Quiz — Lycée Pilote Sfax - DC 3 2013.pdf

Question 1 sur 10 20:00

[{"id":18029,"question":"Quelle est la formule chimique de l'eau ?","option_a":"H2O","option_b":"CO2","option_c":"NaCl","option_d":"O2","option_e":"","option_f":"","bonne_reponse":"a","explication":"La formule chimique de l'eau est H2O, composée de deux atomes d'hydrogène et d'un atome d'oxygène.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"H2O\", \"b\": \"CO2\", \"c\": \"NaCl\", \"d\": \"O2\"}}","_debug_options_count":4},{"id":18030,"question":"La force de gravité est-elle une force attractive ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Oui, la force de gravité est une force attractive qui attire les objets vers le centre de la Terre.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":18031,"question":"Quel est le pH d'une solution neutre ?","option_a":"0","option_b":"7","option_c":"14","option_d":"10","option_e":"","option_f":"","bonne_reponse":"b","explication":"Une solution neutre a un pH de 7. En dessous de 7, la solution est acide, et au-dessus, elle est basique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"0\", \"b\": \"7\", \"c\": \"14\", \"d\": \"10\"}}","_debug_options_count":4},{"id":18032,"question":"Un objet en mouvement rectiligne uniforme a une accélération nulle.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. Dans un mouvement rectiligne uniforme, la vitesse est constante, donc l'accélération est nulle.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":18033,"question":"Quelle est la loi de Lavoisier concernant les réactions chimiques ?","option_a":"La masse des réactifs est égale à la masse des produits","option_b":"Les réactions sont toujours exothermiques","option_c":"Les atomes se transforment en énergie","option_d":"Les réactions sont réversibles","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi de Lavoisier stipule que rien ne se perd, rien ne se crée, tout se transforme : la masse des réactifs est égale à la masse des produits.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"La masse des réactifs est égale à la masse des produits\", \"b\":","_debug_options_count":4},{"id":18034,"question":"La lumière se propage plus vite dans l'eau que dans l'air.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Faux. La lumière se propage plus lentement dans l'eau que dans l'air en raison de la différence d'indice de réfraction.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":18035,"question":"Quel est le symbole chimique de l'or ?","option_a":"Ag","option_b":"Au","option_c":"Fe","option_d":"Cu","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le symbole chimique de l'or est Au, dérivé du mot latin 'Aurum'.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Ag\", \"b\": \"Au\", \"c\": \"Fe\", \"d\": \"Cu\"}}","_debug_options_count":4},{"id":18036,"question":"Une réaction endothermique libère de la chaleur.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Faux. Une réaction endothermique absorbe de la chaleur, contrairement à une réaction exothermique qui en libère.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":18037,"question":"Quelle est la relation entre la force, la masse et l'accélération selon la 2ème loi de Newton ?","option_a":"F = m * a","option_b":"F = m \/ a","option_c":"F = a \/ m","option_d":"F = m + a","option_e":"","option_f":"","bonne_reponse":"a","explication":"La 2ème loi de Newton s'exprime par F = m * a, où F est la force, m la masse et a l'accélération.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"F = m * a\", \"b\": \"F = m \/ a\", \"c\": \"F = a \/ m\", \"d\": \"F = m + a\"}","_debug_options_count":4},{"id":18038,"question":"Les acides ont un pH inférieur à 7.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai. Les solutions acides ont un pH inférieur à 7, tandis que les solutions basiques ont un pH supérieur à 7.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4}]