Quiz — 642d4746e88c9_énoncé_Série n°1 Les Amides-1-.pdf

Question 1 sur 10 20:00

[{"id":59214,"question":"Quel est le groupe fonctionnel caractéristique des amides ?","option_a":"-COOH","option_b":"-NH2","option_c":"-CONH2","option_d":"-CHO","option_e":"","option_f":"","bonne_reponse":"c","explication":"Le groupe -CONH2 est la signature des amides, où l'azote est lié à un groupe carbonyle (C=O).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"-COOH\", \"b\": \"-NH2\", \"c\": \"-CONH2\", \"d\": \"-CHO\"}}","_debug_options_count":4},{"id":59215,"question":"La formule générale d'un amide primaire est R-CONH2.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"C'est exact : un amide primaire a la structure R-CONH2, avec deux atomes d'hydrogène sur l'azote.","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":59216,"question":"Quel réactif permet de synthétiser un amide à partir d'un chlorure d'acyle ?","option_a":"NH3","option_b":"HCl","option_c":"NaOH","option_d":"CH3OH","option_e":"","option_f":"","bonne_reponse":"a","explication":"L'ammoniac (NH3) réagit avec un chlorure d'acyle (R-COCl) pour former un amide (R-CONH2) et HCl.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"NH3\", \"b\": \"HCl\", \"c\": \"NaOH\", \"d\": \"CH3OH\"}}","_debug_options_count":4},{"id":59217,"question":"L'hydrolyse basique d'un amide donne :","option_a":"un acide carboxylique et NH3","option_b":"un alcool et NH3","option_c":"un sel de carboxylate et NH3","option_d":"un aldéhyde et NH3","option_e":"","option_f":"","bonne_reponse":"c","explication":"En milieu basique, l'hydrolyse d'un amide produit un ion carboxylate (R-COO-) et de l'ammoniac (NH3).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"un acide carboxylique et NH3\", \"b\": \"un alcool et NH3\", \"c\": \"un ","_debug_options_count":4},{"id":59218,"question":"Les amides sont-ils solubles dans l'eau ?","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Oui, grâce aux liaisons hydrogène entre les groupes -NH\/-C=O et les molécules d'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\": \"Vrai\", \"b\": \"Faux\", \"c\": \"\", \"d\": \"\"}}","_debug_options_count":4},{"id":59219,"question":"Quel est le nom IUPAC de CH3-CH2-CONH2 ?","option_a":"Propanamide","option_b":"Éthanamide","option_c":"Butanamide","option_d":"Méthanamide","option_e":"","option_f":"","bonne_reponse":"a","explication":"La chaîne carbonée a 3 atomes de carbone (prop-), et la terminaison '-amide' indique la fonction amide.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"Propanamide\", \"b\": \"Éthanamide\", \"c\": \"Butanamide\", \"d\": \"Métha","_debug_options_count":4},{"id":59220,"question":"La réaction d'un amide avec un alcool en milieu acide donne :","option_a":"un ester et NH3","option_b":"un amide substitué","option_c":"un acide carboxylique","option_d":"un sel d'ammonium","option_e":"","option_f":"","bonne_reponse":"a","explication":"En milieu acide, un amide peut réagir avec un alcool pour former un ester et libérer de l'ammoniac.","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 ester et NH3\", \"b\": \"un amide substitué\", \"c\": \"un acide carb","_debug_options_count":4},{"id":59221,"question":"Les amides tertiaires ne peuvent pas former de liaisons hydrogène.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"C'est vrai : les amides tertiaires (R-CONR2) n'ont pas d'atome d'hydrogène sur l'azote, donc pas de liaisons hydrogène.","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":59222,"question":"Quel composé est obtenu par réaction de l'éthanamide avec NaOH en milieu aqueux ?","option_a":"CH3-COOH et NH3","option_b":"CH3-CH2-NH2 et H2O","option_c":"CH3-COONa et NH3","option_d":"CH3-CHO et NH3","option_e":"","option_f":"","bonne_reponse":"c","explication":"L'hydrolyse basique de l'éthanamide (CH3-CONH2) donne l'éthanoate de sodium (CH3-COONa) et de l'ammoniac.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"CH3-COOH et NH3\", \"b\": \"CH3-CH2-NH2 et H2O\", \"c\": \"CH3-COONa et N","_debug_options_count":4},{"id":59223,"question":"La synthèse d'un amide à partir d'un acide carboxylique nécessite :","option_a":"un chauffage seul","option_b":"un catalyseur acide et NH3","option_c":"un agent déshydratant et NH3","option_d":"un agent oxydant","option_e":"","option_f":"","bonne_reponse":"c","explication":"La synthèse d'un amide à partir d'un acide carboxylique (R-COOH) passe par la formation d'un intermédiaire (comme un chlorure d'acyle) avec un agent déshydratant, puis réaction avec NH3.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"c\", \"options\": {\"a\": \"un chauffage seul\", \"b\": \"un catalyseur acide et NH3\", \"c\": \"un a","_debug_options_count":4}]