121.

Which of the following complex compounds gives 5 isomers? (M = metal ; a,b,c,d,e, f = ligands)

• Ma₄b₂

• Ma₂b₂c₂

• Mabcdef

• Ma₃b₃

Identify the pair of complex showing geometrical isomerism and diamagnetic.

1.[PdCl₂(PPh₃)₂]:[Pt(NH₃)₂ClBr]

2.[PdCl₂(PPh₃)₂]:[NiCl₂(PPh₃)₂]

3.[Pt(PEt3)Cl2]2:[Co(en)3]Br₃

• 1

• 1, 2 and 3

• 2 and 3

• 3 and 4

An example for a double salt is

• potassium ferricyanide

• cobalt hexamine chloride

• cuprous sulphate

• Mohr's salt

Which one of the following platinum complexes is used as anticancer drug?

• [Pt(NH₃)₄]²⁺

• [PtCl₆]^2-

• cis-[PtCl₂(NH₃)₂]

• trans-[PtCl₂(NH₃)₂]

The effective atomic number (EAN) of platinum in potassium hexachloro-platinate(IV) is

• 78

• 74

• 84

• 86

Pick out the complex compound in which the central metal atom obeys EAN rule strictly

• K₄[Fe(CN)₆]

• K₃[Fe(CN)₆]

• [Cr(H₂O)₆]Cl₃

• [Cu(NH₃)₄]SO₄

The ratio of cationic radius to anionic radius in an ionic crystal is greater than 0.732. Its coordination number is

• 6

• 8

• 1

• 4

Which one of the following statements is incorrect?

• In K₃[Fe(CN)₆] the ligand has satisfied only the secondary valency of ferric ion

• In  K₃[Fe(CN)₆],the ligand has satisfied both primary and secondary valancies of ferric ion

• In K₃[Fe(CN)₆], the ligand has satisfied both primary and secondary valancies of ferrous ion

• In [Cu(NH₃)₄]SO₄ the ligand has satisfied only the secondary valency of copper

Which compound is zero valent metal complex?

• [Cu(NH₃)₄]SO₄

• [Pt(NH₃)₂Cl₂]

• [Ni(CO)₄]

• K₃[Fe(CN)₆]

The number of unidentate ligands in the complex ion is called

• oxidation number

• primary valency

• coordination number

• EAN