Quiz — 60.._pH2.pdf

Question 1 sur 10 20:00

[{"id":38250,"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, ce qui signifie qu'elle n'est ni acide ni 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":38251,"question":"Un indicateur coloré change de couleur en fonction du pH de la solution.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"C'est vrai ! Les indicateurs colorés changent de couleur selon le pH de la solution, ce qui permet de l'identifier.","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":38252,"question":"Quelle est la formule de l'ion hydrogène responsable de l'acidité ?","option_a":"H-","option_b":"H+","option_c":"OH-","option_d":"H2O","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'ion hydrogène responsable de l'acidité est H+, présent en grande quantité dans les solutions acides.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"H-\", \"b\": \"H+\", \"c\": \"OH-\", \"d\": \"H2O\"}}","_debug_options_count":4},{"id":38253,"question":"Une solution avec un pH de 3 est :","option_a":"Très basique","option_b":"Faiblement basique","option_c":"Faiblement acide","option_d":"Très acide","option_e":"","option_f":"","bonne_reponse":"d","explication":"Un pH de 3 indique une solution très acide, car il est bien inférieur à 7.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"d\", \"options\": {\"a\": \"Très basique\", \"b\": \"Faiblement basique\", \"c\": \"Faiblement acide","_debug_options_count":4},{"id":38254,"question":"La phénolphtaléine est incolore en milieu acide et rose en milieu basique.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"C'est vrai ! La phénolphtaléine est un indicateur coloré qui devient rose en milieu basique (pH \u003E 8) et incolore en milieu acide.","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":38255,"question":"Quel est le pH d'une solution de soude (NaOH) ?","option_a":"2","option_b":"7","option_c":"12","option_d":"14","option_e":"","option_f":"","bonne_reponse":"c","explication":"La soude (NaOH) est une base forte, son pH est généralement autour de 12 à 14 selon sa concentration.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"2\", \"b\": \"7\", \"c\": \"12\", \"d\": \"14\"}}","_debug_options_count":4},{"id":38256,"question":"Un jus de citron a un pH d'environ 2. Que peut-on en déduire ?","option_a":"C'est une solution basique","option_b":"C'est une solution acide","option_c":"C'est une solution neutre","option_d":"C'est une solution très basique","option_e":"","option_f":"","bonne_reponse":"b","explication":"Un pH de 2 indique une solution très acide, comme le jus de citron.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"C'est une solution basique\", \"b\": \"C'est une solution acide\", \"c\"","_debug_options_count":4},{"id":38257,"question":"Le papier pH permet de mesurer le pH avec précision.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"b","explication":"Faux ! Le papier pH donne une estimation du pH, mais un pH-mètre est plus précis pour une mesure exacte.","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":38258,"question":"Quelle est la valeur du pH d'une solution de vinaigre ?","option_a":"1","option_b":"3","option_c":"7","option_d":"9","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le vinaigre est une solution acide, son pH est généralement autour de 3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"1\", \"b\": \"3\", \"c\": \"7\", \"d\": \"9\"}}","_debug_options_count":4},{"id":38259,"question":"Une solution avec un pH de 8 est :","option_a":"Très acide","option_b":"Faiblement acide","option_c":"Faiblement basique","option_d":"Très basique","option_e":"","option_f":"","bonne_reponse":"c","explication":"Un pH de 8 indique une solution faiblement basique, car il est légèrement supérieur à 7.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"Très acide\", \"b\": \"Faiblement acide\", \"c\": \"Faiblement basique\",","_debug_options_count":4}]