{"segment":[{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Khi \u0111\u1ed5 50 $c{{m}^{3}}$ r\u01b0\u1ee3u v\u00e0o 50 $c{{m}^{3}}$ n\u01b0\u1edbc, ta thu \u0111\u01b0\u1ee3c m\u1ed9t h\u1ed7n h\u1ee3p r\u01b0\u1ee3u - n\u01b0\u1edbc c\u00f3 th\u1ec3 t\u00edch bao nhi\u00eau?","select":["A. D\u01b0\u1edbi 100 $c{{m}^{3}}$.","B. \u0110\u00fang b\u1eb1ng 50 $c{{m}^{3}}$.","C. \u0110\u00fang b\u1eb1ng 100 $c{{m}^{3}}$.","D. Tr\u00ean 100 $c{{m}^{3}}$."],"hint":"","explain":"<span class='basic_left'>Gi\u1eefa c\u00e1c ph\u00e2n t\u1eed r\u01b0\u1ee3u, n\u01b0\u1edbc c\u00f3 kho\u1ea3ng c\u00e1ch cho n\u00ean khi \u0111\u1ed5 r\u01b0\u1ee3u v\u00e0o n\u01b0\u1edbc c\u00e1c ph\u00e2n t\u1eed r\u01b0\u1ee3u, n\u01b0\u1edbc xen k\u1ebd v\u00e0o kho\u1ea3n c\u00e1ch c\u1ee7a nhau n\u00ean h\u1ed7n h\u1ee3p thu \u0111\u01b0\u1ee3c c\u00f3 th\u1ec3 t\u00edch nh\u1ecf h\u01a1n t\u1ed5ng th\u1ec3 t\u00edch c\u1ee7a hai ch\u1ea5t khi mang tr\u1ed9n.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":2}]}],"id_ques":2820},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"T\u1ea1i sao qu\u1ea3 b\u00f3ng bay d\u00f9 \u0111\u01b0\u1ee3c bu\u1ed9c ch\u1eb7t l\u00e2u ng\u00e0y v\u1eabn b\u1ecb x\u1eb9p?","select":["A. V\u00ec khi m\u1edbi th\u1ed5i, kh\u00f4ng kh\u00ed t\u1eeb mi\u1ec7ng v\u00e0o b\u00f3ng c\u00f2n n\u00f3ng, sau \u0111\u00f3 l\u1ea1nh d\u1ea7n n\u00ean co l\u1ea1i.","B. V\u00ec cao su l\u00e0 ch\u1ea5t \u0111\u00e0n h\u1ed3i n\u00ean sau b\u1ecb th\u1ed5i c\u0103ng n\u00f3 t\u1ef1 \u0111\u1ed9ng co l\u1ea1i.","C. V\u00ec kh\u00f4ng kh\u00ed nh\u1eb9 n\u00ean c\u00f3 th\u1ec3 chui qua ch\u1ed7 bu\u1ed9c ra ngo\u00e0i.","D. V\u00ec gi\u1eefa c\u00e1c ph\u00e2n t\u1eed c\u1ee7a ch\u1ea5t l\u00e0m v\u1ecf b\u00f3ng c\u00f3 kho\u1ea3ng c\u00e1ch n\u00ean c\u00e1c ph\u00e2n t\u1eed kh\u00f4ng kh\u00ed c\u00f3 th\u1ec3 qua \u0111\u00f3 tho\u00e1t ra ngo\u00e0i."],"hint":"","explain":"<span class='basic_left'>V\u00ec gi\u1eefa c\u00e1c ph\u00e2n t\u1eed c\u1ee7a ch\u1ea5t l\u00e0m v\u1ecf b\u00f3ng c\u00f3 kho\u1ea3ng c\u00e1ch n\u00ean c\u00e1c ph\u00e2n t\u1eed kh\u00f4ng kh\u00ed c\u00f3 th\u1ec3 qua \u0111\u00f3 tho\u00e1t ra ngo\u00e0i.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2821},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Ch\u1ecdn ph\u00e1t bi\u1ec3u \u0111\u00fang? ","select":["A. Nguy\u00ean t\u1eed, ph\u00e2n t\u1eed l\u00e0 nh\u1eefng h\u1ea1t v\u00f4 c\u00f9ng nh\u1ecf b\u00e9, m\u1eaft th\u01b0\u1eddng kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c.","B. Nguy\u00ean t\u1eed, ph\u00e2n t\u1eed l\u00e0 nh\u1eefng h\u1ea1t v\u00f4 c\u00f9ng nh\u1ecf b\u00e9, tuy nhi\u00ean m\u1eaft th\u01b0\u1eddng v\u1eabn c\u00f3 th\u1ec3 quan s\u00e1t \u0111\u01b0\u1ee3c.","C. V\u00ec