Co-ordination compounds

Which of the following is expected to be paramagnetic complex?

• [Ni(H₂O)₆]²⁺

• [Ni(CO)₄]

• [Zn(NH₃)₄]²⁺

• [Co(NH₃)₆]

Which of the following has lowest  $\Delta o$   value?

• CN^-

• CO

• F^-

• NH₃

The IUPAC name of the complex [Pt(NH₃)Br(NO₂)Cl]Cl is

• Triamminechloridobromidonitrito-Nplatinum (IV) chloride

• Triamminebromidonitrito-Nchloridoplatinum (IV) chloride

• Triamminebromidochloridonitrito-Nplatinum (IV) chloride

• Triamminebromidochloridonitrito-Oplatinum (IV) chloride

What is the oxidation state of iron in K₃[Fe(CN)₆]?

• +2

• +3

• +4

• -3

Among the following the most stable complex is

• [Fe(H₂O)₆]³⁺

• [Fe(CN)₆]^3-

• [Fe(C₂O₄)₃]^3-

• [FeCl₆]3-

Which one of the following complexes is outer orbital complex?

• [Co(NH₃)₆]³⁺

• [Mn(CN)₆]^4-

• [Fe(CN)₆]^4-

• [Ni(NH₃)₆]²⁺

The number of chloride ion/ions produced by complex pentaamminechloridoplatinum (IV) chloride in an aqueous solution is

• one

• two

• three

• none

The spin only magnetic moment (in BM) of Ni²⁺ in aqueous solution would be

• 4.90

• 0

• 1.73

• 2.84

The primary and secondary valencies of chromium in the complex ion, dichloridodioxalatochromium (III), are respectively

• 3, 4

• 4, 3

• 3, 6

• 6, 3

Among the following which are ambidentate ligands?

(1) NO₂^- (2) NO₃^- (3) EDTA^4-

(4) C₂O₄^2- (5) SCN^- (6) H₂NCH₂CH₂NH₂

• (1) and (2)

• (3) and (4)

• (3) and (6)

• (1) and (5)