Multiple Choice QuestionsWhen 0.01 mole of a cobalt complex is treated with excess silver nitrate solution, 4.305 g of silver chloride is precipitated. The formula of the complex is
[Co(NH3)3Cl3]
[Co(NH3)5Cl]Cl2
[Co(NH3)6]Cl3
[Co(NH3)4Cl2]NO
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 isomerism
5. The magnitude of the charge on each complex ion is 1
2 and 4
1 and 4
3 and 5
1 and 2
The primary and secondary valencies of chromium in the complex ion, dichlorodioxalatochromium (III), are respectively
3, 4
4, 3
3, 6
6, 3
C.
3, 6
The formula of dichlorodioxalatochromium (III) is [Cr(Cl2) (Ox)2]3-
Primary valencyof a metal (Cr) in the complex
= oxidation number of that metal
=+ 3
Secondary valency of chromium in complex
= coordination number
=+6
(Coordination number is the number of ligands attached to the central metal ion and oxalate ion is a bidentate ligand ie, can coordinate at two positions).
(A) K4[Fe(CN)6]
(B) K3[Cr(CN)6]
(C) K3(Co(CN)6]
(D) K2(Ni(CN)4]
Select the complexes which are diamagnetic.
(A), (B) and (C)
(B), (C),and (D)
(A), (C) and (D)
(A), (B) and (D)
Which is not true of the co-ordination compound [Co(en)2Cl2]Cl?
Exhibits geometrical isomerism
Exhibits optical isomerism
Exhibits ionisation isomerism
Is an octahedral complex
Aluminium reacts with NaOH and forms compound 'X'. If the coordination number of aluminiumin 'X' is 6, the correct formula of X is -
[Al(H2O)4(OH)2]+
[Al(H2O)3(OH)3]
[Al(H2O)2(OH)4]-
[Al(H2O)6](OH)3
The ratio of anion radius to cation radius of a crystal is 10 : 9.3. Then, the coordination number of the cation in the crystal is
2
6
4
8
Which one of the following gives Prussian blue colour?
Fe2[Fe(CN)6]
Na4[Fe(CN)6]
Fe3[Fe(CN)6]3
Fe4[Fe(CN)6]3
Switch
