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The magnetic moment of the complex anion [ Cr ( NO ) ( NH ₃ )( CN )₄ ]²⁻ is :

Options

  1. A5.91 BM
  2. B3.87 BM
  3. C1.73 BM
  4. D2.82 BM

Correct answer

D. 2.82 BM

Step-by-step solution

In [ Cr ( NO ) ( NH ₃ )( CN )₄ ]²⁻ , Cr ²⁺ ( d ^4 ) is given as : i.e., 2 unpaired electrons = 2(2+2) = 8 =2.82

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