Coordination chemistry - quiz

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]

Among the following ions which one has the highest paramagnetism ?

• [Cr(H₂O)₆]⁺³

• [Fe(H₂O)₆]⁺²

• [Cu(H₂O)₆]⁺²

• [Zn(H₂O)₆]⁺²

The value of 'spin only' magnetic moment for one of the following configurations is 2.84 BM. The correct one is:

• d⁴ (in strong field ligand in octahedral complexes)

• d⁴ (in weak field ligand in octahedral complexes)

• d³ (in weak as well as strong field ligand in octahedral complexes)

• d⁵ (in strong field ligand in octahedral complexes)

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

Co-ordination compounds have great importance in biological systems. In this context, which statement is incorrect ?

• Carboxypeptidase A is an enzyme and contains zinc

• Haemoglobin is the red pigment of blood and contains iron

• Cyanocobalmin is B-12 and contains cobalt

• Chlorophylls are green pigments in plants and contain calcium

The coordination compounds,[Co(NH₃)₆]³⁺, [Cr(CN)₆]^3- and [Cr(NH₃)₆]³⁺, [Co(CN)₆]^3- are examples of...

• Linkage isomerism

• Coordination isomerism

• Ionization isomerism

• Geometrical isomerism

The sum of coordination number and oxidation number of the metal M in the complex [M(en)₂ C₂O₄] Cl are

• 6

• 7

• 8

• 9

[Cu(NH₃)₄]²⁺ has the following geometry

• square planar

• tetrahedral

• octahedral

• none of these