{"@context":"https://schema.org/","@type":"Quiz","dateCreated":"2026-07-03T07:17:40.820Z","dateModified":"2026-07-03T07:17:40.820Z","typicalAgeRange":"11-18","educationalLevel":"CPET","assesses":"Chemistry - coordination compounds","educationalAlignment":[{"@type":"AlignmentObject","alignmentType":"educationalTopic","targetName":"coordination compounds"},{"@type":"AlignmentObject","alignmentType":"educationalSubject","targetName":"Chemistry"},{"@type":"AlignmentObject","alignmentType":"educationalExam","targetName":"CPET"}],"name":"Quiz about coordination compounds","about":{"@type":"Thing","name":"Chemistry - coordination compounds"},"hasPart":[{"@type":"Question","eduQuestionType":"Multiple choice","learningResourceType":"Practice problem","educationalLevel":"intermediate","name":"Question About coordination compounds","text":"Coordination number of Cerium in ceric ammonium nitrate, $$(NH_4)_2[Ce(NO_3)_6]$$, is:}","encodingFormat":"text/markdown","comment":{"@type":"Comment","text":"Count six nitrate ligands, each binding through two oxygen atoms."},"suggestedAnswer":[{"@type":"Answer","position":0,"encodingFormat":"text/markdown","text":"

","comment":{"@type":"Comment","text":"\"\""}},{"@type":"Answer","position":1,"encodingFormat":"text/markdown","text":"

","comment":{"@type":"Comment","text":"\"\""}},{"@type":"Answer","position":2,"encodingFormat":"text/markdown","text":"

","comment":{"@type":"Comment","text":"\"\""}},{"@type":"Answer","position":3,"encodingFormat":"text/markdown","text":"

","comment":{"@type":"Comment","text":"\"\""}}],"acceptedAnswer":{"@type":"Answer","position":3,"encodingFormat":"text/markdown","text":"

","comment":{"@type":"Comment","text":"Count six nitrate ligands, each binding through two oxygen atoms."},"answerExplanation":{"@type":"comment","text":"Ce4+ with 2 NH4+ counterions needs complex charge -2. 6 NO3- (-6 total) + Ce4+ = -2, confirms 6 nitrates. Bidentate binding gives CN=12.\\[\\boxed{12}\\]"}}}]}

Coordination number of Cerium in ceric ammonium nitrate, \((NH_4)_2[Ce(NO_3)_6]\), is:

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The Correct Option is D

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