Question
Question: The pair in which both species have same magnetic moment is –...
The pair in which both species have same magnetic moment is –
A
[Cr(H2O)6]2+ , [CoCl4]2–
B
[Cr(H2O)6]2+ , [Fe(H2O)6]2+
C
[Mn(H2O)6]2+ , [Cr(H2O)6]2+
D
[CoCl4]2– , [Fe(H2O)6]2+
Answer
Cr(H<sub>2</sub>O)<sub>6</sub>2+ , Fe(H<sub>2</sub>O)<sub>6</sub>2+
Explanation
Solution
[Cr(H2O)6]2+ have Cr2+
Cr2+ = 3d4 4s0 (four unpaired electrons)
Fe2+ = 3d6 4s0 (in presence of weak ligand also have four unpaired electrons)