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The calculated spin - only magnetic moments of K 3 [Fe(OH) 6 ] and K 4 [Fe(OH) 6 ] respectively are :

  1. 4.90 and 4.90 B.M.
  2. 5.92 and 4.90 B.M.
  3. 3.87 and 4.90 B.M.
  4. 4.90 and 5.92 B.M.

Correct answer: 5.92 and 4.90 B.M.

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