{"common":{"save":0,"post_id":"7769","level":3,"total":10,"point":10,"point_extra":0},"segment":[{"id":"7280","post_id":"7769","mon_id":"1159539","chapter_id":"1159541","question":"<p>D\u1ea5u hi\u1ec7u nào giúp ta có kh\u1eb3ng \u0111\u1ecbnh có ph\u1ea3n \u1ee9ng hoá h\u1ecdc x\u1ea3y ra?<\/p>","options":["A. Có ch\u1ea5t k\u1ebft t\u1ee7a (ch\u1ea5t không tan).","B. Có ch\u1ea5t khí thoát ra (s\u1ee7i b\u1ecdt).","C. Có s\u1ef1 thay \u0111\u1ed5i màu s\u1eafc.","D. M\u1ed9t trong s\u1ed1 các d\u1ea5u hi\u1ec7u trên."],"correct":"4","level":"3","hint":"<p>Hãy suy ngh\u0129 v\u1ec1 nh\u1eefng thay \u0111\u1ed5i có th\u1ec3 quan sát \u0111\u01b0\u1ee3c khi m\u1ed9t ph\u1ea3n \u1ee9ng hoá h\u1ecdc di\u1ec5n ra. Có th\u1ec3 là s\u1ef1 xu\u1ea5t hi\u1ec7n c\u1ee7a m\u1ed9t ch\u1ea5t m\u1edbi ho\u1eb7c nh\u1eefng thay \u0111\u1ed5i rõ r\u1ec7t v\u1ec1 tính ch\u1ea5t.<\/p>","answer":"<p>\u0110áp án \u0111úng: <strong>D. M\u1ed9t trong s\u1ed1 các d\u1ea5u hi\u1ec7u trên.<\/strong><\/p><p>Khi có ph\u1ea3n \u1ee9ng hoá h\u1ecdc x\u1ea3y ra, ta có th\u1ec3 quan sát các d\u1ea5u hi\u1ec7u nh\u01b0 s\u1ef1 t\u1ea1o thành ch\u1ea5t k\u1ebft t\u1ee7a, s\u1ef1 thoát ra ch\u1ea5t khí, ho\u1eb7c s\u1ef1 thay \u0111\u1ed5i màu s\u1eafc. T\u1ea5t c\u1ea3 nh\u1eefng d\u1ea5u hi\u1ec7u này \u0111\u1ec1u ch\u1ec9 ra r\u1eb1ng ph\u1ea3n \u1ee9ng hoá h\u1ecdc \u0111ã di\u1ec5n ra.\u200b\u200b\u200b\u200b\u200b\u200b\u200b<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-02-17 22:42:19","option_type":"txt","len":3},{"id":"7281","post_id":"7769","mon_id":"1159539","chapter_id":"1159541","question":"<p>Khi cho m\u1ed9t m\u1ea9u vôi s\u1ed1ng vào n\u01b0\u1edbc, m\u1ea9u vôi s\u1ed1ng tan ra, th\u1ea5y n\u01b0\u1edbc nóng lên. D\u1ea5u hi\u1ec7u ch\u1ee9ng t\u1ecf \u0111ã có ph\u1ea3n \u1ee9ng hóa h\u1ecdc x\u1ea3y ra \u0111úng nh\u1ea5t là?<\/p>","options":["A. M\u1ea9u vôi s\u1ed1ng tan ra, n\u01b0\u1edbc nóng lên.","B. Xu\u1ea5t hi\u1ec7n ch\u1ea5t khí không màu.","C. Xu\u1ea5t hi\u1ec7n k\u1ebft t\u1ee7a tr\u1eafng.","D. M\u1ea9u vôi s\u1ed1ng tan trong n\u01b0\u1edbc."],"correct":"1","level":"3","hint":"<p>Hãy chú ý \u0111\u1ebfn hi\u1ec7n t\u01b0\u1ee3ng nhi\u1ec7t \u0111\u1ed9 thay \u0111\u1ed5i khi có s\u1ef1 tan ra c\u1ee7a m\u1ed9t ch\u1ea5t trong n\u01b0\u1edbc. \u0110ây có th\u1ec3 là d\u1ea5u hi\u1ec7u cho th\u1ea5y m\u1ed9t ph\u1ea3n \u1ee9ng hóa h\u1ecdc \u0111ang x\u1ea3y ra.<\/p>","answer":"<p>\u0110áp án \u0111úng: <strong>A. M\u1ea9u vôi s\u1ed1ng tan ra, n\u01b0\u1edbc nóng lên.<\/strong><\/p><p>Khi vôi s\u1ed1ng (CaO) tan trong n\u01b0\u1edbc, ph\u1ea3n \u1ee9ng t\u1ea1o thành vôi tôi (Ca(OH)\u2082) và gi\u1ea3i phóng nhi\u1ec7t. Nhi\u1ec7t \u0111\u1ed9 n\u01b0\u1edbc t\u0103ng lên chính là d\u1ea5u hi\u1ec7u c\u1ee7a m\u1ed9t ph\u1ea3n \u1ee9ng hóa h\u1ecdc \u0111ang di\u1ec5n ra.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-02-17 22:43:10","option_type":"txt","len":3},{"id":"7282","post_id":"7769","mon_id":"1159539","chapter_id":"1159541","question":"<p>Trong 1 ph\u1ea3n \u1ee9ng hóa h\u1ecdc, các ch\u1ea5t ph\u1ea3n \u1ee9ng và s\u1ea3n ph\u1ea9m ph\u1ea3i ch\u1ee9a:<\/p>","options":["A. S\u1ed1 nguyên t\u1eed trong m\u1ed7i ch\u1ea5t","B. S\u1ed1 nguyên t\u1eed m\u1ed7i nguyên t\u1ed1","C. S\u1ed1 nguyên t\u1ed1 t\u1ea1o ra ch\u1ea5t","D. S\u1ed1 phân t\u1eed c\u1ee7a m\u1ed7i ch\u1ea5t"],"correct":"2","level":"3","hint":"<p>Chú ý \u0111\u1ebfn nguyên lý b\u1ea3o toàn kh\u1ed1i l\u01b0\u1ee3ng trong ph\u1ea3n \u1ee9ng hóa h\u1ecdc. Các ch\u1ea5t ph\u1ea3n \u1ee9ng và s\u1ea3n ph\u1ea9m c\u1ea7n ph\u1ea3i có s\u1ef1 cân b\u1eb1ng v\u1ec1 m\u1eb7t s\u1ed1 nguyên t\u1eed.<\/p>","answer":"<p>\u0110áp án \u0111úng: <strong>B. S\u1ed1 nguyên t\u1eed m\u1ed7i nguyên t\u1ed1<\/strong><\/p><p>Trong m\u1ed9t ph\u1ea3n \u1ee9ng hóa h\u1ecdc, s\u1ed1 nguyên t\u1eed c\u1ee7a m\u1ed7i nguyên t\u1ed1 ph\u1ea3i \u0111\u01b0\u1ee3c b\u1ea3o toàn, t\u1ee9c là s\u1ed1 nguyên t\u1eed c\u1ee7a m\u1ed7i nguyên t\u1ed1 trong các ch\u1ea5t ph\u1ea3n \u1ee9ng ph\u1ea3i b\u1eb1ng s\u1ed1 nguyên t\u1eed c\u1ee7a nó trong các s\u1ea3n ph\u1ea9m.<\/p>","type":"choose","extra_type":"classic","time":"0","user_id":"139","test":"0","date":"2025-02-17 22:44:07","option_type":"txt","len":2}]}