Question No:1

Select the correct statement.

[A] Geometrical isomer may differ in dipole moment and visible/UV spectra.
[B] Complexes of the type [Ma₃b₃] can also have facial(fac) and meridional(mer) isomer.
[C] No optical isomer exists for the complex trans-[Co(en) ₂Cl₂]⁺.
[D] All of these.



Question No:2

Which of the following coordination compounds would exhibit optical isomerism?

[A] pentamminenitrocobalt(III) iodide
[B] diamminedichloroplatinum(II)
[C] trans-dicyanobis(ethylenediamine) chromium(III) chloride
[D] tris-(ethylendiamine) cobalt(III) bromide



Question No:3

Trien is

[A] Hexa dentate, Mono anionic
[B] tetradentate, neutral
[C] tetradentate, dianion
[D] Mono dentate, anion



Question No:4

Which of the following is diamagnetic complex

[A] [Co(OX) ₃] ^3–, [Fe(CN) ₆] ^3–
[B] [Co(Ox) ₃] ^3–, [FeF₆] ^3–
[C] [Fe(Ox₃)^3–, [FeF ] ^3–
[D] [Fe(CN) ₆]^3-, [CoF₆ ] ^3–



Question No:5

Which of the following can be reduce easily

[A] V(CO) ₆
[B] Mo(CO) ₆
[C] [Co(CO) ₄] ^–
[D] Fe(CO) ₅



Question No:6

The Hybridisation and magnetic behavior of complex [Ni(CO)₄] is :

[A] dsp², paramagnetic
[B] dsp², diamagnetic
[C] sp³, paramagnetic
[D] sp³, diamagnetic



Question No:7

Which of the following complex is optically inactive?

[A] [RhCl(CO)(PPh₃ )(NH₃ )]
[B] [Fe(CO)] ^3–
[C] [Fe(en)₂Cl₂]
[D] [Pd(en)₂Cl₂]



Question No:8

Correct increasing order for the wavelength of absorption in the visible region for the complexes of Co³⁺ is:

[A] [Co(CN₆) ^3- –, [Co(NH₃) ₆]³⁺, [Co(NH ₃)₅ (H₂O)] ³⁺ [Co(NH ₃) ₅ Cl] ⁺²
[B] [Co(CN)₆]^3–, [Co(NH ₃)₅ (H₂ O)] ³⁺ [Co(NH ₃)₅ Cl] ⁺² [Co(NH₃ ) ₆] ³⁺
[C] [Co(NH₃)₆] ³⁺,[Co(CN) ₆] ^3–, [Co(NH₃ ) ₅ (H₂ O)] ³⁺ [Co(NH₃ ) ₅Cl] ⁺²
[D] [Co(NH₃ ) ₅Cl] ⁺² , [Co(NH₃) ₅ (H₂ O)] ³⁺, [Co(NH₃)₆ ] ³⁺, [Co(CN) ₆]



Question No:9

Which of the following complexes has maximum CFSE?

[A] K₃[Fe(CN)₆]
[B] K₃[Co(Ox)₃]
[C] K₃[CoF₆]
[D] K₃[Co(CN)₆]



Question No:10

In Fe(CO) ₅Cr(CO)₆, how many CO ligands can be replaced by NO?

[A] 3, 3
[B] 3, 6
[C] 6, 3
[D] 2, 4



Question No:11

Assertion : NF₃ is a weaker ligand than N(CH₃)₃.
Reason : NF₃ ionizes to give F^– ions in aqueous solution.

[A] If both the assertion and reason are true and reason explains the assertion
[B] If both the assertion and reason are true but reason does not explain the assertion
[C] If assertion is true but reason is false
[D] If assertion is false but reason in true
[E] Both Assertion and Reason are false



Question No:12

Assertion:The[Ni(en)₃]Cl₂(en = ethylenediamine) has lower stability than [Ni(NH₃)₆]Cl₂.
Reason : In [Ni(en)₃]Cl₂the geometry of Ni is trigonal bipyramidal.

[A] If both the assertion and reason are true and reason explains the assertion
[B] If both the assertion and reason are true but reason does not explain the assertion
[C] If assertion is true but reason is false
[D] If assertion is false but reason in true
[E] Both Assertion and Reason are false



Question No:13

Assertion:[Co(NO₂)₃(NH₃)₃] does not show optical isomerism
Reason : It has a plane of symmetry.

[A] If both the assertion and reason are true and reason explains the assertion
[B] If both the assertion and reason are true but reason does not explain the assertion
[C] If assertion is true but reason is false
[D] If assertion is false but reason in true
[E] Both Assertion and Reason are false



Question No:14

Assertion : C – O bond in metal carbonyl is long.
Reason : There is delocalisation of electrons from filled d orbitals into the empty orbitals on the CO ligands.

[A] If both the assertion and reason are true and reason explains the assertion
[B] If both the assertion and reason are true but reason does not explain the assertion
[C] If assertion is true but reason is false
[D] If assertion is false but reason in true
[E] Both Assertion and Reason are false



Question No:15

Assertion : In high spin situation, configuration of d⁵ ions will be t³ _2g e ² _g .
Reason : In high spin situation, pairing energy is less than crystal field energy.

[A] If both the assertion and reason are true and reason explains the assertion
[B] If both the assertion and reason are true but reason does not explain the assertion
[C] If assertion is true but reason is false
[D] If assertion is false but reason in true
[E] Both Assertion and Reason are false