According to crystal field theory, the M-L bond in a complex is

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151.

[EDTA]4- is a 

  • monodentate ligand

  • bidentate ligand

  • quadridentate ligand

  • hexadentate ligand


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152.

According to crystal field theory, the M-L bond in a complex is

  • partially covalent

  • purely ionic

  • purely covalent

  • purely coordinate


B.

purely ionic

According to crystal field theory considers the bond between metal ion and ligand as "purely electrostatic" i e this theory assumes that metal ion and ligands act as point charges and hence interaction between them is purely electrostatic or purely ionic in nature.


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153.

Copper sulphate solution, when added to an excess of ammonium hydroxide, forms a complex compound due to :

  • [Cu(NH3)2]2+

  • [Cu(NH3)4]2+

  • [Cu(NH3)6]2+

  • Cu2+


154.

Mohr salt is made up of which combination of salt?

  • Ammonium sulphate and potash

  • Ammonium sulphate and ferrous sulphate

  • Ammonium sulphate and copper sulphate

  • Ammonium sulphate and magnesium sulphate


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155.

The coordination number and the oxidation state of the element 'M' in the complex [M(en)2(C2O4)] NO2 {where (en) is ethan 1, 2-diamine} are respectively

  • 6 and 3

  • 4 and 3

  • 6 and 2

  • 4 and 2


156.

In CsCl type structure the co-ordination of Cs+ and Cl- are:

  • 6, 6

  • 6, 8

  • 8, 8

  • 8, 6


157.

The IUPAC name of K2[PtCl6] is:

  • hexachloroplatinate potassium

  • potassium hexachloroplatinate (IV)

  • potassium hexachloroplatinate

  • potassium hexachloroplatinum (IV)


158.

Calomel (Hg2Cl2) on reaction with ammonium hydroxide gives

  • HgO

  • Hg2O

  • NH2-Hg-Hg-Cl

  • HgNH2Cl


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159.

The isomersim exhibited by following compounds [Co(NH3)6][Cr(CN)6] and [Cr(NH3)6(CN)6] is

  • ionisation isomerism

  • polymerisation isomersion

  • Linkage isomersim

  • Cooridination isomerism


160.

The increasing order of field strenght of ligands is

  • NH3< H2O< Cl-< CO< CN-

  • Cl-< H2O< NH3 < CN-< CO

  • Cl-< CO< CN-< H2O < NH3

  • CN-< CO< NH3< Cl- < H2O


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