(a) Using valence bond theory, predict the hybridization and magnetic character of the complex: [ Ni ( CO )_4] (Atomic number: Ni =28 ) (b) Write…

Using valence bond theory, predict the hybridization and magnetic character of the complex :

$\displaystyle \left[\mathrm{Ni}(\mathrm{CO})_{4}\right]$ (Atomic number : $\displaystyle \mathrm{Ni}=28$ )

Write IUPAC name of $\displaystyle \left[\mathrm{Pt}\left(\mathrm{NH}_{3}\right)_{2} \mathrm{Cl}\left(\mathrm{NO}_{2}\right)\right]$.

Why $\displaystyle \left[\mathrm{Co}(\mathrm{en})_{3}\right]^{3+}$ is a more stable complex than $\displaystyle \left[\mathrm{Co}\left(\mathrm{NH}_{3}\right)_{6}\right]^{3+} ? \quad$