Question

Atomic number of `Mn , Fe CO and Ni ` are 25,26,27 and 28 respectively . Which of the following outer orbital octahedral complexes have same number of unpaired electrons ?
`I. [MnCl_(6)]^(3-)" "II. [FeF_(6)]^(3-)`
`III. [CoF_(6)]^(3-)" " IV. [Ni(NH_(3))_(6)]^(2+)`ltbrlt choose the correct code .
A. `I and II `
B. `II and IV `
C. `I , III and IV `
D. `I and III `

Answer 1

Correct Answer - D
`[MnCl_(6)]^(3-) and [CoF_(6)]^(3-)` have same number of unpaired electrons .