The crystal field splitting for Cr3+ ion in an octahedral field i

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241.

What are the spin only magnetic moments (in BM) for Ni (II) ion in square planar arid octahedral geometry, respectively?

  • 0 and 2.83

  • 2.83 and 2.83

  • O and 1.73

  • O and O


242.

Which one of the following is used for the estimation of hardness of water:

  • E.D.T.A

  • Dimethyl glyoxime

  • Ethylene diamine

  • Triphenyl phosphine


243.

The coordination number of Fe[Fe(CN)6]4- , [Fe(CN)6]3- and [FeCl4]- respectively:

  • 6 , 3 , 3

  • 6 , 4 , 6

  • 6 , 6 , 4

  • 2 , 3 , 3


244.

Intramolecular hydrogen bonding is present is:

  • nickel dimethyl glyoximate

  • anti-pyridine-2-carboxaldoxime

  • maleic acid monoanion

  • All of the above


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245.

The total number of possible isomers of the complex compound [CuII(NH3)4][PtIICl4] is:

  • 3

  • 6

  • 5

  • 4


246.

The solution of the complex [Cu(NH3)4]SO4 in water:

  • will give the test of Cu2+ ions

  • will give the test of NH3

  • will give the test of SO42- ions

  • will not give the tests of any of the above species


247.

In the complex [Co(en)2Cl2 ] Br, the co-ordination number and oxidation state of cobalt are

  • 6 and +1

  • 6 and +3

  • 3 and +3

  • 4 and +2


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248.

The crystal field splitting for Cr3+ ion in an octahedral field increases for ligands I- , H2O , NH3 , CN- and the order is :

  • I- < H2O < NH3 < CN-

  • CN- < I- < H2O < NH3

  • CN- < NH3 < H2O < I-

  • NH3 < H2O < I- < CN-


C.

CN- < NH3 < H2O < I-

Crystal field splitting ,  depends upon the field produced by the ligand and charge on the metal ion. Order of increasing field strength of the given ligands are :

CN- < NH3 < H2O < I-


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249.

Assertion : Co[Hg(SCN)6] and Hg [Co(SCN)6] are isomers.

Reason : SCN- is a stronger ligand as compared to NCS-.

  • If both assertion and reason are true and reason is the correct explanation of assertion

  • If both assertion and reason are true but reason is not the correct explanation of assertion

  • If assertion is true but reason is false.

  • If both assertion and reason are false


250.

Least coordination number is shown by

  • Co2(CO)8

  • Mn2(CO)10

  • [Fe(en)2NH3]

  • [Cr(OH)3(NH3)3]


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