The total number of structural isomers possible for ${\mathrm{C}}_3{\mathrm{H}}_6$ are

${\mathrm{Na}}_2\mathrm{S}+{\mathrm{Na}}_2\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_5\mathrm{NO}\right]⟶{\mathrm{Na}}_4\left[\mathrm{Fe}{\left(\mathrm{CN}\right)}_5\mathrm{NOS}\right]$

Oxidation number of $\mathrm{Fe}$ in the reactant (complex) and the product (complex) are :

Consider the following statements:

According to Werner's theory:

(1) Ligands are connected to the metal ions by ionic bonds.

(2) Secondary valencies have directional properties

(3) Secondary valencies are non-ionisable

Of these statements:

Which of the following is correct for both the following coordination compounds?

$\left(\mathrm{I}\right) {\mathrm{CoCl}}_3·6{\mathrm{NH}}_3$ and

$\left(\mathrm{II}\right) {\mathrm{PtCl}}_4·5{\mathrm{NH}}_3$