{"common":{"save":0,"post_id":"7841","level":1,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7834","post_id":"7841","mon_id":"1159533","chapter_id":"1159546","question":"<p>Nguyên li\u1ec7u chính dùng \u0111\u1ec3 s\u1ea3n xu\u1ea5t nhôm là<br \/> <\/p>","options":["<strong>A. <\/strong>qu\u1eb7ng manhetit","<strong>B.<\/strong> qu\u1eb7ng bauxite","<strong>C.<\/strong> qu\u1eb7ng sphalerite","<strong>D.<\/strong> qu\u1eb7ng hematite"],"correct":"2","level":"1","hint":"<p>- \u0110ây là lo\u1ea1i qu\u1eb7ng ch\u1ee9a hàm l\u01b0\u1ee3ng cao nhôm oxide (Al\u2082O\u2083), nguyên li\u1ec7u quan tr\u1ecdng \u0111\u1ec3 tinh ch\u1ebf nhôm.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>B. qu\u1eb7ng bauxite<\/strong><\/span><\/p><p>- Nguyên li\u1ec7u chính \u0111\u1ec3 s\u1ea3n xu\u1ea5t nhôm là qu\u1eb7ng <strong>bauxite<\/strong><\/p>","type":"choose","extra_type":"cloud","time":"0","user_id":"127","test":"0","date":"2024-10-16 08:29:59","option_type":"txt","len":0},{"id":"7835","post_id":"7841","mon_id":"1159533","chapter_id":"1159546","question":"<p>Kim lo\u1ea1i nào d\u01b0\u1edbi \u0111ây có th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng cách dùng CO kh\u1eed oxide kim lo\u1ea1i t\u01b0\u01a1ng \u1ee9ng \u1edf nhi\u1ec7t \u0111\u1ed9 cao?<\/p>","options":["<strong>A. <\/strong>Al","<strong>B. <\/strong>Mg","<strong>C.<\/strong> Ca","<strong>D.<\/strong> Fe"],"correct":"4","level":"1","hint":"<p>Carbon monoxide (<strong>CO<\/strong>) có th\u1ec3 kh\u1eed \u0111\u01b0\u1ee3c các oxit kim lo\u1ea1i trung bình và y\u1ebfu, nh\u01b0ng không kh\u1eed \u0111\u01b0\u1ee3c nh\u1eefng kim lo\u1ea1i m\u1ea1nh.<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>D. Fe<\/strong><\/span><\/p><p>- Trong s\u1ed1 các kim lo\u1ea1i trên, ch\u1ec9 <strong>s\u1eaft (Fe)<\/strong> có th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng cách kh\u1eed oxit s\u1eaft (Fe\u2082O\u2083 ho\u1eb7c Fe\u2083O\u2084) b\u1eb1ng CO \u1edf nhi\u1ec7t \u0111\u1ed9 cao.<\/p><p>- \u0110ây chính là ph\u1ea3n \u1ee9ng di\u1ec5n ra trong <strong>lò cao<\/strong> \u0111\u1ec3 s\u1ea3n xu\u1ea5t gang t\u1eeb qu\u1eb7ng s\u1eaft.<\/p>","type":"choose","extra_type":"shape1","time":"0","user_id":"127","test":"0","date":"2024-10-16 08:34:19","option_type":"txt","len":0},{"id":"7836","post_id":"7841","mon_id":"1159533","chapter_id":"1159546","question":"<p>Nhóm các kim lo\u1ea1i \u0111\u1ec1u có th\u1ec3 \u0111\u01b0\u1ee3c \u0111i\u1ec1u ch\u1ebf b\u1eb1ng ph\u01b0\u01a1ng pháp th\u1ee7y luy\u1ec7n là:<br \/> <\/p>","options":["<strong>A. <\/strong>Ba, Au","<strong>B. <\/strong>Al, Cr","<strong>C. <\/strong>Mg, Cu","<strong>D.<\/strong> Cu, Ag"],"correct":"4","level":"1","hint":"<p>Ph\u01b0\u01a1ng pháp <strong>th\u1ee7y luy\u1ec7n<\/strong> là quá trình dùng dung d\u1ecbch \u0111\u1ec3 hòa tan các ion kim lo\u1ea1i t\u1eeb qu\u1eb7ng ho\u1eb7c h\u1ee3p ch\u1ea5t, sau \u0111ó tách chúng ra thành kim lo\u1ea1i nguyên ch\u1ea5t. Ph\u01b0\u01a1ng pháp này phù h\u1ee3p cho các kim lo\u1ea1i <strong>n\u1eb1m sau hydrogen <\/strong>trong dãy H\u0110HH<\/p>","answer":"<p>\u0110áp án \u0111úng: <span style=\"color:#16a085;\"><strong>D. Cu, Ag<\/strong><\/span><\/p><p>Các kim lo\u1ea1i m\u1ea1nh nh\u01b0 Al, Cr, Mg ho\u1eb7c Ba ph\u1ea3i \u0111i\u1ec1u ch\u1ebf b\u1eb1ng ph\u01b0\u01a1ng pháp <strong>\u0111i\u1ec7n phân<\/strong> do tính kim lo\u1ea1i m\u1ea1nh c\u1ee7a chúng.<\/p>","type":"choose","extra_type":"shape2","time":"0","user_id":"127","test":"0","date":"2024-10-16 08:41:23","option_type":"txt","len":0}]}