c\u00e1c nguy\u00ean t\u1eed, ph\u00e2n t\u1eed r\u1ea5t b\u00e9 n\u00ean gi\u1eefa ch\u00fang kh\u00f4ng c\u00f3 kho\u1ea3ng c\u00e1ch.","D. Nguy\u00ean t\u1eed, ph\u00e2n t\u1eed c\u1ee7a c\u00e1c ch\u1ea5t \u0111\u1ec1u gi\u1ed1ng nhau."],"hint":"","explain":"<span class='basic_left'>Nguy\u00ean t\u1eed, ph\u00e2n t\u1eed l\u00e0 nh\u1eefng h\u1ea1t v\u00f4 c\u00f9ng nh\u1ecf b\u00e9, m\u1eaft th\u01b0\u1eddng kh\u00f4ng th\u1ec3 nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c. Gi\u1eefa c\u00e1c nguy\u00ean t\u1eed, ph\u00e2n t\u1eed c\u1ee7a b\u1ea5t k\u1ef3 ch\u1ea5t n\u00e0o c\u0169ng c\u00f3 kho\u1ea3ng c\u00e1ch<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2822},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"N\u01b0\u1edbc bi\u1ec3n v\u1ecb m\u1eb7n v\u00ec sao?","select":["A. Do c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc bi\u1ec3n c\u00f3 v\u1ecb m\u1eb7n.","B. Do c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc v\u00e0 c\u00e1c ph\u00e2n t\u1eed mu\u1ed1i li\u00ean k\u1ebft v\u1edbi nhau.","C. C\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc v\u00e0 ph\u00e2n t\u1eed mu\u1ed1i xen k\u1ebd v\u1edbi nhau v\u00ec gi\u1eefa ch\u00fang c\u00f3 kho\u1ea3ng c\u00e1ch.","D. C\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc v\u00e0 nguy\u00ean t\u1eed mu\u1ed1i xen k\u1ebd v\u1edbi nhau v\u00ec gi\u1eefa ch\u00fang c\u00f3 kho\u1ea3ng c\u00e1ch."],"hint":"","explain":"<span class='basic_left'>N\u01b0\u1edbc bi\u1ec3n v\u1ecb m\u1eb7n v\u00ec c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc v\u00e0 ph\u00e2n t\u1eed mu\u1ed1i xen k\u1ebd v\u1edbi nhau , gi\u1eefa ch\u00fang c\u00f3 kho\u1ea3ng c\u00e1ch.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2823},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"T\u1ea1i sao c\u00e1c ch\u1ea5t tr\u00f4ng \u0111\u1ec1u c\u00f3 v\u1ebb li\u1ec1n nh\u01b0 m\u1ed9t kh\u1ed1i, m\u1eb7c d\u00f9 ch\u00fang \u0111\u1ec1u \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb c\u00e1c h\u1ea1t ri\u00eang bi\u1ec7t? C\u00e2u gi\u1ea3i th\u00edch n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang nh\u1ea5t:","select":["A. V\u00ec c\u00e1c h\u1ea1t v\u1eadt ch\u1ea5t r\u1ea5t nh\u1ecf, kho\u1ea3ng c\u00e1ch gi\u1eefa ch\u00fang c\u0169ng r\u1ea5t nh\u1ecf n\u00ean m\u1eaft th\u01b0\u1eddng ta kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c.","B. V\u00ec m\u1ed9t v\u1eadt ch\u1ec9 \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb m\u1ed9t s\u1ed1 \u00edt c\u00e1c h\u1ea1t m\u00e0 th\u00f4i.","C. V\u00ec k\u00edch th\u01b0\u1edbc c\u00e1c h\u1ea1t kh\u00f4ng nh\u1ecf l\u1eafm nh\u01b0ng ch\u00fang l\u1ea1i n\u1eb1m r\u1ea5t s\u00e1t nhau.","D. M\u1ed9t c\u00e1ch gi\u1ea3i th\u00edch kh\u00e1c."],"hint":"","explain":"<span class='basic_left'>C\u00e1c h\u1ea1t nguy\u00ean t\u1eed, ph\u00e2n t\u1eed v\u00f4 c\u00f9ng nh\u1ecf b\u00e9 m\u1eaft th\u01b0\u1eddng ta kh\u00f4ng nh\u00ecn th\u1ea5y \u0111\u01b0\u1ee3c.