The two compounds $[Co(SO_4)(NH_3)_5]Br$ and $[Co(SO_4)(NH_3)_5]Cl$ represent:

Draw the structures of the geometrical isomers of $[Fe(NH_3)_2(CN)_4]^-$.

Total number of cis $N-Mn-Cl$ bond angles (that is,$Mn-N$ and $Mn-Cl$ bonds in cis positions) present in $cis-[Mn(en)_2Cl_2]$ is: $(en = NH_2CH_2CH_2NH_2)$

$(a) \ CoCl_{3} \cdot 4 NH_{3}$
$(b) \ CoCl_{3} \cdot 5 NH_{3}$
$(c) \ CoCl_{3} \cdot 6 NH_{3}$
$(d) \ CoCl(NO_{3})_{2} \cdot 5 NH_{3}$
Number of complex(es) which will exist in $cis-trans$ isomerism is/are ....

What is the magnetic moment of a divalent ion in aqueous solution if its atomic number is $28$ (in $BM$)?

If the bidentate ligand ethane-$1, 2$-diamine $(en)$ is progressively added to a green aqueous solution of $[Ni(H_2O)_6]Cl_2$ in the molar ratios $en : Ni$ as $1 : 1, 2 : 1, 3 : 1$,then their associated spin-only magnetic moments (in $B.M.$ unit) are respectively