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Redox reactions are involved in phenomena that are physical and also:
AHistorical
BPolitical
CBiological
DAstronomical
Answer & Solution
Correct answer: C. Biological
1. Redox chemistry reaches beyond the laboratory.
2. Living processes depend on it too.
3. So the phenomena are both physical and biological.
_Source: NCERT Class 11 Chemistry Part II, Unit 8, Redox Reactions._
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