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2824},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng:<br\/>........ l\u00e0 m\u1ed9t nh\u00f3m c\u00e1c nguy\u00ean t\u1eed k\u1ebft h\u1ee3p l\u1ea1i.","select":["A. Nguy\u00ean t\u1eed.","B. Ph\u00e2n t\u1eed.","C. V\u1eadt.","D. Ch\u1ea5t."],"hint":"","explain":"<span class='basic_left'>Ph\u00e2n t\u1eed l\u00e0 m\u1ed9t nh\u00f3m c\u00e1c nguy\u00ean t\u1eed k\u1ebft h\u1ee3p l\u1ea1i. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2825},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"\u0110i\u1ec1n t\u1eeb th\u00edch h\u1ee3p v\u00e0o ch\u1ed7 tr\u1ed1ng:<br\/>......... l\u00e0 h\u1ea1t ch\u1ea5t nh\u1ecf nh\u1ea5t.","select":["A. Ch\u1ea5t.","B. V\u1eadt.","C. Ph\u00e2n t\u1eed.","D. Nguy\u00ean t\u1eed."],"hint":"","explain":"<span class='basic_left'>Nguy\u00ean t\u1eed l\u00e0 h\u1ea1t ch\u1ea5t nh\u1ecf nh\u1ea5t.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":2}]}],"id_ques":2826},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Trong c\u00e1c tr\u01b0\u1eddng h\u1ee3p sau \u0111\u00e2y, tr\u01b0\u1eddng h\u1ee3p n\u00e0o ch\u1ee9ng t\u1ecf c\u00e1c ch\u1ea5t \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb c\u00e1c h\u1ea1t ri\u00eang bi\u1ec7t, gi\u1eefa ch\u00fang c\u00f3 kho\u1ea3ng c\u00e1ch?","select":["A. C\u00e1c h\u1ea1t \u0111\u01b0\u1eddng r\u1ea5t nh\u1ecf \u0111\u1ef1ng trong m\u1ed9t t\u00fai nh\u1ef1a.","B. M\u1edf m\u1ed9t bao xi m\u0103ng th\u1ea5y c\u00e1c h\u1ea1t xi m\u0103ng r\u1ea5t nh\u1ecf.","C. Quan s\u00e1t \u1ea3nh ch\u1ee5p c\u00e1c nguy\u00ean t\u1eed c\u1ee7a m\u1ed9t ch\u1ea5t n\u00e0o \u0111\u00f3 qua k\u00ednh hi\u1ec3n vi hi\u1ec7n \u0111\u1ea1i.","D. B\u00f3p n\u00e1t m\u1ed9t vi\u00ean ph\u1ea5n th\u00e0nh b\u1ed9t."],"hint":"","explain":"<span class='basic_left'>Quan s\u00e1t \u1ea3nh ch\u1ee5p c\u00e1c nguy\u00ean t\u1eed c\u1ee7a m\u1ed9t ch\u1ea5t n\u00e0o \u0111\u00f3 qua k\u00ednh hi\u1ec3n vi hi\u1ec7n \u0111\u1ea1i ta th\u1ea5y c\u00e1c ch\u1ea5t \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb c\u00e1c h\u1ea1t ri\u00eang bi\u1ec7t, gi\u1eefa ch\u00fang c\u00f3 kho\u1ea3ng c\u00e1ch. