Multiple Choice QuestionsWhich 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
D.
86
EAN (effective atormc number)
= [Z- oxidaton number] + [2 x number of ligands]
For Pt (platinum) Z = 78
Oxidation number = 4
EAN=(78-4)+ (2 x6)
= 74 + 12 = 86 (Atomic number Rn)
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
The number of unidentate ligands in the complex ion is called
oxidation number
primary valency
coordination number
EAN
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