Coordination chemistry

Coordination compounds play a vital role in

• biological functions

• catalytic applications

• both a and b

• none of these

The central metal ion of K₄[Fe(CN)₆]

• Fe⁺

• Fe²⁺

• Fe3⁺

• Fe4⁺

The coordination entity of K₂[NiCl₄]

• NiCl₄

• K₂[NiCl₄

• [NiCl₄]^2-

• Ni²⁺

In the complex [Co(NH₃)₅Cl]Cl, the coordination number is

• 3

• 5

• 6

• 4

Which one is a cationic complex?

• K₃[Fe(CN)₆]

• Na₂[Ni(EDTA)]

• [Co(en)₂Cl₂]Cl

• K₃[Fe(CN)₅NO]

What type of bond forms when metal ions bonding to ligands with 2 electrons?

• covalent bond

• Ionic bond

• coordinate covalent bond

What is meant by the term “complex ion”? Which statement best explains this;

• A anion

• A cation

• A central metal ion surrounded by Ligands

• A ion with 4 electrons

What is the correct formula for the complex ion: Tetraaquadichloridochromium(III) chloride?

• [Cr(H₂O)₄Cl₂]Cl

• [Cr(H₂O)₃Cl₃]Cl

What is the maximum oxidation state expected for vanadium?

• +4

• +5

• +6

• +8

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