Quiz — DS2 LPKef 2024.pdf

Question 1 sur 10 20:00

[{"id":43270,"question":"Quelle est l'unité de mesure de la force dans le système international ?","option_a":"Newton (N)","option_b":"Joule (J)","option_c":"Watt (W)","option_d":"Pascal (Pa)","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'unité de mesure de la force est le Newton (N), en hommage à Isaac Newton.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Newton (N)\", \"b\": \"Joule (J)\", \"c\": \"Watt (W)\", \"d\": \"Pascal (Pa)","_debug_options_count":4},{"id":43271,"question":"Vrai ou Faux ? La vitesse moyenne est toujours égale à la vitesse instantanée.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"La vitesse moyenne est le rapport de la distance parcourue sur le temps écoulé, tandis que la vitesse instantanée est la vitesse à un instant précis.","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":43272,"question":"Quelle formule relie la force, la masse et l'accélération ?","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 deuxième loi de Newton stipule que la force est égale au produit de la masse par l'accélération (F = m × a).","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":43273,"question":"Vrai ou Faux ? Une réaction acido-basique produit toujours de l'eau.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Une réaction acido-basique produit de l'eau uniquement si les réactifs sont un acide et une base forte.","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":43274,"question":"Quel est le nombre d'oxydation de l'oxygène dans la molécule O2 ?","option_a":"0","option_b":"+2","option_c":"-2","option_d":"+1","option_e":"","option_f":"","bonne_reponse":"a","explication":"Dans la molécule O2, l'oxygène a un nombre d'oxydation de 0 car il s'agit d'une molécule diatomique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"0\", \"b\": \"+2\", \"c\": \"-2\", \"d\": \"+1\"}}","_debug_options_count":4},{"id":43275,"question":"Quelle est la formule de l'énergie cinétique ?","option_a":"Ec = ½ m v²","option_b":"Ec = m v","option_c":"Ec = m g h","option_d":"Ec = ½ m g h","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'énergie cinétique est donnée par la formule Ec = ½ m v², où m est la masse et v la vitesse.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Ec = ½ m v²\", \"b\": \"Ec = m v\", \"c\": \"Ec = m g h\", \"d\": \"Ec = ½","_debug_options_count":4},{"id":43276,"question":"Vrai ou Faux ? Un acide est une espèce chimique capable de libérer des ions H+.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Un acide est défini comme une espèce chimique capable de libérer des ions H+ en solution aqueuse.","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":43277,"question":"Quelle est la relation entre la pression, le volume et la température pour un gaz parfait ?","option_a":"P V = n R T","option_b":"P V = m R T","option_c":"P T = n V R","option_d":"P V = n T R","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi des gaz parfaits est donnée par P V = n R T, où P est la pression, V le volume, n la quantité de matière, R la constante des gaz parfaits et T la température en Kelvin.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"P V = n R T\", \"b\": \"P V = m R T\", \"c\": \"P T = n V R\", \"d\": \"P V =","_debug_options_count":4},{"id":43278,"question":"Quel est le pH d'une solution neutre à 25°C ?","option_a":"pH = 0","option_b":"pH = 7","option_c":"pH = 14","option_d":"pH = 10","option_e":"","option_f":"","bonne_reponse":"b","explication":"À 25°C, une solution neutre a un pH de 7, car la concentration en ions H+ est égale à 10^-7 mol\/L.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"pH = 0\", \"b\": \"pH = 7\", \"c\": \"pH = 14\", \"d\": \"pH = 10\"}}","_debug_options_count":4},{"id":43279,"question":"Vrai ou Faux ? La tension électrique se mesure en ampères.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"La tension électrique se mesure en volts (V), tandis que l'intensité du courant se mesure en ampères (A).","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}]