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Burning sulphur in oxygen counts as oxidation because oxygen is:

AFrozen
BMelted
CAdded
DRemoved
Answer & Solution
Correct answer: C. Added
1. Sulphur combines with dioxygen to form sulphur dioxide. 2. The classical test is whether oxygen joins the element. 3. Here oxygen is added, so sulphur is oxidised. _Source: syllabus Chemistry Part II, Unit 8, Redox Reactions._
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