JEE Main 2024 Chemistry question
If an iron (III) complex with the formula [Fe(NH)(CN)] has no electron in its e orbital, then the value of x + y is
Answer: (B)
Solution
Overall charge −1 gives y = 4 for Fe³⁺; the low-spin d⁵ (t₂g⁵) octahedral complex needs six ligands, so x = 2 and x + y = 6.