Quiz — Lycée Pilote Sfax - DS 1 2020(1).pdf

Question 1 sur 10 20:00

[{"id":33320,"question":"Quel est le symbole chimique de l'oxygène ?","option_a":"O","option_b":"Ox","option_c":"O2","option_d":"Oxy","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le symbole chimique de l'oxygène est 'O', représentant un atome d'oxygène. 'O2' désigne la molécule de dioxygène, composée de deux atomes 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\": \"O\", \"b\": \"Ox\", \"c\": \"O2\", \"d\": \"Oxy\"}}","_debug_options_count":4},{"id":33321,"question":"La force de gravité est-elle une force de contact ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"La force de gravité est une force à distance, elle agit sans contact physique entre les objets (ex : attraction Terre-Lune).","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":33322,"question":"Quelle est l'unité de mesure de la vitesse dans le système international (SI) ?","option_a":"km\/h","option_b":"m\/s","option_c":"km\/s","option_d":"m\/h","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'unité SI de la vitesse est le mètre par seconde (m\/s). Le km\/h est une unité courante mais non standard dans le SI.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"km\/h\", \"b\": \"m\/s\", \"c\": \"km\/s\", \"d\": \"m\/h\"}}","_debug_options_count":4},{"id":33323,"question":"Une cellule eucaryote possède-t-elle un noyau défini ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Les cellules eucaryotes (animales, végétales, fongiques) possèdent un noyau délimité par une membrane nucléaire, contrairement aux cellules procaryotes (bactéries).","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":33324,"question":"Quel est le résultat de la réaction chimique : 2H2 + O2 → ?","option_a":"H2O","option_b":"2H2O","option_c":"H2O2","option_d":"HO","option_e":"","option_f":"","bonne_reponse":"b","explication":"La réaction équilibrée donne 2H2O (eau), car 2 molécules de dihydrogène réagissent avec 1 molécule de dioxygène pour former 2 molécules d'eau.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"H2O\", \"b\": \"2H2O\", \"c\": \"H2O2\", \"d\": \"HO\"}}","_debug_options_count":4},{"id":33325,"question":"La photosynthèse a-t-elle lieu uniquement la nuit ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"La photosynthèse se déroule principalement le jour, car elle nécessite la lumière du soleil pour produire de l'énergie (glucose) à partir de CO2 et d'eau.","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":33326,"question":"Quelle est la formule de la vitesse moyenne ?","option_a":"v = d × t","option_b":"v = d \/ t","option_c":"v = t \/ d","option_d":"v = a × t","option_e":"","option_f":"","bonne_reponse":"b","explication":"La vitesse moyenne se calcule par la formule v = d \/ t, où 'd' est la distance parcourue et 't' le temps écoulé.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"v = d × t\", \"b\": \"v = d \/ t\", \"c\": \"v = t \/ d\", \"d\": \"v = a × t","_debug_options_count":4},{"id":33327,"question":"Un ion positif est-il appelé cation ou anion ?","option_a":"Cation","option_b":"Anion","option_c":"Électron","option_d":"Proton","option_e":"","option_f":"","bonne_reponse":"a","explication":"Un ion positif, ayant perdu des électrons, est appelé cation (ex : Na+). Un ion négatif est un anion (ex : Cl-).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Cation\", \"b\": \"Anion\", \"c\": \"Électron\", \"d\": \"Proton\"}}","_debug_options_count":4},{"id":33328,"question":"La loi d'Ohm s'applique-t-elle à tous les conducteurs ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"La loi d'Ohm (U = R × I) s'applique uniquement aux conducteurs ohmiques (résistances pures), pas aux semi-conducteurs ou supraconducteurs.","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":33329,"question":"Quel est le rôle principal des chloroplastes dans une cellule végétale ?","option_a":"Stocker l'eau","option_b":"Produire de l'énergie (photosynthèse)","option_c":"Synthétiser des protéines","option_d":"Digérer les nutriments","option_e":"","option_f":"","bonne_reponse":"b","explication":"Les chloroplastes contiennent de la chlorophylle et permettent la photosynthèse, processus de production d'énergie (glucose) à partir de lumière, CO2 et eau.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"Stocker l'eau\", \"b\": \"Produire de l'énergie (photosynthèse)\", \"","_debug_options_count":4}]