Quiz — 67c1c9630b032_Test d_identification des ions - Corrigé.pdf

Question 1 sur 10 20:00

[{"id":11373,"question":"Quel test permet d'identifier la présence d'ions fer(III) en solution ?","option_a":"A. Formation d'un précipité blanc avec NaOH","option_b":"B. Formation d'un précipité rouille avec NaOH","option_c":"C. Formation d'un précipité bleu avec NaOH","option_d":"D. Formation d'un précipité vert avec NaOH","option_e":"","option_f":"","bonne_reponse":"b","explication":"Les ions fer(III) (Fe³⁺) réagissent avec l'hydroxyde de sodium (NaOH) pour former un précipité rouille caractéristique.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"A. Formation d'un précipité blanc avec NaOH\", \"b\": \"B. Formatio","_debug_options_count":4},{"id":11374,"question":"La réaction entre les ions cuivre(II) et l'hydroxyde de sodium produit un précipité bleu.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Cette affirmation est vraie : Cu²⁺ + 2OH⁻ → Cu(OH)₂ (précipité bleu).","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":11375,"question":"Quel ion donne une coloration jaune lors du test de flamme ?","option_a":"A. Sodium (Na⁺)","option_b":"B. Potassium (K⁺)","option_c":"C. Calcium (Ca²⁺)","option_d":"D. Baryum (Ba²⁺)","option_e":"","option_f":"","bonne_reponse":"a","explication":"Le sodium (Na⁺) donne une flamme jaune caractéristique lors du test de flamme.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"a\", \"options\": {\"a\": \"A. Sodium (Na⁺)\", \"b\": \"B. Potassium (K⁺)\", \"c\": \"C. Calcium ","_debug_options_count":4},{"id":11376,"question":"Les ions chlorure (Cl⁻) peuvent être identifiés par ajout de nitrate d'argent (AgNO₃).","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai : Cl⁻ + Ag⁺ → AgCl (précipité blanc qui noircit à la lumière).","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":11377,"question":"Quel précipité se forme lors de l'ajout d'hydroxyde de sodium à une solution contenant des ions zinc(II) ?","option_a":"A. Précipité vert","option_b":"B. Précipité blanc soluble dans l'excès de NaOH","option_c":"C. Précipité bleu","option_d":"D. Précipité rouille","option_e":"","option_f":"","bonne_reponse":"b","explication":"Les ions zinc(II) forment un précipité blanc (Zn(OH)₂) soluble dans l'excès d'hydroxyde de sodium.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"A. Précipité vert\", \"b\": \"B. Précipité blanc soluble dans l'e","_debug_options_count":4},{"id":11378,"question":"Les ions carbonate (CO₃²⁻) réagissent avec l'acide chlorhydrique pour libérer un gaz incolore.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai : CO₃²⁻ + 2H⁺ → CO₂ (gaz) + H₂O.","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":11379,"question":"Quel test permet de distinguer les ions fer(II) des ions fer(III) ?","option_a":"A. Test de flamme","option_b":"B. Ajout d'hydroxyde de sodium","option_c":"C. Ajout de nitrate d'argent","option_d":"D. Test au papier pH","option_e":"","option_f":"","bonne_reponse":"b","explication":"L'ajout d'hydroxyde de sodium permet de distinguer Fe²⁺ (précipité vert) de Fe³⁺ (précipité rouille).","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"A. Test de flamme\", \"b\": \"B. Ajout d'hydroxyde de sodium\", \"c\": \"","_debug_options_count":4},{"id":11380,"question":"Les ions sulfate (SO₄²⁻) forment un précipité blanc avec le chlorure de baryum.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai : SO₄²⁻ + Ba²⁺ → BaSO₄ (précipité blanc).","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":11381,"question":"Quel ion donne une flamme violette lors du test de flamme ?","option_a":"A. Sodium (Na⁺)","option_b":"B. Potassium (K⁺)","option_c":"C. Calcium (Ca²⁺)","option_d":"D. Lithium (Li⁺)","option_e":"","option_f":"","bonne_reponse":"b","explication":"Le potassium (K⁺) donne une flamme violette caractéristique lors du test de flamme.","points":1,"type":"qcm","actif":1,"section_id":null,"ordre":0,"_debug_answer_data_type":"string","_debug_answer_data_preview":"{\"correct\": \"b\", \"options\": {\"a\": \"A. Sodium (Na⁺)\", \"b\": \"B. Potassium (K⁺)\", \"c\": \"C. Calcium ","_debug_options_count":4},{"id":11382,"question":"L'ajout d'hydroxyde de sodium à une solution contenant des ions aluminium(III) forme un précipité blanc qui se dissout dans l'excès de NaOH.","option_a":"Vrai","option_b":"Faux","option_c":"","option_d":"","option_e":"","option_f":"","bonne_reponse":"a","explication":"Vrai : Al³⁺ + 3OH⁻ → Al(OH)₃ (précipité blanc soluble dans l'excès de NaOH).","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}]