$[Ti(H_2O)_6]^{3+}$ is paramagnetic in nature due to

Complex $X$ of composition $Cr(H_{2}O)_{6}Cl_{n}$ has a spin-only magnetic moment of $3.83 \ BM$. It reacts with $AgNO_{3}$ and shows geometrical isomerism. The $IUPAC$ nomenclature of $X$ is

Which of the following complexes exhibits optical isomerism?

Among the following,the coloured compound is:

Of the following configurations,the optical isomers are

The pair of metal ions that can give a spin-only magnetic moment of $3.9 \, BM$ for the complex $[M(H_2O)_6]Cl_2$ is