Coordination Compounds Quiz

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11 Questions

What is a central atom or ion in a coordination entity?

The atom/ion to which a fixed number of ions/groups are bound in a definite geometrical arrangement around it.

Define ligands in the context of a coordination entity.

Ligands are the neutral or negative ions bound to the central metal or ion that donate a pair/s of electrons to it.

What is the classification of ligands based on the number of donor atoms they have?

Monodentate/Unidentate, Didentate, and Polydentate ligands.

What are chelating ligands?

Chelating ligands are di- or polydentate ligands that use two or more donor atoms to bind to a single metal ion, forming ring-like complexes.

What is an ambidentate ligand?

An ambidentate ligand is a ligand that can ligate through two different donor atoms.

What are coordination compounds?

Compounds in which a central metal atom or ion is linked to a number of ions or neutral molecules by coordinate bonds.

What are Werner's main postulates regarding coordination compounds?

i) Metals exhibit primary and secondary valencies. ii) Primary valencies are ionisable and satisfied by negative ions. iii) Secondary valencies are non-ionisable and satisfied by neutral molecules or negative ions. iv) Secondary valences are fixed for a metal in a complex.

How do double salts differ from complexes?

Double salts dissociate into simple ions completely when dissolved in water, while complexes do not dissociate into individual ions.

What is a coordination entity?

The central metal ion or atom bonded to a fixed number of ions or molecules represented within a square bracket.

What is the significance of primary valencies in coordination compounds?

Primary valencies are ionisable and are satisfied by negative ions.

Explain the concept of secondary valencies in coordination compounds.

Secondary valencies are non-ionisable and are satisfied by neutral molecules or negative ions.

Test your knowledge on coordination compounds, which are compounds where a central metal atom is linked to ions or molecules by coordinate bonds. Explore examples like K4[Fe(CN)6] and understand the postulates of Werner's theory. Challenge yourself with questions on primary and secondary valencies, ionization, and complex ions.

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