In Wilkinson's catalyst,the hybridization of the central metal ion and its shape are respectively:

What is the geometry of the $[Ni(CO)_4]$ complex?

Which of the following matches is incorrect?
Complex compounds $-$ Type of hybridization

Consider the transition metal ions $Mn^{3+}$, $Cr^{3+}$, $Fe^{3+}$, and $Co^{3+}$. All form low spin octahedral complexes. The correct decreasing order of unpaired electrons in their respective $d$-orbitals of the complexes is:

The hexafluoroferrate $(II)$ ion is an outer orbital complex. The number of unpaired electrons in it is .............

Which of the following complex ions does not contain any $d$-electrons in the central metal atom?