Coordination Chemistry

In which of the following compounds an atom contributes both the electrons to form a bond?

• Covalent compound

• Ionic compounds

• Co-ordination compounds

• Organic compounds

Co-ordination number can be defined as

• Ring forming ligands

• Number of monodentate ligands linked to central atom

• Ligands capable of accepting π-e- density

• Ligand & central metal ion kept in square bracket

The spatial arrangement of ligands around the central metal ion is known as

• coordination sphere

• coordination polyhedron

• oxidation number

• coordination number

Which of the following rules of writing chemical formula of co ordination compounds is wrong?

• Formula of the cation must be written first followed by anion

• In the chemical formula the central metal is written before the ligands

• Prefixes like di-, tri-, tetra-, etc. are used

• The Co-ordination sphere is written in small brackets

Complexes having bidentate ligands are known as

• co-ordination sphere

• chelates

• central metal atom or ion

• complex ion

Which theory is considered as the first theory, regarding the bonding in Co-ordination Compounds?

• Crystal Field Theory

• Werner's theory

• MO theory

• VB theory

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

The unpaired electrons in Ni(CO)4 are

• 0

• 1

• 3

• 4

Select the correct IUPAC name for: [Co(NH₃)₆]²⁺

• hexammoniacobaltate(II) ion

• hexaamminecobaltate(II) ion

• hexammoniacobalt(II) ion

• hexaamminecobalt(II) ion

K4[Fe(CN)6 ] is a :

• double salt

• complex compound

• acid

• base