The complex which is following the EAN Rule is
(A) `[Ca(EDTA)]^(2-)`
(B) `[Cr(en)_(3)]^(3+)]`
(C) `[CoBrCl( trien )]^(+)]`
(D) `[Ni(dmg)_(2)]`

Find the sum of number of geometrical isomers for following complexes. (a) [CoCl_(2)Br_(2)]^(2-) " " (b) [Rh(en)_(3)]^(3+) " " ( c) [Cr(en)_(2)Br_(2)]^(+) (d)[Pt en Cl_(2)] "

Same number of unpaired electron is observed in which of the following complexes (a) [MnCl_(6)]^(3-) (b) [Fe(CN)_(6)]^(3-) ( c) [CoF_(6)]^(3-) (d) [Ni(NH_(3))_(6)]^(2+)

What is the coordination number and the oxidation state of the metal in each of the following complexes ? (a) [AgCl_(2)]^(-)," " (b) [Cr(H_(2)O)_(5)Cl]^(2+)," " ( c) [Co(NCS)_(4)]^(2-) (d) [Co(NH_(3))_(3)(NO_(2))_(3)]," ": (e ) [Fe(EDTA)]^(-)," " (f) [Cu(en)_(2)]SO_(4) (g) K[Pt(NH_(3))Cl_(5)]

Calculate the effective atomic number of the metal atoms in the following complexes / complex ions. (A) [Cr(CO)_(6)]" "(b)[Fe(CN)_(6)]^(3-) " " (c )[Co(CN)_(6)]^(4-)" " [Ni(NH_(3))_(6)]^(2+) [Cr=24,Fe=26,Co=27 and Ni=28 as atomic numbers]

Which of the following coordination compounds exhibits ionisation isomerism (a) [Cr(NH_(3))_(6)]CI_(3) (b) [Cr(en)_(3)CI_(3)] (c ) [Cr(en)_(3)]CI_(3) (d) [Co(NH_(3))_(5)Br]SO_(4) .

The water -soluble complex among the following is (a) [Ni(HDMG)_(2)] (b) [Co(NH_(3))_(3)CI_(3)] (c ) Ni(CO)_(4) [Ni(HDMG)_(2)]CI_(2) .

How many of the given complexes follow E.A.N rule ? (a) [Fe(CO)_(5)] (b) [Co_(2)(CO)_(8)] ( c) [Fe(C_(5)H_(5))_(2)] (d) K_(3)[Fe(CN)_(6)] ( e) [Fe(NO)_(2)(CO)_(2)] (f) [CoF_(6)]^(4-)

How many complexes among the following are paramagnetic [Mn(CN)_(6)]^(3-)[Cr(H_(2)O)_(6)]^(3+)[Co(en)_(3)]^(3+) [V(CO)_(6)],[Ni(NH_(3))_(6)]^(2+)[Ni(dmg)_(3)] [Pt(Cl)_(2)(NH_(3))_(2)][Cu(NH_(3))_(4)]^(2+)[Cu(CN)_(4)]^(3-)

Calculate the EAN of central atom in the following complexes (a) [Cr(CO)_(6)]" "(b) [Fe(CN)_(6)]^(4-)" " (c ) [Fe(CO)_(5)] " " (d) [Co(NH_(3))_(6)]^(3+) (e ) [Ni(CO)_(4) " " (f) [Cu(CN)_(4)]^(3-)" "(g)[Pd(NH_(3))_(6)]^(4+)" " (h) [PtCl_(6)]^(2-)

Calculate EAN in [Cr(CN)_(6)]^(3-) (b) [PdXCI_(4)]^(2-) (c ) [Pt(NH_(3))_(4)]^(2+) (d) [Cu(CN)_(4)]^(3-) .