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ChemistryNEET 2025Oxidation number and balancing redox equations

Redox Reactions

Consider the following compounds: , and . The oxidation states of the underlined elements (O in , O in , S in ) in them are, respectively:

  1. A.+1, –1 and +6✓
  2. B.+2, –2 and +6
  3. C.+1, –2 and +4
  4. D.+4, –4 and +6

Solution

In the superoxide ion gives oxygen each, i.e. K is (the element asked); in oxygen is ; in sulphur is . Matching the underlined elements gives .

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