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2827},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"K\u00edch th\u01b0\u1edbc c\u1ee7a 1 ph\u00e2n t\u1eed hi\u0111r\u00f4 v\u00e0o kho\u1ea3ng 0,00000023mm. \u0110\u1ed9 d\u00e0i c\u1ee7a m\u1ed9t chu\u1ed7i g\u1ed3m 1 tri\u1ec7u ph\u00e2n t\u1eed n\u00e0y \u0111\u1ee9ng n\u1ed1i ti\u1ebfp nhau c\u00f3 th\u1ec3 nh\u1eadn gi\u00e1 tr\u1ecb n\u00e0o trong c\u00e1c gi\u00e1 tr\u1ecb sau:","select":["A. l=0,23m.","B. l=0,23mm.","C. l=0,23cm.","D. M\u1ed9t gi\u00e1 tr\u1ecb kh\u00e1c."],"hint":"","explain":"<span class='basic_left'>l= 0,00000023 x ${1{0}^{6}}$ = 0,23mm<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2828},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Ch\u1ecdn c\u00e2u \u0111\u00fang.","select":["A. C\u00e1c ch\u1ea5t c\u1ea5u t\u1ea1o t\u1eeb c\u00e1c ph\u00e2n t\u1eed, ph\u00e2n t\u1eed l\u00e0 h\u1ea1t nh\u1ecf nh\u1ea5t kh\u00f4ng th\u1ec3 ph\u00e2n chia \u0111\u01b0\u1ee3c.","B. \u1ede th\u1ec3 r\u1eafn, l\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed, nguy\u00ean t\u1eed nh\u1ecf h\u01a1n \u1edf th\u1ec3 l\u1ecfng.","C. S\u1ed1 ph\u00e2n t\u1eed, nguy\u00ean t\u1eed c\u1ea5u t\u1ea1o n\u00ean c\u00e1c ch\u1ea5t r\u1ea5t l\u1edbn v\u00ec k\u00edch th\u01b0\u1edbc c\u1ee7a c\u00e1c h\u1ea1t n\u00e0y r\u1ea5t nh\u1ecf.","D. V\u00ec th\u1ec3 t\u00edch b\u1ea3o to\u00e0n n\u00ean khi tr\u1ed9n hai ch\u1ea5t l\u1ecfng v\u1edbi nhau, th\u1ec3 t\u00edch c\u1ee7a h\u1ed7n h\u1ee3p s\u1ebd b\u1eb1ng t\u1ed5ng th\u1ec3 t\u00edch c\u1ee7a hai ch\u1ea5t l\u1ecfng."],"hint":"","explain":"<span class='basic_left'>S\u1ed1 ph\u00e2n t\u1eed, nguy\u00ean t\u1eed c\u1ea5u t\u1ea1o n\u00ean c\u00e1c ch\u1ea5t r\u1ea5t l\u1edbn v\u00ec k\u00edch th\u01b0\u1edbc c\u1ee7a c\u00e1c h\u1ea1t n\u00e0y r\u1ea5t nh\u1ecf.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2829},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Ph\u00e1t bi\u1ec3u n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang khi n\u00f3i v\u1ec1 c\u1ea5u t\u1ea1o c\u1ee7a c\u00e1c ch\u1ea5t?","select":["A. C\u00e1c ph\u00e2n t\u1eed, nguy\u00ean t\u1eed lu\u00f4n chuy\u1ec3n \u0111\u1ed9ng h\u1ed7n \u0111\u1ed9n kh\u00f4ng ng\u1eebng.","B. C\u00e1c ch\u1ea5t \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb c\u00e1c h\u1ea1t ri\u00eang bi\u1ec7t, r\u1ea5t nh\u1ecf b\u00e9 g\u1ecdi l\u00e0 c\u00e1c ph\u00e2n t\u1eed, nguy\u00ean t\u1eed.","C. C\u00e1c ph\u00e1t bi\u1ec3u n\u00eau ra \u0111\u1ec1u \u0111\u00fang.","D. Gi\u1eefa c\u00e1c ph\u00e2n t\u1eed, nguy\u00ean t\u1eed lu\u00f4n c\u00f3 kho\u1ea3ng c\u00e1ch."],"hint":"","explain":"<span class='basic_left'><br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2830},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"T\u1ea1i sao c\u00e1c ch\u1ea5t tr\u00f4ng \u0111\u1ec1u c\u00f3 v\u1ebb li\u1ec1n nh\u01b0 m\u1ed9t kh\u1ed1i, m\u1eb7c d\u00f9 ch\u00fang \u0111\u1ec1u \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb c\u00e1c h\u1ea1t ri\u00eang bi\u1ec7t? C\u00e2u gi\u1ea3i th\u00edch