{"@context":"https://schema.org/","@type":"Quiz","dateCreated":"2026-07-03T07:17:40.819Z","dateModified":"2026-07-03T07:17:40.819Z","typicalAgeRange":"11-18","educationalLevel":"CPET","assesses":"Chemistry - d and f Block Elements","educationalAlignment":[{"@type":"AlignmentObject","alignmentType":"educationalTopic","targetName":"d and f Block Elements"},{"@type":"AlignmentObject","alignmentType":"educationalSubject","targetName":"Chemistry"},{"@type":"AlignmentObject","alignmentType":"educationalExam","targetName":"CPET"}],"name":"Quiz about d and f Block Elements","about":{"@type":"Thing","name":"Chemistry - d and f Block Elements"},"hasPart":[{"@type":"Question","eduQuestionType":"Multiple choice","learningResourceType":"Practice problem","educationalLevel":"intermediate","name":"Question About d and f Block Elements","text":"Which of the following vanadium pentahalides exists?}","encodingFormat":"text/markdown","comment":{"@type":"Comment","text":"Only fluoride is small and resistant enough to redox to form a stable pentahalide with V(V)."},"suggestedAnswer":[{"@type":"Answer","position":0,"encodingFormat":"text/markdown","text":"

VF5

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

VCl5

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

VBr5

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

VI5

","comment":{"@type":"Comment","text":"\"\""}}],"acceptedAnswer":{"@type":"Answer","position":0,"encodingFormat":"text/markdown","text":"

VF5

","comment":{"@type":"Comment","text":"Only fluoride is small and resistant enough to redox to form a stable pentahalide with V(V)."},"answerExplanation":{"@type":"comment","text":"Small V5+ (0.54 A) can only pack 5 small F- ions around it without steric strain; larger halides can't pack and also get oxidized.\\[\\boxed{VF_5}\\]"}}}]}

Which of the following vanadium pentahalides exists?

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The Correct Option is A

Solution and Explanation

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