TRANSITION ELEMENTS AND LIGANDS A2 CHEMISTRY 9701

Transition element is a element from ___ block in periodic table that forms one or more stable ions with incomplete ___ orbitals. Fill in the blank.

• s

• p

• d

• f

Scandium forms 3+ ion only and the ion's electronic configuration is [Ar] 4s⁰ 3d⁰ . Is Scandium a transition element?

• Yes

• No

Which of the following is not the property of transition elements?

• have variable oxidation states

• can behave as catalyst

• very poor conductors of heat and electricity

• they form coloured complex compounds

What is the co-ordination number for the compound above?

• 4

• 5

• 6

• 8

What type of ligand is CN^- ?

• monodentate

• bidentate

• polydentate

• tetradentate

Which of the following is an example of polydentate ligand?

• water

• ammonia

• EDTA^4-

• ethanedioate ion

In octahedral complexes, the 3d_xy and 3d_z2 are having more repulsion and will be splitting into non-degenerate orbitals at ______ energy level

• higher

• lower

In tetrahedral complexes, the 3d_xy and 3d_z2 are having less repulsion and will be splitting into non-degenerate orbitals at ______ energy level

• higher

• lower