s-Block Elements

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Multiple Choice

Oxidation state of the central atom in A and B are _______ and _______ respectively.

 A + H2O → C + H2O2 + O2
 B + H2O → C
 2B → D + 2K (At 670K)
 K is pottasium

  1. + 1, + 4
  2. + 4, + 1
  3. + 1, + 1
  4. + 4, + 4
  5. None of these
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