Which of the following ligands has the highest field strength?

Carbon donor ligands are strong ligands and usually form low spin complexes. Among the complexes given below,select the high spin complex.

The color of $[Ti(H_2O)_6]^{3+}$ is due to:

Simplified absorption spectra of three complexes $(i), (ii)$ and $(iii)$ of $M^{n+}$ ion are provided below; their $\lambda_{max}$ values are marked as $A, B$ and $C$ respectively. The correct match between the complexes and their $\lambda_{max}$ values is
$(i)$ $[M(NCS)_6]^{(-6+n)}$
$(ii)$ $[MF_6]^{(-6+n)}$
$(iii)$ $[M(NH_3)_6]^{n+}$

Which of the following complex ions absorbs the light of minimum wavelength?

$[Fe(CN)_{6}]^{4-}$ and $[Fe(H_{2}O)_{6}]^{2+}$ are of different colours in dilute solutions. Why?