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Question

The non-stoichiometric compound Fe0.94O is formed when x% of Fe2+ ions are replaced by Fe3+ ions then x is


  1. 6

  2. 18

  3. 15

  4. 12


Solution

The correct option is B

18


Number of Fe3+ ions replacing xFe2+=2x3; Vacancies of cations

=x2x3=x3
But x3=10.94=0.06 or x = 0.06*3 = 0.18 = 18%

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