COORDINATION CHEMISTRY

The ligand N(CH₂CH₂NH₂)3 is

• tridentate

• pentadentate

• tetradentate

• hexadentate

Which of the following facts about the complex [Cr(NH₃)₆]Cl₃ is wrong?

• The complex is paramagnetic

• The complex is an outer orbital complex

• The complex gives white precipitate with

  silver nitrate solution

• The complex involves d²sp³ hybridization and is octahedral in shape.

Which of the following shall form an octahedral complex?

• d4 (low spin)

• d8(high spin)

• d6 (low spin)

• all of these.

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

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

• None of them

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

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⁺