The effective atomic number (EAN) of platinum in potassium hexach

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 Multiple Choice QuestionsMultiple Choice Questions

121.

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

  • Ma4b2

  • Ma2b2c2

  • Mabcdef

  • Ma3b3


122.

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


123.

An example for a double salt is

  • potassium ferricyanide

  • cobalt hexamine chloride

  • cuprous sulphate

  • Mohr's salt


124.

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]


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125.

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)


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126.

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


127.

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


128.

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


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129.

Which compound is zero valent metal complex?

  • [Cu(NH3)4]SO4

  • [Pt(NH3)2Cl2]

  • [Ni(CO)4]

  • K3[Fe(CN)6]


130.

The number of unidentate ligands in the complex ion is called

  • oxidation number

  • primary valency

  • coordination number

  • EAN


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