Coordination Compounds

The number of Cl=O bonds in perchloric acid is, " "

The major products of the following reaction are:

Consider the following reactions:
'A' (C₇H₁₄) --(ozonolysis)--> 'B' + 'C'
'B' --(I₂ + NaOH)--> yellow ppt
'C' --(I₂ + NaOH)--> no yellow ppt
'C' --(Ag₂O/Δ)--> silver mirror
'C' --(LiAlH₄)--> 'D' --(Anhydrous ZnCl₂ & Conc. HCl)--> gives white turbidity within 5 minutes
'A' is:

Considering that ∆₀ > P, the magnetic moment (in BM) of [Ru(H₂O)₆]²⁺ would be

Consider the complex ions, trans-[Co(en)?Cl?]? (A) and cis-[Co(en)?Cl?]? (B). The correct statement regarding them is:

The number of possible optical isomers for the complexes ${\mathrm{M}\mathrm{A}}_2{\mathrm{B}}_2$ with ${\mathrm{s}\mathrm{p}}^3$ and $\mathrm{d}\mathrm{s}\mathrm{p}{\mathrm{p}}^2$  hybridized metal atom, respectively is:

[Note: A and B are unidentate neutral and unidentate monoanionnic ligands, respectively]

The IUPAC name of the complex is $\left[\mathrm{P}\mathrm{t}{\left({\mathrm{N}\mathrm{H}}_3\right)}_2\mathrm{C}\mathrm{l}\left({\mathrm{N}\mathrm{H}}_2{\mathrm{C}\mathrm{H}}_3\right)\right]\mathrm{C}\mathrm{l}$ $\left[{\left({}_{}\right)}_{}\left({}_{}{}_{}\right)\right]$ is

The theory that can completely/properly explain the nature of bonding in $\left[\mathrm{N}\mathrm{i}(\mathrm{C}\mathrm{O}{)}_4\right]$ $\left[{}_{}\right]$ is