Quiz — Lycée Pilote Sfax - DC 2 2014.pdf

Question 1 sur 10 20:00

[{"id":13914,"question":"Quelle est la formule de la concentration molaire d'une solution ?","option_a":"C = n\/V","option_b":"C = m\/V","option_c":"C = n\/m","option_d":"C = V\/n","option_e":"","option_f":"","bonne_reponse":"a","explication":"La concentration molaire (C) se calcule par le rapport entre la quantité de matière (n) et le volume de la solution (V).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"C = n\/V\", \"b\": \"C = m\/V\", \"c\": \"C = n\/m\", \"d\": \"C = V\/n\"}}","_debug_options_count":4},{"id":13915,"question":"La loi d'Ohm s'applique uniquement aux conducteurs ohmiques.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi d'Ohm (U = R×I) s'applique uniquement aux conducteurs ohmiques, c'est-à-dire ceux dont la résistance est constante.","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":13916,"question":"Quel est le pH d'une solution acide ?","option_a":"pH \u003C 7","option_b":"pH = 7","option_c":"pH \u003E 7","option_d":"pH = 0","option_e":"","option_f":"","bonne_reponse":"a","explication":"Une solution acide a un pH inférieur à 7, indiquant une concentration élevée en ions H+.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"pH \u003C 7\", \"b\": \"pH = 7\", \"c\": \"pH \u003E 7\", \"d\": \"pH = 0\"}}","_debug_options_count":4},{"id":13917,"question":"La vitesse de la lumière dans le vide est d'environ :","option_a":"3×10^5 m\/s","option_b":"3×10^6 m\/s","option_c":"3×10^8 m\/s","option_d":"3×10^10 m\/s","option_e":"","option_f":"","bonne_reponse":"c","explication":"La vitesse de la lumière dans le vide est une constante fondamentale égale à 3×10^8 mètres par seconde.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"3×10^5 m\/s\", \"b\": \"3×10^6 m\/s\", \"c\": \"3×10^8 m\/s\", \"d\": \"3×10","_debug_options_count":4},{"id":13918,"question":"Un miroir plan donne toujours une image réelle.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Un miroir plan donne toujours une image virtuelle, droite et de même taille que l'objet.","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":13919,"question":"Quelle est l'unité de la résistance électrique ?","option_a":"Volt","option_b":"Ampère","option_c":"Ohm","option_d":"Watt","option_e":"","option_f":"","bonne_reponse":"c","explication":"L'unité de la résistance électrique dans le système international est l'ohm (Ω).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"Volt\", \"b\": \"Ampère\", \"c\": \"Ohm\", \"d\": \"Watt\"}}","_debug_options_count":4},{"id":13920,"question":"La réaction entre un acide et une base produit toujours de l'eau et un sel.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Cette réaction est appelée neutralisation et produit effectivement de l'eau et un sel.","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":13921,"question":"Quel est le symbole de l'élément chimique sodium ?","option_a":"S","option_b":"Na","option_c":"So","option_d":"Sn","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le symbole chimique du sodium est Na, dérivé de son nom latin 'Natrium'.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"S\", \"b\": \"Na\", \"c\": \"So\", \"d\": \"Sn\"}}","_debug_options_count":4},{"id":13922,"question":"La loi de conservation de l'énergie s'applique-t-elle dans un circuit électrique ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"La loi de conservation de l'énergie stipule que l'énergie totale d'un système isolé reste constante, ce qui s'applique aussi aux circuits électriques.","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":13923,"question":"Quelle est la formule de la puissance électrique ?","option_a":"P = U×I","option_b":"P = U\/I","option_c":"P = I\/U","option_d":"P = U×R","option_e":"","option_f":"","bonne_reponse":"a","explication":"La puissance électrique (P) se calcule par le produit de la tension (U) et de l'intensité du courant (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\": \"P = U×I\", \"b\": \"P = U\/I\", \"c\": \"P = I\/U\", \"d\": \"P = U×R\"}}","_debug_options_count":4}]