n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang nh\u1ea5t:","select":["A. M\u1ed9t c\u00e1ch gi\u1ea3i th\u00edch kh\u00e1c.","B. V\u00ec k\u00edch th\u01b0\u1edbc c\u00e1c h\u1ea1t kh\u00f4ng nh\u1ecf l\u1eafm nh\u01b0ng ch\u00fang l\u1ea1i n\u1eb1m r\u1ea5t s\u00e1t nhau.","C. V\u00ec m\u1ed9t v\u1eadt ch\u1ec9 \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb m\u1ed9t s\u1ed1 \u00edt c\u00e1c h\u1ea1t m\u00e0 th\u00f4i.","D. V\u00ec c\u00e1c h\u1ea1t v\u1eadt ch\u1ea5t r\u1ea5t nh\u1ecf, kho\u1ea3ng c\u00e1ch gi\u1eefa ch\u00fang c\u0169ng r\u1ea5t nh\u1ecf n\u00ean m\u1eaft th\u01b0\u1eddng ta kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c."],"hint":"","explain":"<span class='basic_left'>V\u00ec c\u00e1c h\u1ea1t v\u1eadt ch\u1ea5t r\u1ea5t nh\u1ecf, kho\u1ea3ng c\u00e1ch gi\u1eefa ch\u00fang c\u0169ng r\u1ea5t nh\u1ecf n\u00ean m\u1eaft th\u01b0\u1eddng ta kh\u00f4ng th\u1ec3 ph\u00e2n bi\u1ec7t \u0111\u01b0\u1ee3c n\u00ean c\u00e1c ch\u1ea5t tr\u00f4ng \u0111\u1ec1u c\u00f3 v\u1ebb li\u1ec1n nh\u01b0 m\u1ed9t kh\u1ed1i, m\u1eb7c d\u00f9 ch\u00fang \u0111\u1ec1u \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb c\u00e1c h\u1ea1t ri\u00eang bi\u1ec7t. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2831},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"T\u1ea1i sao x\u0103m xe \u0111\u1ea1p c\u00f2n t\u1ed1t \u0111\u00e3 b\u01a1m c\u0103ng, \u0111\u1ec3 l\u00e2u ng\u00e0y v\u1eabn b\u1ecb x\u1eb9p? Ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang trong c\u00e1c c\u00e2u tr\u1ea3 l\u1eddi sau:","select":["A. V\u00ec l\u00fac b\u01a1m, kh\u00f4ng kh\u00ed v\u00e0o x\u0103m xe c\u00f2n n\u00f3ng, sau m\u1ed9t th\u1eddi gian kh\u00f4ng kh\u00ed ngu\u1ed9i \u0111i v\u00e0 co l\u1ea1i l\u00e0m cho x\u0103m xe b\u1ecb x\u1eb9p.","B. V\u00ec gi\u1eefa c\u00e1c ph\u00e2n t\u1eed c\u1ee7a ch\u1ea5t l\u00e0m x\u0103m xe c\u00f3 kho\u1ea3ng c\u00e1ch n\u00ean kh\u00f4ng kh\u00ed c\u00f3 th\u1ec3 tho\u00e1t qua \u0111\u00f3 ra ngo\u00e0i.","C. V\u00ec x\u0103m xe l\u00e0m b\u1eb1ng cao su n\u00ean t\u1ef1 n\u00f3 co l\u1ea1i.","D. V\u00ec kh\u00f4ng kh\u00ed trong x\u0103m xe t\u1ef1 thu nh\u1ecf th\u1ec3 t\u00edch c\u1ee7a n\u00f3."],"hint":"","explain":"<span class='basic_left'>X\u0103m xe \u0111\u1ea1p c\u00f2n t\u1ed1t \u0111\u00e3 b\u01a1m c\u0103ng, \u0111\u1ec3 l\u00e2u ng\u00e0y v\u1eabn b\u1ecb x\u1eb9p v\u00ec gi\u1eefa c\u00e1c ph\u00e2n t\u1eed c\u1ee7a ch\u1ea5t l\u00e0m x\u0103m xe c\u00f3 kho\u1ea3ng c\u00e1ch n\u00ean kh\u00f4ng kh\u00ed c\u00f3 th\u1ec3 tho\u00e1t qua \u0111\u00f3 ra ngo\u00e0i.