Question

Which of the following complex has zero magnetic moment (spin only)?

• A. \( [Ni(NH₃)_6]Cl_2 \)
• B. Na₃[FeF₆]
• C. \( [Cr(H₂O)_6]SO₄ \)
• D. \( [Fe(NH₃)_6]Cl_3 \)

Hint:

A zero magnetic moment complex usually occurs when the metal ion is in a low-spin state, resulting in paired electrons.

Answer 1

The Correct Option is D

Step 1: Identifying zero magnetic moment.
Zero magnetic moment occurs when the metal center in the complex has no unpaired electrons. This can happen when the metal is in a low-spin configuration with all electrons paired.

Step 2: Conclusion.
Thus, the correct answer is option (D).

Final Answer: \[ \boxed{\text{(D) } [Fe(NH₃)_6]Cl_3} \]