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The classical definition of oxidation looked at oxygen and:
ASulphur
BHydrogen
CCarbon
DNitrogen
Answer & Solution
Correct answer: B. Hydrogen
1. Two elements featured in the early definitions.
2. Adding one or removing the other counted as oxidation.
3. They were oxygen and hydrogen.
_Source: NCERT Class 11 Chemistry Part II, Unit 8, Redox Reactions._
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