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2832},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"Ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang. Ch\u1ea5t r\u1eafn c\u00f3 h\u00ecnh d\u1ea1ng v\u00e0 th\u1ec3 t\u00edch x\u00e1c \u0111\u1ecbnh l\u00e0 do trong ch\u1ea5t r\u1eafn:","select":["A. L\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t r\u1eafn l\u00e0 r\u1ea5t l\u1edbn, c\u00e1c ph\u00e2n t\u1eed ch\u1ec9 dao \u0111\u1ed9ng kh\u00f4ng ng\u1eebng quanh m\u1ed9t v\u1ecb tr\u00ed x\u00e1c \u0111\u1ecbnh.","B. L\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t r\u1eafn l\u00e0 r\u1ea5t y\u1ebfu, c\u00e1c ph\u00e2n t\u1eed ch\u1ec9 dao \u0111\u1ed9ng kh\u00f4ng ng\u1eebng quanh m\u1ed9t v\u1ecb tr\u00ed x\u00e1c \u0111\u1ecbnh.","C. L\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t r\u1eafn l\u00e0 r\u1ea5t l\u1edbn, c\u00e1c ph\u00e2n t\u1eed ch\u1ec9 \u0111\u1ee9ng y\u00ean t\u1ea1i m\u1ed9t v\u1ecb tr\u00ed x\u00e1c \u0111\u1ecbnh.","D. C\u00e1c ph\u01b0\u01a1ng \u00e1n \u0111\u01b0a ra \u0111\u1ec1u sai."],"hint":"","explain":"<span class='basic_left'>Ch\u1ea5t r\u1eafn c\u00f3 h\u00ecnh d\u1ea1ng v\u00e0 th\u1ec3 t\u00edch x\u00e1c \u0111\u1ecbnh l\u00e0 do trong ch\u1ea5t r\u1eafn l\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t r\u1eafn l\u00e0 r\u1ea5t l\u1edbn, c\u00e1c ph\u00e2n t\u1eed ch\u1ec9 dao \u0111\u1ed9ng kh\u00f4ng ng\u1eebng quanh m\u1ed9t v\u1ecb tr\u00ed x\u00e1c \u0111\u1ecbnh. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2833},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang. Ch\u1ea5t kh\u00ed kh\u00f4ng c\u00f3 h\u00ecnh d\u1ea1ng v\u00e0 th\u1ec3 t\u00edch x\u00e1c \u0111\u1ecbnh l\u00e0 do trong ch\u1ea5t kh\u00ed: ","select":["A. L\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t kh\u00ed l\u00e0 y\u1ebfu h\u01a1n ch\u1ea5t r\u1eafn, c\u00e1c ph\u00e2n t\u1eed dao \u0111\u1ed9ng t\u01b0\u01a1ng \u0111\u1ed1i t\u1ef1 do h\u01a1n so v\u1edbi trong ch\u1ea5t r\u1eafn.","B. L\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t kh\u00ed l\u00e0 r\u1ea5t y\u1ebfu, c\u00e1c ph\u00e2n t\u1eed chuy\u1ec3n \u0111\u1ed9ng t\u1ef1 do v\u1ec1 m\u1ecdi ph\u00eda.","C. L\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t kh\u00ed l\u00e0 r\u1ea5t l\u1edbn, c\u00e1c ph\u00e2n t\u1eed ch\u1ec9 dao \u0111\u1ed9ng kh\u00f4ng ng\u1eebng quanh m\u1ed9t v\u1ecb tr\u00ed x\u00e1c \u0111\u1ecbnh.","D. T\u1ea5t c\u1ea3 c\u00e1c ph\u01b0\u01a1ng \u00e1n \u0111\u01b0a ra \u0111\u1ec1u sai."],"hint":"","explain":"<span class='basic_left'>Ch\u1ea5t kh\u00ed kh\u00f4ng c\u00f3 h\u00ecnh d\u1ea1ng v\u00e0 th\u1ec3 t\u00edch x\u00e1c \u0111\u1ecbnh l\u00e0 do trong ch\u1ea5t kh\u00ed l\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t kh\u00ed l\u00e0 r\u1ea5t y\u1ebfu, c\u00e1c ph\u00e2n t\u1eed chuy\u1ec3n \u0111\u1ed9ng t\u1ef1 do v\u1ec1 m\u1ecdi ph\u00eda.