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JIPMER2017ChemistryCoordination Compounds

Which of the following is not expected to show paramagnetism?

Options

  1. A[ Ni ( H ₂ O ) ]²⁺
  2. BNi ( CO )₄
  3. C[ Ni ( NH ₃ )₄ ]²⁺
  4. D[ Co ( NH ₃ )₆ ]²⁺

Correct answer

B. Ni ( CO )₄

Step-by-step solution

Ni ( CO )₄ due to absence of unpaired electrons does not show paramagnetic. Ni [ Ar ]₁₈ 3 d^8 4 s^2

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