Quiz — Magazine devoir d'évaluation N°1 section sc-exp (1).pdf

Question 1 sur 10 20:00

[{"id":33870,"question":"Quelle est la formule chimique du glucose ?","option_a":"C6H12O6","option_b":"C5H10O5","option_c":"C12H22O11","option_d":"CH4","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le glucose est un monosaccharide de formule C6H12O6, essentiel dans le métabolisme énergétique des êtres vivants.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"C6H12O6\", \"b\": \"C5H10O5\", \"c\": \"C12H22O11\", \"d\": \"CH4\"}}","_debug_options_count":4},{"id":33871,"question":"La photosynthèse produit-elle du dioxygène ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La photosynthèse, réalisée par les plantes vertes, produit bien du dioxygène (O2) comme sous-produit de la conversion du CO2 en glucose.","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":33872,"question":"Quel est le rôle principal des mitochondries dans la cellule ?","option_a":"Production d'énergie (respiration cellulaire)","option_b":"Stockage des nutriments","option_c":"Synthèse des protéines","option_d":"Division cellulaire","option_e":"","option_f":"","bonne_reponse":"a","explication":"Les mitochondries sont les centrales énergétiques de la cellule, où se déroule la respiration cellulaire produisant de l'ATP.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Production d'énergie (respiration cellulaire)\", \"b\": \"Stockage d","_debug_options_count":4},{"id":33873,"question":"La loi d'Ohm s'exprime par la formule :","option_a":"U = R × I","option_b":"P = U × I","option_c":"E = m × g × h","option_d":"F = m × a","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi d'Ohm relie la tension U, la résistance R et l'intensité I du courant par la formule U = R × I.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"U = R × I\", \"b\": \"P = U × I\", \"c\": \"E = m × g × h\", \"d\": \"F =","_debug_options_count":4},{"id":33874,"question":"Un acide a un pH inférieur à 7.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Par définition, un acide a un pH inférieur à 7, tandis qu'une base a un pH supérieur à 7. Un pH de 7 correspond à une solution neutre.","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":33875,"question":"Quelle est la vitesse de la lumière dans le vide ?","option_a":"3 × 10^8 m\/s","option_b":"1,5 × 10^8 m\/s","option_c":"3 × 10^5 km\/s","option_d":"A et C sont correctes","option_e":"","option_f":"","bonne_reponse":"d","explication":"La vitesse de la lumière dans le vide est d'environ 3 × 10^8 m\/s, soit 300 000 km\/s. Les deux réponses A et C sont donc équivalentes.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"d\", \"options\": {\"a\": \"3 × 10^8 m\/s\", \"b\": \"1,5 × 10^8 m\/s\", \"c\": \"3 × 10^5 km\/s\", \"d","_debug_options_count":4},{"id":33876,"question":"Quel est le produit de la réaction entre un acide et une base ?","option_a":"Un sel et de l'eau","option_b":"Un gaz et de l'eau","option_c":"Un oxyde et un gaz","option_d":"Un métal et un gaz","option_e":"","option_f":"","bonne_reponse":"a","explication":"La réaction entre un acide et une base est une réaction de neutralisation produisant un sel et de l'eau.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Un sel et de l'eau\", \"b\": \"Un gaz et de l'eau\", \"c\": \"Un oxyde et","_debug_options_count":4},{"id":33877,"question":"La gravité terrestre est-elle constante partout sur Terre ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"La gravité terrestre varie légèrement selon l'altitude et la latitude. Elle n'est donc pas strictement constante.","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":33878,"question":"Quelle est la formule de l'acide sulfurique ?","option_a":"H2SO4","option_b":"HCl","option_c":"HNO3","option_d":"CH3COOH","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'acide sulfurique, un acide fort, a pour formule H2SO4. Il est largement utilisé dans l'industrie chimique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"H2SO4\", \"b\": \"HCl\", \"c\": \"HNO3\", \"d\": \"CH3COOH\"}}","_debug_options_count":4},{"id":33879,"question":"Le noyau d'un atome contient des protons et des neutrons.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le noyau atomique est composé de protons (chargés positivement) et de neutrons (sans charge), tandis que les électrons gravitent autour.","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}]