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2834},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[3]],"list":[{"point":5,"ques":"Ch\u1ecdn c\u00e2u tr\u1ea3 l\u1eddi \u0111\u00fang. Ch\u1ea5t l\u1ecfng c\u00f3 th\u1ec3 t\u00edch x\u00e1c \u0111\u1ecbnh, nh\u01b0ng h\u00ecnh d\u1ea1ng kh\u00f4ng x\u00e1c \u0111\u1ecbnh l\u00e0 do trong ch\u1ea5t l\u1ecfng: ","select":["A. L\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t l\u1ecfng l\u00e0 r\u1ea5t l\u1edbn, c\u00e1c ph\u00e2n t\u1eed ch\u1ec9 dao \u0111\u1ed9ng kh\u00f4ng ng\u1eebng quanh m\u1ed9t v\u1ecb tr\u00ed x\u00e1c \u0111\u1ecbnh.","B. L\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t l\u1ecfng l\u00e0 r\u1ea5t y\u1ebfu, c\u00e1c ph\u00e2n t\u1eed dao \u0111\u1ed9ng t\u1ef1 do v\u1ec1 m\u1ecdi ph\u00eda.","C. L\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t l\u1ecfng l\u00e0 y\u1ebfu h\u01a1n ch\u1ea5t r\u1eafn, c\u00e1c ph\u00e2n t\u1eed dao \u0111\u1ed9ng t\u01b0\u01a1ng \u0111\u1ed1i t\u1ef1 do h\u01a1n so v\u1edbi trong ch\u1ea5t r\u1eafn.","D. T\u1ea5t c\u1ea3 c\u00e1c ph\u01b0\u01a1ng \u00e1n \u0111\u01b0a ra \u0111\u1ec1u sai."],"hint":"","explain":"<span class='basic_left'>Ch\u1ea5t l\u1ecfng c\u00f3 th\u1ec3 t\u00edch x\u00e1c \u0111\u1ecbnh, nh\u01b0ng h\u00ecnh d\u1ea1ng kh\u00f4ng x\u00e1c \u0111\u1ecbnh l\u00e0 do trong ch\u1ea5t l\u1ecfng v\u00ec l\u1ef1c li\u00ean k\u1ebft gi\u1eefa c\u00e1c ph\u00e2n t\u1eed ch\u1ea5t l\u1ecfng l\u00e0 y\u1ebfu h\u01a1n ch\u1ea5t r\u1eafn, c\u00e1c ph\u00e2n t\u1eed dao \u0111\u1ed9ng t\u01b0\u01a1ng \u0111\u1ed1i t\u1ef1 do h\u01a1n so v\u1edbi trong ch\u1ea5t r\u1eafn. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 C.<\/span><\/span> ","column":1}]}],"id_ques":2835},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"Th\u1ea3 m\u1ed9t c\u1ee5c \u0111\u01b0\u1eddng v\u00e0o m\u1ed9t c\u1ed1c n\u01b0\u1edbc r\u1ed3i khu\u1ea5y l\u00ean, \u0111\u01b0\u1eddng tan v\u00e0 n\u01b0\u1edbc c\u00f3 v\u1ecb ng\u1ecdt. C\u00e2u gi\u1ea3i th\u00edch n\u00e0o sau \u0111\u00e2y l\u00e0 \u0111\u00fang?","select":["A. V\u00ec khu\u1ea5y nhi\u1ec1u n\u01b0\u1edbc v\u00e0 \u0111\u01b0\u1eddng c\u00f9ng n\u00f3ng l\u00ean.","B. V\u00ec khi khu\u1ea5y l\u00ean th\u00ec c\u00e1c ph\u00e2n t\u1eed \u0111\u01b0\u1eddng xen v\u00e0o kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc.","C. V\u00ec khi b\u1ecf \u0111\u01b0\u1eddng v\u00e0o v\u00e0 khu\u1ea5y l\u00ean th\u1ec3 t\u00edch n\u01b0\u1edbc trong c\u1ed1c t\u0103ng.","D. M\u1ed9t c\u00e1ch gi\u1ea3i th\u00edch kh\u00e1c."],"hint":"","explain":"<span class='basic_left'>Th\u1ea3 m\u1ed9t c\u1ee5c \u0111\u01b0\u1eddng v\u00e0o m\u1ed9t c\u1ed1c n\u01b0\u1edbc r\u1ed3i khu\u1ea5y l\u00ean, \u0111\u01b0\u1eddng tan v\u00e0 n\u01b0\u1edbc c\u00f3 