Question No:1

A magnetic moment of 1.73 BM will be shown by one among the following

[A] [Cu(NH₃ ) ₄]²⁺
[B] [Ni(CN) ₄]^2-
[C] TiCl₄
[D] [CoCl₆]^4-



Question No:2

Which of the following complexes is used to be as an anticancer agent

[A] Mer- [Co(NH₃)₃Cl₃]
[B] Cis-[Ptcl₂(NH₃)₂]
[C] Cis-K₂[PtCl₂Br₂]
[D] Na₂CoCl₄



Question No:3

Among the following complexes, the one which shows zero crystal field stabilasation energy(CFSE) is

[A] [Mn(H₂O₆]³⁺
[B] [Fe(H₂O₆]³⁺
[C] [Co(H₂O₆]²⁺
[D] [Co(H₂O₆]³⁺



Question No:4

The name of complex ion [Fe(CN₆)]^3- is

[A] hexacyanoiron(III) ion
[B] (C) tricyanoferrate(III) ion
[C] (B) hexacyanitoferrate(III) ion
[D] hexacyanidoferrate(III) ion



Question No:5

The sum of coordination number and oxidation number of the metal M in the complex [M(en)²(C₂O₄) Cl(Where, en is ethylenediamine) is

[A] 9
[B] 6
[C] 7
[D] 8



Question No:6

The hybridisation involved in complex [Ni(CN) ₄]^2- is(Atomic number of Ni=

[A] dsp²4
[B] (C) d²sp²
[C] (D) d²sp³
[D] (B) sp³



Question No:7

Number of possible isomers for the complex [Co(en) ₂Cl will be(en ethylendiamine)

[A] 2
[B] 1
[C] 3
[D] 4



Question No:8

Which of these statements about [Co(CN)]^3-is true ?

[A] [Co(CN)₆]^3-has no unpaired electrons and will be in a low-spin configuration.
[B] [Co(CN)₆]^3-has four unpaired electrons and will be in a low-spin configuration.
[C] [Co(CN)₆]^3-has four unpaired electrons and will be in a low -spin configuration
[D] [Co(CN)₆]^3-has no unpaired electrons and will be in high -spin configuration.



Question No:9

Cobalt(III) chloride forms several octahedral complexes with ammonia. Which of the following will not give test for chloride ions with silver nitrate at 25&8451; ?

[A] CoCl₃.3NH₃
[B] CoCl₃.4NH₃
[C] CoCl₃.5NH₃
[D] CoCl₃.6NH₃



Question No:10

John-Teller effects is not observed in high spin complexes of

[A] d⁷
[B] d⁸
[C] 8⁴
[D] d⁹



Question No:11

The correct increasing order of trans-effect of the following species is

[A] NH ₃ >CN= >Br- >C₆ H₅^–
[B] CN^– >C₆ H₅ – >Br- NH₃
[C] Br^– CN ^– NH₃ C₆ H₅ ^–
[D] CN ^– >Br ^– >C₆H ₅>NH₃



Question No:12

Which of the following pairs of d-orbitals will have electron density along the axis ?

[A] d _z2 ,d _xz
[B] d_xz , d_yz
[C] d₂, d
[D] d _xy , d ^x2-y2



Question No:13

Which of the following has longest C-O bond length?(Free C-O bond length in CO is 1.128A.)

[A] [Co(CO) ₄] ^–
[B] [Fe(CO) ₄] ^2-
[C] [Mn(CO) ₆] ⁺
[D] Ni(CO) ₄



Question No:14

Pick out the correct statement with respect to [Mn(CN) ₆]³⁺

[A] It is sp³d² hybridised and octahedral 6
[B] It is sp³d2 hybridised and tetrahedral
[C] It is d²sp³hybridised and octahedral
[D] It is dsp²hybridised and square planar



Question No:15

Correct increasing order for the wavelengths of absorption in the visible region for the complexes of CO³⁺ is

[A] [Co(en) ₃] ³⁺ ,[Co(NH₃ ) ₆] ³⁺ [Co(H ₂O ₆)] ³⁺
[B] [Co(H₂O) ₆] ³⁺ ,[CO(en₃)] ³⁺, [Co(NH₃ ) ₆] ³⁺
[C] [Co(H₂O₆)₃] ³⁺ ,[Co(NH ₃) ³⁺], [Co(NH₃)₆] ³⁺
[D] [Co(NH₃)₆] ³⁺ ,[Co(en₃) ³⁺], [Co(H₂O) ₆] ³⁺