coordination compounds

1. The donor sites of (EDTA)^4- are ?

• O atoms only

• N atoms only

• Two N and four O atoms

• Three N and three O atoms

The compound having lowest oxdation state of iron is

• K₄[Fe(CN)₆]

• K₂FeO₄

• [Fe(CO)₅]

• K₃[Fe(CN)₆]

The IUPAC name of the compound [Cu (NH₃)₄](NO₃)₂ is :

• Cuprammonium nitrate

• Tetraammine copper (II) dinitrate

• Tetraammine copper (II) nitrate

• Tetraammine copper (III) dinitrate

EAN (Effective Atomic Number) of a metal carbonyl M(CO)_x is 36. If atomic number of metal M is 26, what is the value of x ?

• 4

• 8

• 5

• 6

In the complex [E(en)2(C2O4)]NO2 (where (en) is ethylenediamine) _______are the coordination number and the oxidation state of the element ‘E’ respectively.

• 6 and 2

• 2 and 2

• 4 and 3

• 6 and 3

A complex compound in which the oxidation number of a metal is zero is

• K4 [Fe (CN)6]

• K3 [Fe (CN)6]

• [Ni (CO)4]

• [Pl (NH3 )4]Cl2

Which of the following species is not expected to be a ligand

• NO

• NH₄⁺

• NH₂CH₂CH₂NH₂

• CO

Which one is a cationic complex?

• K₃[Fe(CN)₆]

• Na₂[Ni(EDTA)]

• [Co(en)₂Cl₂]Cl

• K₃[Fe(CN)₅NO]

Complexes having bidentate ligands are known as

• co-ordination sphere

• chelates

• central metal atom or ion

• complex ion

According to the postulates of Werner for coordination

compounds

• secondary valency is ionizable

• primary valency is ionizable

• primary and secondary valencies are non-ionizable

• only primary valency is non-ionizable