v\u1ecb ng\u1ecdt v\u00ec khi khu\u1ea5y l\u00ean th\u00ec c\u00e1c ph\u00e2n t\u1eed \u0111\u01b0\u1eddng xen v\u00e0o kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":1}]}],"id_ques":2836},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[1]],"list":[{"point":5,"ques":"T\u1ea1i sao c\u00e1 h\u00f4 h\u1ea5p \u0111\u01b0\u1ee3c trong n\u01b0\u1edbc?","select":["A. C\u00e1c ph\u00e2n t\u1eed Oxi xen v\u00e0o c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc nh\u1edd kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc.","B. C\u00e1 kh\u00f4ng c\u1ea7n Oxi \u0111\u1ec3 h\u00f4 h\u1ea5p.","C. C\u00e1 c\u00f3 kh\u1ea3 n\u0103ng \u0111\u1eb7c bi\u1ec7t.","D. T\u1ea5t c\u1ea3 \u0111\u1ec1u \u0111\u00fang."],"hint":"","explain":"<span class='basic_left'>C\u00e1c ph\u00e2n t\u1eed Oxi xen v\u00e0o c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc nh\u1edd kho\u1ea3ng c\u00e1ch gi\u1eefa c\u00e1c ph\u00e2n t\u1eed n\u01b0\u1edbc n\u00ean c\u00e1 h\u00f4 h\u1ea5p \u0111\u01b0\u1ee3c trong n\u01b0\u1edbc.<br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 A.<\/span><\/span> ","column":1}]}],"id_ques":2837},{"time":24,"part":[{"title":"L\u1ef1a ch\u1ecdn \u0111\u00e1p \u00e1n \u0111\u00fang nh\u1ea5t","title_trans":"","temp":"multiple_choice","correct":[[2]],"list":[{"point":5,"ques":"C\u00e1c ch\u1ea5t \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb: ","select":["A. T\u1ebf b\u00e0o.","B. C\u00e1c nguy\u00ean t\u1eed, ph\u00e2n t\u1eed.","C. C\u00e1c h\u1ee3p ch\u1ea5t.","D. C\u00e1c m\u00f4."],"hint":"","explain":"<span class='basic_left'>C\u00e1c ch\u1ea5t \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb c\u00e1c nguy\u00ean t\u1eed, ph\u00e2n t\u1eed. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 B.<\/span><\/span> ","column":2}]}],"id_ques":2838},{"time":24,"part":[{"title":"","title_trans":"","temp":"multiple_choice","correct":[[4]],"list":[{"point":5,"ques":"Ch\u1ecdn ph\u00e1t bi\u1ec3u sai:","select":["A. C\u00e1c ch\u1ea5t \u0111\u01b0\u1ee3c c\u1ea5u t\u1ea1o t\u1eeb c\u00e1c h\u1ea1t nh\u1ecf ri\u00eang bi\u1ec7t g\u1ecdi l\u00e0 ph\u00e2n t\u1eed, nguy\u00ean t\u1eed.","B. Nguy\u00ean t\u1eed kh\u00f4ng ph\u1ea3i \u0111\u01a1n v\u1ecb nh\u1ecf nh\u1ea5t c\u1ee7a v\u1eadt ch\u1ea5t","C. Ph\u00e2n t\u1eed l\u00e0 m\u1ed9t nh\u00f3m c\u00e1c nguy\u00ean t\u1eed k\u1ebft h\u1ee3p l\u1ea1i.","D. Gi\u1eefa c\u00e1c nguy\u00ean t\u1eed kh\u00f4ng c\u00f3 kho\u1ea3ng c\u00e1ch."],"hint":"","explain":"<span class='basic_left'>Gi\u1eefa c\u00e1c nguy\u00ean t\u1eed c\u00f3 kho\u1ea3ng c\u00e1ch. <br\/> <span class='basic_pink'>V\u1eady \u0111\u00e1p \u00e1n \u0111\u00fang l\u00e0 D.<\/span><\/span> ","column":1}]}],"id_ques":2839}],"lesson":{"save":0,"level":2}}