\u1ee3ng 1,6 gam. % thanh s\u1eaft b\u1ecb oxi h\u00f3a l\u00e0:","select":["A. 33,33%","B. 46,67% ","C. 55,7% ","D. 61,55%"],"hint":"","explain":"<span class='basic_left'>Kh\u1ed1i l\u01b0\u1ee3ng thanh s\u1eaft t\u0103ng ch\u00ednh l\u00e0 kh\u1ed1i l\u01b0\u1ee3ng oxi tham gia ph\u1ea3n \u1ee9ng oxi h\u00f3a s\u1eaft t\u1ea1o oxit s\u1eaft t\u1eeb.<br\/>$\\begin{aligned}& 3Fe+2{{O}_{2}}\\xrightarrow{{{t}^{0}}}F{{e}_{3}}{{O}_{4}} \\\\ & {{n}_{Fe}}=\\dfrac{3}{2}{{n}_{{{O}_{2}}}}=\\dfrac{3}{2}.0,05=0,075\\,mol \\\\ & {{m}_{Fe}}=4,2\\,gam \\\\ & \\%{{m}_{Fe\\,(\\text{ox}h)}}=\\dfrac{4,2}{9}.100\\%\\approx 46,67\\% \\\\ \\end{aligned}$ <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2130}],"lesson":{"save":0,"level":2}}