Out of TiF₆^2-, CoF₆^3-, Cu₂Cl₂ and NiCl₄^2- (Z of Ti = 22, Co= 27, Cu = 29, Ni =28) the colourless species are

• TiF₆^2- and CoF₆^3-

• Cu₂Cl₂ and NiCl₄^2-

• TiF₆^2- and Cu₂Cl₂

• TiF₆^2- and Cu₂Cl₂

Which of the following compound will exhibit cis-trans (geometrical) isomerism? 

• 2-butene

• Butanol

• 2-butyne

• 2-butyne

On the basis of the following E^o values; the strongest oxidising agent is

[Fe(CN)₆]^4- → [Fe(CN)₆]^3-] +e^- ;
E^o = -0.35 V

Fe²⁺ → Fe³⁺  +e^-; E = -0.77 V

• [Fe(CN)₆]^4-

• Fe²⁺

• Fe³⁺

• Fe³⁺

Which of the following complexes exhibits the highest paramagnetic behaviour?

Where gly = glycine, en = ethylenediamine and bpy = bipyridyl moities

(At. no. ; Ti = 22, V = 23, Fe =26, Co = 27)

• [V(gly)₂ (OH)₂ (NH₃)₂]⁺

• [Fe(en)(bpy)(NH₃)₂]⁺

• [CO(OX)₂(OH)₂]^-
  

• [CO(OX)₂(OH)₂]^-
  

How many stereoisomers does this molecule have? 

• 4

• 6

• 8

• 8

In which of the following coordination entities the magnitude of Δ_o (CFSE in the octahedral field) will be maximum?

(Atomic number Co = 27)

• [Co(H₂O)₆]³⁺
  

• [CO(NH₃)₆]³⁺

• [CO(CN)₆]^3-

• [CO(CN)₆]^3-

Which of the following will give a pair of enantiomorphs?
(en = NH₂CH₂CH₂NH₂)

• [Co(NH₃)Cl₂]NO₂

• [Cr(NH₃)₆]Co(CN)₆]

• [Co(en)₂Cl₂]Cl

• [Co(en)₂Cl₂]Cl

If there is no rotation of plane polarises light by a compound in a specific solvent, thought to by chiral, it may mean that:

• the compound is certainly a chiral

• the compound is certainly meso

• there is no compound in the solvent

• there is no compound in the solvent

CH₃-CHCl-CH₂-CH₃ has a chiral centre. Which one of the following represents its R configuration?

The d-electron configuration of Cr³⁺, Mn²⁺, Fe²⁺ and Ni²⁺ are 3d⁴, 3d⁵, 3d⁶ and 3d⁸ respectively. Which one of the following aqua complexes will exhibit the minimum paramagnetic behaviour?

(At. no. Cr = 24, Mn = 25, Fe = 26, Ni = 28)

• [Mn(H₂O)₆]²⁺

• [Fe(H₂O)₆]²⁺

• [Ni(H₂O)₆]²⁺

• [Ni(H₂O)₆]²⁺