Among the following coordination compounds/ions

(i) [Fe(CN₆)]^4-

(ii) [pt(NH₃)₂Cl₂]

(iii) [Co(NH₃)₆]³⁺

(iv) [Cr(H₂O₆)]Cl₃

Which species exhibit geometrical isomerism?

(ii) only
(i) and (ii)
(ii) and (iv)
(i) and (iii)

Solution

Geometrical isomerism is possible only in square planar complexes of the type MA₂B₂ and MA₂BC and for octahedral complexes of the type MA₄B₂ and MA₄BC.Hence only(ii) will show geometrical isomerism.

The correct order of magnetic moments (spin only values in B.M.) among is

(Atomic nos. : Mn = 25, Fe = 26, Co = 27)

[Fe(CN)₆]^4- > [MnCl₄]^2- > [CoCl₄]^2-
[MnCl₄]^2- > [Fe(CN)₆]^4- > [CoCl₄]^2-
[MnCl₄]^2- > [CoCl₄]^2- > [Fe(CN)₆]^4-
[Fe(CN)₆]^4-[CoCl₄]^2- > [MnCl₄]^2-

Solution

Which among the following statements are true for the complex [Co(NH₃)₆][Cr(CN)₆] ?

1.It is a non-electrolyte

2.The magnitude of the charge on each complex ion is 3

3.The complex will not conduct current

4.The complex will exhibit coordination is omerism

5.The magnitude of the charge on each complex ion is 1

1 and 4
1 and 2
1 and 3
2 and 4

Solution

[Co(NH₃)₆][Cr(CN)₆] is an ionic compound. Both cation and anioncarry 3 unit charges. It exhibits co-ordination isomerism.

Which one of the following has largest number of isomers ?

(R =alkyl group, en = ethylenediamine)

[Ir(PR₃)₂H(CO)]²⁺
[Ir(PR₃)₂H(CO)]²⁺
[Ru(NH₃)₄Cl₂]⁺
[Co(en)₂Cl₂]⁺

Solution

Among the properties (a) reducing (b) oxidising (c)complexing, the set of properties shown by CN_–ion towards metal species is

c, a
b, c
a, b
a, b, c

Solution

CN^-ion acts good complexing as well as reducing agent.

The ligand N(CH₂CH₂NH₂)₃ is

tridentate
pentadentate
tetradentate
bidentate

Solution

Number of donor atoms (N) in N(CH₂CH₂NH₂)₃ are four.So, N(CH₂CH₂NH₂)₃ is a tetradentate ligand.

One mole of the complex compound Co(NH₃)₅Cl₃, gives 3moles of ions on dissolution in water. One mole of the same complex reacts with two moles of AgNO₃ solution to yield two moles of AgCl (s). The structure of the complex is