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In disproportionation, the element in the reacting substance is in a state that is:

AUndefined
BIntermediate
CThe highest
DThe lowest
Answer & Solution
Correct answer: B. Intermediate
1. The element needs room to move in both directions. 2. It cannot be at either end of its range. 3. So it starts in the intermediate oxidation state. _Source: syllabus Chemistry Part II, Unit 8, Redox Reactions._
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